The purpose of a standard control transformer is to:
A) Control the amount of power consumed by electric motors.
B) Increase line voltage from 208 V to 230 V.
C) Reduce line voltage to 24 V for HVACR control systems.
D) Regulate the power supply voltage in an air conditioner.
C
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Determine the change in length of a stud and flange joint with an 85°C decrease in temperature. Before the temperature change, a hex nut was tightened against the top flange with no elongation to the stud. Will the nut become loose with this change in temperature or will it create an elongation in the stud because of the change in the flange thickness?
Stud length from lower flange to hex nut = 200 mm, 
, Coefficient of expansion
Modulus of Elasticity = 
Flange thickness = 200 mm, Coefficient of expansion =
What U.S. manufacturer produced the first vehicle with four-wheel antilock brakes?
A) American Motors B) Chevrolet C) Chrysler D) Lincoln
Leaks can be found by adding dye to the ATF and then using _________ to look for the leak
A) A black light B) A water spray bottle C) A trouble light D) Any of the above
A short in one branch of a parallel circuit results in:
A) increased current flow. B) decreased power consumption. C) increased voltage drops in the remaining branches. D) increased circuit resistance.