Two technicians are discussing U.S. thread sizes. Technician A says fastener threads can be fine or coarse. Technician B says that fine threads provide greater holding strength in soft materials. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B
Answer: A
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When elastomeric insulation is exposed to high temperature, it will _____.
a. catch fire b. melt c. harden d. deform
Reactive power (Pr) in a capacitor is defined as the rate at which a capacitor stores or returns energy and is measured in:
A) volt-ampere reactive. B) volts per time constant. C) watts reactive. D) current per time constant.
The air flow rate in a duct can be found by multiplying the area of the duct times the air speed in the duct.
Answer the following statement true (T) or false (F)
If only 25 percent of the light produced by an emitter is received by the detector due to unclear air, an excess gain of __________ is required to overcome the loss of light.
A. 1´ B. 2´ C. 4´ D. 8´