Скачать или смотреть REFRIGERATION HVAC MECHANIC RED SEAL LICENSE EXAM PREP PRACTICE QUESTIONS – Multiple Choice set 30

REFRIGERATION HVAC MECHANIC RED SEAL LICENSE EXAM PREP PRACTICE QUESTIONS – sample test review

Multiple Choice set 30

1. The maximum allowable temperature for storing refrigerant is?
a. 125 F
b. 135 F
c. 140 F
d. 145 F

2. When heat load in evaporator decreases, _________ pressure/s decrease.
a. only suction
b. only discharge
c. both suction and discharge
d. neither

3. Motor used in HVAC applications having low starting torque?
a. PSC motor
b. ECM
c. CSCR motor
d. shaded pole
motor

4. During summer season, without changing the air temperature, human comfort can be enhanced by _________ moisture?
a. adding
b. removing
c. maintaining
d. none-of-the-above

5. Latent heat of fusion is energy required to change a liquid to _________ without change in temperature.
a. vapor
b. solid
c. plasma
d. flash gas

6. Power factor of purely resistive circuit is?
a. exponential
b. zero
c. unity
d. infinity

7. Wye delta starters are used for _________ inertia loads such as centrifugal air-conditioning units.
a. low
b. minimal
c. high
d. moderate

8. A perfect vacuum is?
a. 14.7 psia
b. 0 psia
c. 0 Kelvin
d. 0 psig

9. Lack of air over the condenser results in?
a. high head pressure
b. high power consumption
c. low system capacity
d. all-of-the-above

10. Which one is equal to 50 psia?
a. 25.3 psig
b. 64.7 psig
c. 35.3 psig
d. 30.7 psig

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