The Internet may best be compared to a(n)
A. large network of roads.
B. series of colored lights.
C. loud truck motor.
D. enormous skyscraper.
2. Which one of the following word processing features saves you the most time when keying a document?
A. WYSIWYG
B. Hitting the Delete key
C. Thesaurus
D. Search-and-replace
3. What may happen if a large number of computer users are attempting to access a Web site at the same time that you are?
A. Your computer may shut off.
B. You may be automatically routed to a chat room.
C. You may be unable to link to the site.
D. You may enter the site more quickly than usual.
4. A window frame will expand to fill the entire desktop when you
A. double-click the taskbar.
B. double-click the horizontal scroll bar.
C. click the title bar button marked with two overlapping squares.
D. click the title bar button marked with a single square.
5. The term integration refers to the ability to
A. use a variety of search engines.
B. select different graphics on the computer.
C. employ different fonts in an e-mail.
D. transfer information from one type of program to another.
6. Which of the following functions does a browser perform?
A. Stores your e-mails on tape
B. Finds sites devoted to a particular subject.
C. Links you to the Web
D. Automates data calculation
7. Under normal circumstances, you can't erase or add any information
to a
A. formatted floppy.
B. rewritable CD.
C. CD-ROM.
D. hard disk.
8. What important step should you take upon re-booting in the event the computer loses power before Windows can shut down properly?
A. Delete any files still in the recycle bin.
B. Run the ScanDisk feature.
C. Test your mouse.
D. Open your Web browser.
9. Which of the following is a Windows feature that allows you to temporarily store text?
A. Clipboard
B. WordVault
C. Typeover
D. Normal View
10. The computer mouse is used to
A. store a history of menu choices.
B. operate Windows in the DOS mode.
C. transfer an operating system from one machine to another.
D. control a pointer on the screen.
11. Which of the following software programs provides for e-mail communication?
A. Excel
B. Outlook
C. WordPerfect
D. Access
12. A computer's CPU and hard drive are found in the
A. keyboard.
B. power bar.
C. main peripheral device.
D. system unit.
13. Which of the following describes an advantage of using an electronic spreadsheet rather than a manual spreadsheet?
A. An electronic spreadsheet automatically checks to make sure that the formulas you enter are correct.
B. With an electronic spreadsheet, you would spend more time formatting the document.
C. An electronic spreadsheet automatically recalculates figures when you change numbers in a cell.
D. Wizards provide help with spreadsheet creation.
14. An ellipsis following a menu item tells you
A. there's a submenu that offers additional choices.
B. the item is linked to a Web site.
C. your hard drive is out of space.
D. a dialog box is available.
15. When Clara accesses the programs and documents on her computer by way of icons, she is said to be employing
A. DOS.
B. graphical user interface.
C. Internet Explorer.
D. the network neighborhood.
16. In the Mouse Properties window, you can
A. adjust the mouse's double-click speed.
B. specify new tasks for the mouse to perform.
C. increase the mouse pad's size.
D. change the color of the pointer.
17. The picture that graphically represents the items you use in Windows is called a/an
A. icon.
B. GUI.
C. taskbar.
D. submenu.
18. You can access various sites on the WWW by using hyperlinks or by
A. typing in the site address.
B. entering a key word for your search.
C. choosing options from a menu.
D. following directions on-screen.
19. Search engines enable you to
A. locate Web pages related to a specific subject.
B. find and replace a certain item in Word.
C. connect to a better ISP.
D. talk to people via the computer.
20. The domain in an e-mail message tells you the
A. location of the destination.
B. name of the service provider.
C. subject matter of the message.
D. nature of the host computer. |||1. a
2. d
3. c
4. d
5. d
6. d
7. c
8. b
9. a
10. d
11. b
12. d
13. c
14. a
15. b
16. d
17. a
18. a
19. a
20. b
Tuesday, December 6, 2011
I need some help well answers my son is doing this homework thing and idk the answers i need a answer key help?
The Internet may best be compared to a(n)
A. large network of roads.
B. series of colored lights.
C. loud truck motor.
D. enormous skyscraper.
2. Which one of the following word processing features saves you the most time when keying a document?
A. WYSIWYG
B. Hitting the Delete key
C. Thesaurus
D. Search-and-replace
3. What may happen if a large number of computer users are attempting to access a Web site at the same time that you are?
A. Your computer may shut off.
B. You may be automatically routed to a chat room.
C. You may be unable to link to the site.
D. You may enter the site more quickly than usual.
4. A window frame will expand to fill the entire desktop when you
A. double-click the taskbar.
B. double-click the horizontal scroll bar.
C. click the title bar button marked with two overlapping squares.
D. click the title bar button marked with a single square.
5. The term integration refers to the ability to
A. use a variety of search engines.
B. select different graphics on the computer.
C. employ different fonts in an e-mail.
D. transfer information from one type of program to another.
6. Which of the following functions does a browser perform?
A. Stores your e-mails on tape
B. Finds sites devoted to a particular subject.
C. Links you to the Web
D. Automates data calculation
7. Under normal circumstances, you can't erase or add any information
to a
A. formatted floppy.
B. rewritable CD.
C. CD-ROM.
D. hard disk.
8. What important step should you take upon re-booting in the event the computer loses power before Windows can shut down properly?
A. Delete any files still in the recycle bin.
B. Run the ScanDisk feature.
C. Test your mouse.
D. Open your Web browser.
9. Which of the following is a Windows feature that allows you to temporarily store text?
A. Clipboard
B. WordVault
C. Typeover
D. Normal View
10. The computer mouse is used to
A. store a history of menu choices.
B. operate Windows in the DOS mode.
C. transfer an operating system from one machine to another.
D. control a pointer on the screen.
11. Which of the following software programs provides for e-mail communication?
A. Excel
B. Outlook
C. WordPerfect
D. Access
12. A computer's CPU and hard drive are found in the
A. keyboard.
B. power bar.
C. main peripheral device.
D. system unit.
13. Which of the following describes an advantage of using an electronic spreadsheet rather than a manual spreadsheet?
A. An electronic spreadsheet automatically checks to make sure that the formulas you enter are correct.
B. With an electronic spreadsheet, you would spend more time formatting the document.
C. An electronic spreadsheet automatically recalculates figures when you change numbers in a cell.
D. Wizards provide help with spreadsheet creation.
14. An ellipsis following a menu item tells you
A. there's a submenu that offers additional choices.
B. the item is linked to a Web site.
C. your hard drive is out of space.
D. a dialog box is available.
15. When Clara accesses the programs and documents on her computer by way of icons, she is said to be employing
A. DOS.
B. graphical user interface.
C. Internet Explorer.
D. the network neighborhood.
16. In the Mouse Properties window, you can
A. adjust the mouse's double-click speed.
B. specify new tasks for the mouse to perform.
C. increase the mouse pad's size.
D. change the color of the pointer.
17. The picture that graphically represents the items you use in Windows is called a/an
A. icon.
B. GUI.
C. taskbar.
D. submenu.
18. You can access various sites on the WWW by using hyperlinks or by
A. typing in the site address.
B. entering a key word for your search.
C. choosing options from a menu.
D. following directions on-screen.
19. Search engines enable you to
A. locate Web pages related to a specific subject.
B. find and replace a certain item in Word.
C. connect to a better ISP.
D. talk to people via the computer.
20. The domain in an e-mail message tells you the
A. location of the destination.
B. name of the service provider.
C. subject matter of the message.
D. nature of the host computer. |||a
c
c
d
?
b
a
b
a
d
b
c
d
a
?
a
a
a
a
b||| If you are actually a parent "helping": your son with his home work,you shouldn't . If you are a kid trying to get someone else to do your homework, that's cheating. You can't learn anything if you don't try/|||No parent would post this.
A. large network of roads.
B. series of colored lights.
C. loud truck motor.
D. enormous skyscraper.
2. Which one of the following word processing features saves you the most time when keying a document?
A. WYSIWYG
B. Hitting the Delete key
C. Thesaurus
D. Search-and-replace
3. What may happen if a large number of computer users are attempting to access a Web site at the same time that you are?
A. Your computer may shut off.
B. You may be automatically routed to a chat room.
C. You may be unable to link to the site.
D. You may enter the site more quickly than usual.
4. A window frame will expand to fill the entire desktop when you
A. double-click the taskbar.
B. double-click the horizontal scroll bar.
C. click the title bar button marked with two overlapping squares.
D. click the title bar button marked with a single square.
5. The term integration refers to the ability to
A. use a variety of search engines.
B. select different graphics on the computer.
C. employ different fonts in an e-mail.
D. transfer information from one type of program to another.
6. Which of the following functions does a browser perform?
A. Stores your e-mails on tape
B. Finds sites devoted to a particular subject.
C. Links you to the Web
D. Automates data calculation
7. Under normal circumstances, you can't erase or add any information
to a
A. formatted floppy.
B. rewritable CD.
C. CD-ROM.
D. hard disk.
8. What important step should you take upon re-booting in the event the computer loses power before Windows can shut down properly?
A. Delete any files still in the recycle bin.
B. Run the ScanDisk feature.
C. Test your mouse.
D. Open your Web browser.
9. Which of the following is a Windows feature that allows you to temporarily store text?
A. Clipboard
B. WordVault
C. Typeover
D. Normal View
10. The computer mouse is used to
A. store a history of menu choices.
B. operate Windows in the DOS mode.
C. transfer an operating system from one machine to another.
D. control a pointer on the screen.
11. Which of the following software programs provides for e-mail communication?
A. Excel
B. Outlook
C. WordPerfect
D. Access
12. A computer's CPU and hard drive are found in the
A. keyboard.
B. power bar.
C. main peripheral device.
D. system unit.
13. Which of the following describes an advantage of using an electronic spreadsheet rather than a manual spreadsheet?
A. An electronic spreadsheet automatically checks to make sure that the formulas you enter are correct.
B. With an electronic spreadsheet, you would spend more time formatting the document.
C. An electronic spreadsheet automatically recalculates figures when you change numbers in a cell.
D. Wizards provide help with spreadsheet creation.
14. An ellipsis following a menu item tells you
A. there's a submenu that offers additional choices.
B. the item is linked to a Web site.
C. your hard drive is out of space.
D. a dialog box is available.
15. When Clara accesses the programs and documents on her computer by way of icons, she is said to be employing
A. DOS.
B. graphical user interface.
C. Internet Explorer.
D. the network neighborhood.
16. In the Mouse Properties window, you can
A. adjust the mouse's double-click speed.
B. specify new tasks for the mouse to perform.
C. increase the mouse pad's size.
D. change the color of the pointer.
17. The picture that graphically represents the items you use in Windows is called a/an
A. icon.
B. GUI.
C. taskbar.
D. submenu.
18. You can access various sites on the WWW by using hyperlinks or by
A. typing in the site address.
B. entering a key word for your search.
C. choosing options from a menu.
D. following directions on-screen.
19. Search engines enable you to
A. locate Web pages related to a specific subject.
B. find and replace a certain item in Word.
C. connect to a better ISP.
D. talk to people via the computer.
20. The domain in an e-mail message tells you the
A. location of the destination.
B. name of the service provider.
C. subject matter of the message.
D. nature of the host computer. |||a
c
c
d
?
b
a
b
a
d
b
c
d
a
?
a
a
a
a
b||| If you are actually a parent "helping": your son with his home work,you shouldn't . If you are a kid trying to get someone else to do your homework, that's cheating. You can't learn anything if you don't try/|||No parent would post this.
I'm replacing my Gas Furnace and Central Air Conditioner. Which brand?
I have a 1400 sq ft split entry house with a system that is roughly 35 years old. I recently had Sears come out and price a few systems out for me. They priced Carrier and Kenmore (made by Carrier). The cost of the systems ranged from $8000-11000. The Carrier was only a few hundred more than the Kenmore.
The furnace was variable speed, and the condenser was a two-speed. The range of SEER and efficiency ratings were from 14-15 SEER, and 91-95 efficiency. Some of the models included sound dampening and more of a heavy-duty housing. Also, there was a humidifier and electronic air cleaner, and 7 day programmable thermostat with humidity control.
Warranty was 10 years parts/1 year labor. Additonal 5 year labor, including 5 annual tune-ups was another $1300 (not included in the price).
I feel that this is a lot of money for this equipment? Am I wrong? Also, is Carrier/Kenmore a respected brand? My old house had Rheem and I was pleased. The Sears Salesman said Rheem was a cheap contractor grade unit....Please advise!|||Most of my air conditioning equipment at my work is Rheem, at least the stuff on the ground is.
Rheem has one major redeeming quality that sets it apart - it's designed to be worked on. Most outdoor units you see have the compressor in the center, right in the middle of the condenser coil. That's nice for a compact footprint but it's a big PITA when you need to repair something - gotta reach over the coil, which itself is pretty fragile. Rheem puts it to the side so you can do everything on the level, very convenient.
That price sounds a little strong, but I reckon it includes installation, which isn't small potatoes. But call a few more contractors. Get more prices. Estimates are free, you know. The more info you have, the better armed you are against a hard sell, and the Sears guy knows that a lot of folks that come to Sears for that kind of service really don't want to think about it - they just want it done and will take the hit in the wallet to not have to learn anything.
10 years warranty is good. 1 year labor is typical. Additional warranty isn't really worth it, do some annual maintenance (coil cleaning, for instance) and keep the filters changed and it'll go past 10 years easily.
Check with your local utility, they may have recommendations and/or a financing plan that makes it a little less painful to get a new AC system. Shop around and look for the Energy Star rating, and try for the tax rebate (is that still going? I don't know) to take a little bite off.
Variable speed fan is good, two speed compressor is good. That makes your system more effective at off-peak times, and may cut your utility bill.
IMHO you're seeing a bid that's a little on the high side. Shop around. Rheem is a perfectly good brand, some of the units I have in service are over 15 years old and going strong. Trane is good, Carrier is good, Lennox is good.
Stay away from Goodman and Janitrol.
That's it. Good luck with it.|||I'd go with Rheem|||A salesman is not above putting down another model to make a sale. There is nothing wrong with Rheem, Carrier, York, etc. I would get another contractor or 2 to get different estimates. A 10 Warranty is fine - if something were to go wrong it would usually be in the first year or 2. An additional warranty may not be necessary and, unless you have allergy problems, an electronic air cleaner is not worth it but a humidifier is necessary. If you can get a higher SEER that would be better, the 91-95 efficiency is good even though that also could be improved a bit. I am guessing you have gas heat though you did not mention it. Most gas companies also have a service contract that includes the annual tune-ups at a much lower cost. Look into that as well.
The furnace was variable speed, and the condenser was a two-speed. The range of SEER and efficiency ratings were from 14-15 SEER, and 91-95 efficiency. Some of the models included sound dampening and more of a heavy-duty housing. Also, there was a humidifier and electronic air cleaner, and 7 day programmable thermostat with humidity control.
Warranty was 10 years parts/1 year labor. Additonal 5 year labor, including 5 annual tune-ups was another $1300 (not included in the price).
I feel that this is a lot of money for this equipment? Am I wrong? Also, is Carrier/Kenmore a respected brand? My old house had Rheem and I was pleased. The Sears Salesman said Rheem was a cheap contractor grade unit....Please advise!|||Most of my air conditioning equipment at my work is Rheem, at least the stuff on the ground is.
Rheem has one major redeeming quality that sets it apart - it's designed to be worked on. Most outdoor units you see have the compressor in the center, right in the middle of the condenser coil. That's nice for a compact footprint but it's a big PITA when you need to repair something - gotta reach over the coil, which itself is pretty fragile. Rheem puts it to the side so you can do everything on the level, very convenient.
That price sounds a little strong, but I reckon it includes installation, which isn't small potatoes. But call a few more contractors. Get more prices. Estimates are free, you know. The more info you have, the better armed you are against a hard sell, and the Sears guy knows that a lot of folks that come to Sears for that kind of service really don't want to think about it - they just want it done and will take the hit in the wallet to not have to learn anything.
10 years warranty is good. 1 year labor is typical. Additional warranty isn't really worth it, do some annual maintenance (coil cleaning, for instance) and keep the filters changed and it'll go past 10 years easily.
Check with your local utility, they may have recommendations and/or a financing plan that makes it a little less painful to get a new AC system. Shop around and look for the Energy Star rating, and try for the tax rebate (is that still going? I don't know) to take a little bite off.
Variable speed fan is good, two speed compressor is good. That makes your system more effective at off-peak times, and may cut your utility bill.
IMHO you're seeing a bid that's a little on the high side. Shop around. Rheem is a perfectly good brand, some of the units I have in service are over 15 years old and going strong. Trane is good, Carrier is good, Lennox is good.
Stay away from Goodman and Janitrol.
That's it. Good luck with it.|||I'd go with Rheem|||A salesman is not above putting down another model to make a sale. There is nothing wrong with Rheem, Carrier, York, etc. I would get another contractor or 2 to get different estimates. A 10 Warranty is fine - if something were to go wrong it would usually be in the first year or 2. An additional warranty may not be necessary and, unless you have allergy problems, an electronic air cleaner is not worth it but a humidifier is necessary. If you can get a higher SEER that would be better, the 91-95 efficiency is good even though that also could be improved a bit. I am guessing you have gas heat though you did not mention it. Most gas companies also have a service contract that includes the annual tune-ups at a much lower cost. Look into that as well.
Should I trade my 2002 ford explorer for this 1993 Ford Truck?
My car is a 2002 Ford Explorer, Eddie Bauer, V8, 4x4, with 115000 mi
the option is a 1993 Ford 350 4x4
XLT package power everything
Stereo w/amp CD/MP3 4 Speakers
Custom built Front Bumper powder coated
Matching rear bumper all custom powder coated gray
Custom mounted 12,500 lb Warn Winch w/hand controls
Fuel Injected 460 .030 over 40K miles
MSD II electronic ignition
Ford Racing Products Throttle Body
Custom Hooker Headers
Flow master exhaust
New A/C unit (cold air)
Cold Air intake (K%26amp;N)
Optima Battery
Heavy Duty 4 core aluminum radiator
80-amp HD alternator
18 inch Skyjacker Leaf Spring Suspension lift
8 extended travel gas shocks
Custom installed top cross over steering kit
Steering Stabilizers dual
38 Inch Super Swampers Boggers (new)
16-inch Black Bandits off set steel rims
2 full size spare tires
Custom-built Heavy Duty balanced Spicer Drive Shafts Front/Rear
Built C6 Transmission with B%26amp;M shift kit
B%26amp;M Transmission cooler with steel braided lines
Heavy Duty Transfer w/HD Drive Shafts
Warn Hubs
AVM air lockers front and rear
On board air compressor for lockers with dashboard control
Dana 60 Heavy Duty Front Axle
Dana 70 Extra Heavy Duty Rear Axle
Chrome Molley steel axles Front / Rear
Richmond 456 gears (matched and shaved %26amp; balanced)
Dual front mounted KC highlights
Delta cross top toolbox diamond plate|||why trade down|||well do you want a change or not?|||don go ..!!|||If you wanna get no gas mileage but have a fun *** truck then yeah
the option is a 1993 Ford 350 4x4
XLT package power everything
Stereo w/amp CD/MP3 4 Speakers
Custom built Front Bumper powder coated
Matching rear bumper all custom powder coated gray
Custom mounted 12,500 lb Warn Winch w/hand controls
Fuel Injected 460 .030 over 40K miles
MSD II electronic ignition
Ford Racing Products Throttle Body
Custom Hooker Headers
Flow master exhaust
New A/C unit (cold air)
Cold Air intake (K%26amp;N)
Optima Battery
Heavy Duty 4 core aluminum radiator
80-amp HD alternator
18 inch Skyjacker Leaf Spring Suspension lift
8 extended travel gas shocks
Custom installed top cross over steering kit
Steering Stabilizers dual
38 Inch Super Swampers Boggers (new)
16-inch Black Bandits off set steel rims
2 full size spare tires
Custom-built Heavy Duty balanced Spicer Drive Shafts Front/Rear
Built C6 Transmission with B%26amp;M shift kit
B%26amp;M Transmission cooler with steel braided lines
Heavy Duty Transfer w/HD Drive Shafts
Warn Hubs
AVM air lockers front and rear
On board air compressor for lockers with dashboard control
Dana 60 Heavy Duty Front Axle
Dana 70 Extra Heavy Duty Rear Axle
Chrome Molley steel axles Front / Rear
Richmond 456 gears (matched and shaved %26amp; balanced)
Dual front mounted KC highlights
Delta cross top toolbox diamond plate|||why trade down|||well do you want a change or not?|||don go ..!!|||If you wanna get no gas mileage but have a fun *** truck then yeah
Ok . . . is my car audio system good?
i have . . .
1. dual Pyle Chopper Series 15'' 3600 Watt DVC Subwoofers
Titanium Injected Polypropylene Cone
Non-Fatiguing Big Rubber Suspension
Chrome-Platted Dome Steel Basket
Magnet Sealed Within Basket
Allen Key Magnet Bolts
2.5'' High Temperature Dual Kapton Voice Coil
3600 Watts Peak Power
Impedance: Dual 4 Ohm
70 + 70 oz. Magnet Structure
Fs:21.2, Qms:5.0, Qes:0.90, Qts:0.75, Vas (Cu ft)5.204
SPL: 84 dB
Overall Diameter: 15.84''
Mounting Depth: 8.52''
2- dual depth charge 12" 1000 watt subwoofers i couldnt find the details on them.
3. Pioneer In-Dash DEH-P3000IB
CD Receiver with iPod庐 Direct Control, 7-Way Rotary Commander and Front AUX-input
MP3, WMA, WAV, iTunes AAC Playback
XM and Sirius Radio Ready
Remote Control Included
4. Legacy 4000 Watt 2 Channel Bridgeable MOSFET amplifer
2000 Watts x 2 Output
4000 Watts x 1 Bridged Output
Variable Hi/Lo Electronic Crossover Network
Variable Bass Boost
Variable Input Level (Gain) Control
MOSFET PWM Power Supply
Power ON LED Indicator
LED Protection Indicator
Remote Bass Boost
Hi/Lo Impedance Input
Thermal / Overload / Short Circuit Protection
Anti-Thump Turn-On
Dimensions: 2.09' H x 12.17' W x 21' L
5. Pyle Gear X Series 2 Channel 4000 Watt Bridgeable Mosfet Amplifier
2000 Watts x 2 Output
4000 Watts x 1 Bridged Output
Variable Hi/Lo Electronic Crossover Network
Variable Bass Boost
Variable Input Level ( Gain ) Control
MOSFET PWM Power Supply
Power ON LED Indicator
LED Protection Indicator
Remote Bass Boost (Included)
HI/Lo Impedance Input
Illuminated Top Panel
Thermal / Overload / Short Circuit Protection
Anti-Thump Turn-on
2 Ohm Stereo Stable
Dimensions: 2.32'' H x 11.06'' W x 21'' L
Sold as: Unit
tell me what you think :)
|||yea, i have to agree with everybody else, sorry man, its right in the name that its junk, pyle..pyle of ****, save some money up and buy alpine, kenwood, kicker, ect. brands like that|||If you bought that, I am so sorry for you.|||Yeah, Pyle and Legacy are junk. But, if it sounds good to you then your good to go.
Hoped this helped.|||2 different sized subs, sounds like crap in the making to me. Then on top of that 2 Pyle 15", and then just what are Depth Charge subs? Sounds like garbage to me. Then the amps, Legacy and Pyle, 2 of the worst audio manufacturers in the market. The only thing that you have that is even worth mentioning is the head unit, and that you could have gotten better, for say DVD. Your system to me is garbage. Sorry, I am straight forward and hold no punches.|||that has got to be the worst audio system I've ever seen!
1. dual Pyle Chopper Series 15'' 3600 Watt DVC Subwoofers
Titanium Injected Polypropylene Cone
Non-Fatiguing Big Rubber Suspension
Chrome-Platted Dome Steel Basket
Magnet Sealed Within Basket
Allen Key Magnet Bolts
2.5'' High Temperature Dual Kapton Voice Coil
3600 Watts Peak Power
Impedance: Dual 4 Ohm
70 + 70 oz. Magnet Structure
Fs:21.2, Qms:5.0, Qes:0.90, Qts:0.75, Vas (Cu ft)5.204
SPL: 84 dB
Overall Diameter: 15.84''
Mounting Depth: 8.52''
2- dual depth charge 12" 1000 watt subwoofers i couldnt find the details on them.
3. Pioneer In-Dash DEH-P3000IB
CD Receiver with iPod庐 Direct Control, 7-Way Rotary Commander and Front AUX-input
MP3, WMA, WAV, iTunes AAC Playback
XM and Sirius Radio Ready
Remote Control Included
4. Legacy 4000 Watt 2 Channel Bridgeable MOSFET amplifer
2000 Watts x 2 Output
4000 Watts x 1 Bridged Output
Variable Hi/Lo Electronic Crossover Network
Variable Bass Boost
Variable Input Level (Gain) Control
MOSFET PWM Power Supply
Power ON LED Indicator
LED Protection Indicator
Remote Bass Boost
Hi/Lo Impedance Input
Thermal / Overload / Short Circuit Protection
Anti-Thump Turn-On
Dimensions: 2.09' H x 12.17' W x 21' L
5. Pyle Gear X Series 2 Channel 4000 Watt Bridgeable Mosfet Amplifier
2000 Watts x 2 Output
4000 Watts x 1 Bridged Output
Variable Hi/Lo Electronic Crossover Network
Variable Bass Boost
Variable Input Level ( Gain ) Control
MOSFET PWM Power Supply
Power ON LED Indicator
LED Protection Indicator
Remote Bass Boost (Included)
HI/Lo Impedance Input
Illuminated Top Panel
Thermal / Overload / Short Circuit Protection
Anti-Thump Turn-on
2 Ohm Stereo Stable
Dimensions: 2.32'' H x 11.06'' W x 21'' L
Sold as: Unit
tell me what you think :)
|||yea, i have to agree with everybody else, sorry man, its right in the name that its junk, pyle..pyle of ****, save some money up and buy alpine, kenwood, kicker, ect. brands like that|||If you bought that, I am so sorry for you.|||Yeah, Pyle and Legacy are junk. But, if it sounds good to you then your good to go.
Hoped this helped.|||2 different sized subs, sounds like crap in the making to me. Then on top of that 2 Pyle 15", and then just what are Depth Charge subs? Sounds like garbage to me. Then the amps, Legacy and Pyle, 2 of the worst audio manufacturers in the market. The only thing that you have that is even worth mentioning is the head unit, and that you could have gotten better, for say DVD. Your system to me is garbage. Sorry, I am straight forward and hold no punches.|||that has got to be the worst audio system I've ever seen!
How to Maintain a Variable Frequency Drive?
http://www.powtran.net/faq.asp
How To Maintain a VFD
Do you know how to maintain Variable Frequency Drives (VFDs)? Doing so is easier than you might think. By integrating some simple, logical steps into your preventative maintenance program, you can ensure your drives provide many years of trouble-free service. Before looking at those steps, let's quickly review what is a VFD and how it works?
A Quick Overview
A VFD controls the speed, torque and direction of an AC Induction motor. It takes fixed voltage and frequency AC input and converts it to a variable voltage and frequency AC output. See Training Note "What is a VFD?" for a more detailed description of VFD concepts and operating principles. In very small VFDs, a single power pack unit may contain the converter and inverter.
Fairly involved control circuitry coordinates the switching of power devices, typically through a control board that dictates the firing of power components in the proper sequence. A microprocessor or Digital Signal Processor (DSP) meets all the internal logic and decision requirements.
From this description, you can see a VFD is basically a computer and power supply. And the same safety and equipment precautions you'd apply to a computer and to a power supply apply here. VFD maintenance requirements fall into three basic categories:
keep it clean;
keep it dry; and
keep the connections tight.
Let's look at each of these.
Keep it Clean
Most VFDs fall into the NEMA 1 category (side vents for cooling airflow) or NEMA 12 category (sealed, dust-tight enclosure). Drives that fall in the NEMA 1 category are susceptible to dust contamination. Dust on VFD hardware can cause a lack of airflow, resulting in diminished performance from heat sinks and circulating fans (Photo 1).
Photo 1, Fan Injecting Dust into Drive Enclosure
Dust on an electronic device can cause malfunction or even failure. Dust absorbs moisture, which also contributes to failure. Periodically spraying air through the heat sink fan is a good PM measure. Discharging compressed air into a VFD is a viable option in some environments, but typical plant air contains oil and water. To use compressed air for cooling, you must use air that is oil-free and dry or you are likely to do more harm than good. That requires a specialized, dedicated, and expensive air supply. And you still run the risk of generating electrostatic charges (ESD).
A non-static generating spray or a reverse-operated ESD vacuum will reduce static build-up. Common plastics are prime generators of static electricity. The material in ESD vacuum cases and fans is a special, non-static generating plastic. These vacuums, and cans of non-static generating compressed air, are available through companies that specialize in static control equipment.
Keep it Dry
In Photo 2 you can see what happened to a control board periodically subjected to a moist environment. Initially, this VFD was wall-mounted in a clean, dry area of a mechanical room and moisture was not a problem. However, as is often the case, a well-meaning modification led to problems.
In this example, an area of the building required a dehumidifier close to the mechanical room. Since wall space was available above the VFD, this is where the dehumidifier went. Unfortunately, the VFD was a NEMA 1 enclosure style (side vents and no seal around the cover). The obvious result was water dripping from the dehumidifier into the drive. In six months, the VFD accumulated enough water to produce circuit board corrosion.
Photo 2, Corrosion on Board Traces Caused by Moisture
What about condensation? Some VFD manufacturers included a type of "condensation protection" on earlier product versions. When the mercury dipped below 32 degrees Fahrenheit, the software logic would not allow the drive to start. VFDs seldom offer this protection today. If you operate the VFD all day every day, the normal radiant heat from the heatsink should prevent condensation. Unless the unit is in continuous operation, use a NEMA 12 enclosure and thermostatically controlled space heater if you locate it where condensation is likely.
Keep Connections Tight
While this sounds basic, checking connections is a step many people miss or do incorrectly - and the requirement applies even in clean rooms. Heat cycles and mechanical vibration can lead to sub-standard connections, as can standard PM practices. Retorquing screws is not a good idea, and further tightening an already tight connection can ruin the connection (see Sidebar).
Bad connections eventually lead to arcing. Arcing at the VFD input could result in nuisance over voltage faults, clearing of input fuses, or damage to protective components. Arcing at the VFD output could result in over-current faults, or even damage to the power components. Photos 3 and 4 show what can happen.
Loose control wiring connections can cause erratic operation. For example, a loose S|||This sounds like a laboratory project for physics or engineering. You might try to ask in engineering especially, as this is a very complex and long topic you've asked.
How To Maintain a VFD
Do you know how to maintain Variable Frequency Drives (VFDs)? Doing so is easier than you might think. By integrating some simple, logical steps into your preventative maintenance program, you can ensure your drives provide many years of trouble-free service. Before looking at those steps, let's quickly review what is a VFD and how it works?
A Quick Overview
A VFD controls the speed, torque and direction of an AC Induction motor. It takes fixed voltage and frequency AC input and converts it to a variable voltage and frequency AC output. See Training Note "What is a VFD?" for a more detailed description of VFD concepts and operating principles. In very small VFDs, a single power pack unit may contain the converter and inverter.
Fairly involved control circuitry coordinates the switching of power devices, typically through a control board that dictates the firing of power components in the proper sequence. A microprocessor or Digital Signal Processor (DSP) meets all the internal logic and decision requirements.
From this description, you can see a VFD is basically a computer and power supply. And the same safety and equipment precautions you'd apply to a computer and to a power supply apply here. VFD maintenance requirements fall into three basic categories:
keep it clean;
keep it dry; and
keep the connections tight.
Let's look at each of these.
Keep it Clean
Most VFDs fall into the NEMA 1 category (side vents for cooling airflow) or NEMA 12 category (sealed, dust-tight enclosure). Drives that fall in the NEMA 1 category are susceptible to dust contamination. Dust on VFD hardware can cause a lack of airflow, resulting in diminished performance from heat sinks and circulating fans (Photo 1).
Photo 1, Fan Injecting Dust into Drive Enclosure
Dust on an electronic device can cause malfunction or even failure. Dust absorbs moisture, which also contributes to failure. Periodically spraying air through the heat sink fan is a good PM measure. Discharging compressed air into a VFD is a viable option in some environments, but typical plant air contains oil and water. To use compressed air for cooling, you must use air that is oil-free and dry or you are likely to do more harm than good. That requires a specialized, dedicated, and expensive air supply. And you still run the risk of generating electrostatic charges (ESD).
A non-static generating spray or a reverse-operated ESD vacuum will reduce static build-up. Common plastics are prime generators of static electricity. The material in ESD vacuum cases and fans is a special, non-static generating plastic. These vacuums, and cans of non-static generating compressed air, are available through companies that specialize in static control equipment.
Keep it Dry
In Photo 2 you can see what happened to a control board periodically subjected to a moist environment. Initially, this VFD was wall-mounted in a clean, dry area of a mechanical room and moisture was not a problem. However, as is often the case, a well-meaning modification led to problems.
In this example, an area of the building required a dehumidifier close to the mechanical room. Since wall space was available above the VFD, this is where the dehumidifier went. Unfortunately, the VFD was a NEMA 1 enclosure style (side vents and no seal around the cover). The obvious result was water dripping from the dehumidifier into the drive. In six months, the VFD accumulated enough water to produce circuit board corrosion.
Photo 2, Corrosion on Board Traces Caused by Moisture
What about condensation? Some VFD manufacturers included a type of "condensation protection" on earlier product versions. When the mercury dipped below 32 degrees Fahrenheit, the software logic would not allow the drive to start. VFDs seldom offer this protection today. If you operate the VFD all day every day, the normal radiant heat from the heatsink should prevent condensation. Unless the unit is in continuous operation, use a NEMA 12 enclosure and thermostatically controlled space heater if you locate it where condensation is likely.
Keep Connections Tight
While this sounds basic, checking connections is a step many people miss or do incorrectly - and the requirement applies even in clean rooms. Heat cycles and mechanical vibration can lead to sub-standard connections, as can standard PM practices. Retorquing screws is not a good idea, and further tightening an already tight connection can ruin the connection (see Sidebar).
Bad connections eventually lead to arcing. Arcing at the VFD input could result in nuisance over voltage faults, clearing of input fuses, or damage to protective components. Arcing at the VFD output could result in over-current faults, or even damage to the power components. Photos 3 and 4 show what can happen.
Loose control wiring connections can cause erratic operation. For example, a loose S|||This sounds like a laboratory project for physics or engineering. You might try to ask in engineering especially, as this is a very complex and long topic you've asked.
What methods and tools would have used to integrate and verify the compatibility of data bus equipment with?
the Collins system ?
[Compatibility testing and integration of DAIS multiplex bus equipments
Barber, G. W.; Rich, B. A.
In: NAECON '77; Proceedings of the National Aerospace and Electronics Conference, Dayton, Ohio, May 17-19, 1977. (A78-15551 04-33) New York, Institute of Electrical and Electronics Engineers, Inc., 1977, p. 743-748.
This paper describes the methods and tools to be used to integrate and verify compatibility of data bus equipment with the Digital Avionics Information System (DAIS) multiplex data bus. This includes definitions of DAIS multiplex bus compatibility, integration sequences, integration test software and test procedures. DAIS multiplex bus compatibility is defined for electrical, functional and system protocol considerations. The integration sequences described are stand alone, multiple unit and system level test. The integration test software described consists of a command generation program and the bus equipment diagnostic software. The test procedures describe how the test software is used at each stage of integration.
Keywords: AVIONICS, CHANNELS (DATA TRANSMISSION), DIGITAL SYSTEMS, ELECTRONIC EQUIPMENT TESTS, INFORMATION SYSTEMS, MULTIPLEXING, COMMAND AND CONTROL, COMPATIBILITY, COMPUTER SYSTEMS DESIGN, REMOTE CONSOLES]
Source(s):
http://adsabs.harvard.edu/abs/1977naec.conf..743B|||BUS COMPATIBILITY TESTER would help a bit.
[Compatibility testing and integration of DAIS multiplex bus equipments
Barber, G. W.; Rich, B. A.
In: NAECON '77; Proceedings of the National Aerospace and Electronics Conference, Dayton, Ohio, May 17-19, 1977. (A78-15551 04-33) New York, Institute of Electrical and Electronics Engineers, Inc., 1977, p. 743-748.
This paper describes the methods and tools to be used to integrate and verify compatibility of data bus equipment with the Digital Avionics Information System (DAIS) multiplex data bus. This includes definitions of DAIS multiplex bus compatibility, integration sequences, integration test software and test procedures. DAIS multiplex bus compatibility is defined for electrical, functional and system protocol considerations. The integration sequences described are stand alone, multiple unit and system level test. The integration test software described consists of a command generation program and the bus equipment diagnostic software. The test procedures describe how the test software is used at each stage of integration.
Keywords: AVIONICS, CHANNELS (DATA TRANSMISSION), DIGITAL SYSTEMS, ELECTRONIC EQUIPMENT TESTS, INFORMATION SYSTEMS, MULTIPLEXING, COMMAND AND CONTROL, COMPATIBILITY, COMPUTER SYSTEMS DESIGN, REMOTE CONSOLES]
Source(s):
http://adsabs.harvard.edu/abs/1977naec.conf..743B|||BUS COMPATIBILITY TESTER would help a bit.
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