How should the vacuum gauge and vacuum pump be connected to a four-port manifold?
A) The vacuum gauge is connected to the 3/8-in center port, and the vacuum pump is connected to the 1/4-in center pump.
B) The vacuum gauge is connected to the evaporator coil, and the vacuum pump is connected to the discharge service valve.
C) The vacuum gauge is connected to the 1/4-in center port, and the vacuum pump is connected to the 3/8-in center pump.
D) The vacuum gauge is connected to the discharge service valve, and the vacuum pump is connected to the evaporator coil.
C
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?A devicemade of two unlike metals that is used to measure temperature is called a ____.
A. ?thermocouple B. ?thermometer C. ?barometer D. ?voltmeter
Las ubicaciones peligrosas se tratan en el:
a. Capítulo 2 del NEC®. b. Capítulo 4 del NEC®. c. Capítulo 3 del NEC®. d. Capítulo 5 del NEC®.
What are the steps involved in testing the PCV valve?
What will be an ideal response?
Answer the following statement(s) true (T) or false (F)
1. All motor circuits are protected for both overcurrent and overload conditions. 2. Overcurrent is a low intensity fault current condition caused by accidental short-circuits and ground-faults. 3. Overload is a lower intensity current condition caused by a mechanical overload on the motor. 4. Overload protection is provided before the contactor unit and after the motor being protected. 5. The overload unit controls the normally closed set of overload contacts, which are connected in the control circuit.