Describe the disadvantage of the direct-coupling technique.
What will be an ideal response?
A drawback of direct-coupled amplifiers is that they are not stable. Any change in the output current of the first stage is amplified by the second stage. This occurs because the second stage is essentially biased by the first stage. To improve the stability requires the use of expensive precision components.
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a. alternator b. DC generator c. regulator d. accelerator
In a conventional gas furnace, the hot flue gases are ____.
A. forced out a PVC vent with a blower B. recycled through a secondary heat exchanger and then vented through a draft diverter C. forced through a type B vent by a blower D. vented by natural convection
Which statement is TRUE about fuse ratings?
A) The fuse rating should be less than the maximum current for the circuit. B) 80% of the fuse rating should equal the current in the circuit. C) The fuse rating should be higher than the normal current for the circuit. D) Both B and C
Manufacturers suggest a diesel-powered vehicle should be driven at least 500 miles (800km) before doing what?
A. Towing a trailer. B. High rpm operation. C. Engine shutdown without extended cooling off periods. D. Carrying passengers.