Which of the following can multimeters be used to measure?
A) Temperature, resistance, and distance B) Voltage, current, and resistance
C) Voltage, temperature, and pressure D) Current, pressure, and temperature
[Ques. 2] A thermostatic expansion valve system operating with a refrigerant overcharge will have:
A) Higher temperature drop across the evaporator. B) A low superheat.
C) A high system subcooling. D) A low system subcooling.
[Ques. 3] What is one of the disadvantages of using dyes in leak detection?
A) They do not reveal precise locations.
B) They are difficult to clean from the affected area.
C) They are highly sensitive to small coolant amounts.
D) They gradually damage the overall system.
[Ques. 4] Why is a pressure regulator necessary when using nitrogen cylinders?
A) The nitrogen must be carefully controlled because it is toxic.
B) To boost the pressure leaving the nitrogen cylinder high enough to be used
C) Because the nitrogen is extremely expensive and must be carefully rationed
D) To reduce the pressure in the nitrogen cylinder to a safe level
[Ques. 5] In leak detection, R-22 is used in conjunction with which of the following?
A) Electronic detection B) Soap bubbles
C) Ultrasound D) Visual inspection
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