Why are pipe threads tapered?
A) The tapered threads create a smooth inner joint to improve flow.
B) The taper allows room for pipe sealing compound between the threads.
C) It is simply not practical to make them any other way.
D) The taper allows pipe threads to tighten and seal.
D
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Engine operation is being discussed. Technician A says preignition can cause engine damage. Technician B says carbon deposits on the pistons can increase the compression ratio. Who is correct?
A. Technician A B. Technician B C. Both technicians D. Neither technician
44 - (-20 ) =
A) 24 B) 64 C) -64 D) -24
What is the most common form of switching used for mechanical thermostats?
A) Magnets B) Spring and bellows C) Mercury bulb D) Warped discs
What is one time constant in an integrating circuit if a 4.7 k? resistor is in series with a 0.005 ?F capacitor?
A) 0.00235 ms B) 2.35 ms C) 0.0235 ms D) 235 ms