Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: A split-phase motor has a ______ winding and a ____ winding

  • start, common
  • run, start
  • duel-run, duel-start
  • run, common

2: On a day with low relative humidity, the two thermometers on a sling psychrometer will read

  • far apart or greater difference
  • a ling psychrometer doesn't have two theremometers.
  • 2F difference
  • nearly the same

3: The level of voltage caused by back electromagnetic force that opens the contacts of a potential relay in order to take the start capacitor out of the circuit is

  • lift voltage
  • run voltage
  • boost voltage
  • pick-up voltage

4: A 3-cubic foot receiver must have what type of relief valve?

  • fusible plug
  • relief valve
  • rupture device
  • none of the above

5: A run capacitor is wired in series with the _____ windings.

  • run
  • start
  • start capacitor
  • common

6: What would be the classification for Stop & Shop grocery store?

  • Instituional
  • Large mercantile
  • Place of assembly
  • Industrial

7: No open flames are allowed in the machinery room unless?

  • Approved by the installing contractor
  • Never can be allowed
  • Approved by the authorized person
  • Only when combustion air is provided from outside of the machinery room

8: If two 500 ohm resistors are connected in series, the resistance will be

  • 20 ohms
  • 1000 ohms
  • 200 ohms
  • 500 ohms

9: If a liquid receiver is designed to receive the refrigerant charge during a pumpdown procedure, it shall have the capacity to

  • release the charge when the pressure exceeds 310 psig or higher
  • hold up to 110% of the pumpdown charge
  • receive the pumpdown charge
  • Pumpdown procedures are not allowed with systems containing liquid recievers

10: Class T machine room

  • shall include closets used for setting equipment
  • shall have remote controls to stop the action of the refrigerant compressor
  • has no flame producing apparatus permanently installed
  • shall have refrigerant leak detecting systems installed inside and outside the room

11: What refrigerant has zero ozone depletion

  • HFC
  • CFC
  • HCFC
  • None of the above

12: How many closing forces operate a thermostatic expansion valve?

  • 3
  • 4
  • 2
  • 1

13: A self contained system

  • is a unit system Group II refrigerants only
  • is any system or part of a system used to increase evaporation by expansion or vaporization
  • is a complete factory made and tested system
  • is a unit system Group I refrigerants only

14: The certificate of inspection

  • shall be posted and protected from dirt, water, and other elements
  • shall be $20 and an additional fee of $1 for each tone above 20 tons
  • shall be posted on the compressor shell or electrical panel at the unit
  • shall be authorized by a notarized insurance company

15: When an electronic bridge is in balance the bridge output will be

  • 15 volts
  • 0 volts
  • 1 volt
  • .01 volts

16: The gauge thickness required on a CO2 tank construction is

  • 1/16"
  • 5/16"
  • 1/8"
  • 3/32"

17: Sublimation occurs when

  • liquid is formed from a gas
  • ice melts and turns to water
  • gas is formed from a liquid
  • gas is formed directly from a solid

18: In an A/C unit, dirty filters will cause

  • low oil pressure
  • high discharge pressure
  • low suction pressure
  • high suction pressur

19: What is specific heat?

  • measured heat
  • heat required to raise the temperature of 1lb of a substance 1 degree
  • the specific heat required to change the state of one cubic foot of air to steam
  • none of the above

20: Instead of using a compressor, an absorption air-conditioning chiller uses which of the following as its driving force?

  • Oil
  • Electricity
  • Heat
  • Air

21: What is the temperature that a liquid and a vapor can exist in equilibrium called?

  • Dry bulb temperature
  • Wet bulb temperature
  • Critical temperature
  • Saturated temperature

22: The color code of a tank of ammonia is

  • silver
  • light green
  • lavender
  • white

23: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8

  • low side of the system
  • the liquid side of the system
  • the vapor side of the system
  • high side of the system

24: Control systems can be classified by

  • safety
  • source of power
  • economy of operation
  • tonnage of system

25: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.

  • 9.00'
  • 7.25'
  • 8'4"
  • 7.00'