Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: With a 5/8" X 5/8" x 3/4" tee, what size is the center connection?

  • 3/8"
  • 3/4"
  • 1/2"
  • 5/8"

2: What are the three components of a transformer?

  • Primary core, secondary coil, and high and low voltage connectors.
  • Contacts, secondary coil, and core
  • Primary coil, secondary coil, and core
  • Primary coil, secondary coil, and copper contacts

3: On a pumpdown system, the liquid-line solenoid is controlled by the

  • defrost timer
  • thermostat
  • low pressure switch
  • low-ambient controller

4: How far from the ground does a relief valve need to be?

  • Not more than 3' above grade
  • At least 25' above grade
  • At least 15' above grade
  • At least 20' above grade

5: A thermometer inside a duct measures ____ heat.

  • hidden
  • latent
  • sensible
  • specific

6: Halo-carbon refrigerants cannot be used with what material?

  • Aluminum
  • Copper
  • Stainless Steel
  • Magnesium alloy

7: What type of material can't be used on the outlet of a relief valve?

  • Copper
  • Magnesium alloy
  • PVC
  • Stainless steel

8: What is the purpose of a surge capacitor on a contactor?

  • to balance the sine waves
  • to keep the contactor pulled in
  • to provide smoother start/stops
  • to protect low voltage equipment

9: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.

  • 5.5
  • 2.5
  • 3.0
  • 2.0

10: After setting up a forward curved fan for the desired conditions, something happened to lower the total static pressure the fan had to operate against. Which would occur?

  • CFM and RPM decrease
  • CFM and HP decrease
  • CFM and HP increase
  • RPM and CFM increase

11: Ammonia belongs to Group

  • A-2
  • B-2
  • B-1
  • A-1

12: What is the voltage of each leg to ground of a three-phase motor with a 460v supply voltage?

  • 120v
  • 277v
  • 208v
  • 240v

13: Halogen refrigerants are corrosive to which type of metal?

  • copper
  • stainless steel
  • black iron
  • magnesium

14: A professional or office building would be considered what type of occupancy?

  • business
  • commercial
  • mercantile
  • public assembly

15: What is R-22?

  • Chlorodifluoromethane
  • CCFCM
  • Chlorofluoromethane
  • HFC

16: A capacitor in series with the start windings will do what?

  • Increase run efficiency by 10% of its rating
  • Increase starting torque
  • Nothing
  • Decrease the RLA to within 10% of its rating

17: When using nitrogen for brazing, the pressure should be:

  • Very low
  • Slightly below atmospheric
  • 50-100 psig
  • 125 psig

18: Evaporators within 18" of a heating coil must be equipped with a

  • low limit control
  • pressure relief device
  • zone valve
  • high limit control

19: Heat is a form of

  • power
  • work
  • matter
  • energy

20: A class B1 refrigerant is considered

  • non-toxic but highly flammable
  • toxic and somewhat flammable
  • non-toxic and non-flammable
  • toxic but non-flammable

21: Pressure vessel having an inside diameter exceeding 6” with an internal pressure greater than 15psig shall be marked directly on or on the nameplate the letters _______________ signifying compliance with the ASME Boiler & Pressure Vessel Code.

  • “UV”
  • “UL”
  • “UM” and “UV”
  • “U” or “UM”

22: _____ alloys shall not be used in contact with an halogenated refrigerants.

  • Magnesium
  • Nickel
  • Zinc
  • Copper

23: The rupture disc on a low-pressure chiller typically releases pressure at

  • 0 psig
  • 10 psig
  • 15 psig
  • 5 psig

24: What happens after your initial inspection of a pressure vessel?

  • Notify the AHJ to let them know that the system been inspected
  • Notify the Fire Marshal that the system has been inspected and approved
  • There is a temporary shut-down until a final inspection can be performed.
  • Inspector leaves a metal tag with a certification listed on it

25: What refrigerant is an inorganic compound?

  • Ammonia
  • R-132A
  • R-22
  • R-410A