What is an advantage of a Posi-Drive screw over a Phillips screw?
A. sustains higher torque
B. more tamper resistant
C. reduces slippage
D. All of the above
Answer: D
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Because the costs of goods and services tend to rise over time, the value of money declines with time; this process is referred to as "____."
A. value deflation B. completion inflation C. price inflation D. gross inflation
Why does a walk-in refrigerator evaporator freeze up from too much load or door open?
a. Not enough off-cycle to defrost the coil. b. The evaporator gets too cold trying to pull down the load. c. The condensing pressure gets too high and floods the evaporator.
Pneumatic control systems:
A) Use air pressure to modulate control valves. B) Are the most recent type of commercial control. C) Have no moving parts. D) Use electric motors to modulate control valves.
An Inverter ___________
a. Changes AC voltage to DC voltage. b. Changes DC voltage to DC voltage. c. Changes DC voltage to AC voltage.