A flow switch may be used to detect ____ over the refrigeration coils, stopping the refrigeration compressor and starting a defrost cycle.
a. insufficient air movement
b. insufficient refrigerant
c. excessive air movement
d. excessive refrigerant
a. insufficient air movement
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Technician A says that powdered metal connecting rods cannot be reconditioned and must be replaced if damaged or worn. Technician B says that the piston and the connecting rod must be correctly assembled according to identifying notches or marks. Who is right?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B
Find the Norton equivalent looking into terminals a-b of the circuit in Fig. 4.102.
 FIGURE 1.png)
Small differences in driveshaft U-joint angles cause vibration ________
A) At highway speeds B) When accelerating from a stop C) Both A and B D) Neither A nor B
What power source does a heater normally operate on?
A) 300 V to 400 V B) 208 V to 240 V C) 150 V to 250 V D) 200 V to 240 V