Why is it necessary to purge gauge manifold valves while they are connected?
A) To prevent valve damage B) To stop refrigerant loss
C) To prevent contamination of the system D) To preserve the system's charge
[Ques. 2] When can a compound gauge can be connected to a pressure higher than the maximum pressure it can read accurately?
A) Never. Gauges should never be connected to pressures above the maximum pressure that the gauge can accurately read.
B) Only if the hose ends are reversed to prevent overpressurizing the gauges
C) Only if the pressure does not exceed its retard range
D) Anytime. It does not hurt a gauge to be connected to pressures above its rating.
[Ques. 3] When looking for information on physical and chemical properties, the section to look at in a SDS is section:
A) 8. B) 7. C) 6. D) 9.
[Ques. 4] Why do some technicians recommend using a separate refrigerant tank when purging hoses?
A) To preserve coolant B) To maintain pressure levels
C) To continue refrigerant flow D) To preserve system charge
[Ques. 5] Zeotropic refrigerant blends condense and evaporate at:
A) A single pressure. B) Multiple pressures.
C) A single temperature. D) Multiple temperatures.
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