Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: On a single phase motor, when does the start winding cut out?

  • 50% of its RLA speed
  • 100% of its RLA speed
  • 25% of its RLA speed
  • 75% of its RLA speed

2: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by

  • District Engineering Inspectors
  • Commissioned Inspectors
  • Master licensed Technician
  • both a or b

3: Which has more turns in the windings: Start windings or Run windings?

  • Start windings
  • Run windings
  • They both have the exact same turns
  • Depends on the system and capacitor used

4: What are the three components of a transformer?

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

5: The measurement of heat in a particular substance is

  • sensible heat
  • specific heat
  • enthalpy
  • latent heat

6: When is the only time you can leave a service container attached to a system?

  • Leaking system
  • Recovery
  • Charging
  • Both b and c

7: Which winding have the most turns?

  • run
  • Start
  • depends on the motor phase
  • they have equal amount of turns

8: A plug containing an alloy that will melt at a specific temperature to relief pressure is a

  • rupture plug
  • relief plug
  • fusible plug
  • fusion plug

9: What is the typical air conditioning operating pressures for 410A?

  • 60 psi suction, 210 psi discharge
  • 25 psi suction, 125 psi discharge
  • 105 psi suction, 350 psi discharge
  • None of the above

10: The first step in mechanical refrigeration is

  • expansion
  • compression
  • evaporation
  • condensation

11: Heat is a form of

  • work
  • energy
  • power
  • matter

12: Which of the following is an inorganic refrigerant?

  • R-22
  • Ammonia
  • Chlorofluorocarbons
  • All of the above

13: What pipe can not be used for refrigeration?

  • L
  • K
  • N
  • M

14: The most common type of motor starter is

  • part winding starter
  • duel-winding starter
  • across the line starter
  • delts-wye starter

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

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

16: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of

  • the high side
  • the aggregate of the high side and low side
  • 2.5 times the design pressure
  • the low side

17: What must be done to refrigerant pipes before being buried ?(8.10.4)

  • Leak checked
  • Insulated and installed in a pipe duct (Encased)
  • Certified
  • Classifed

18: Suction line oil traps should be installed when the condenser is

  • more than 100' away from the evaporator
  • in the basement and the evaporator is on the third floor
  • on the third floor roof and the evaporator is in the basement
  • located outside the operates in temperatures below 35F

19: Electricity involves the movement of electrons in atoms

  • True
  • False

20: Who approves containers for refrigerants?

  • D.O.T
  • D.O.E
  • E.P.A
  • D.O.D

21: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.

  • color-coded glass to determine type of refrigerant
  • moisture indicators
  • automatic closing shut-off valves
  • All of the above

22: R-410A is classified as a ____ refrigerant on the safety matrix.

  • B-1
  • B-2
  • A-2
  • A-1

23: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant

  • does not require a pressure-limiting device
  • shall be inspected by the Boiler of Inspectors bi-annually
  • shall have a pressure limiting device and a pressure relief valve installed
  • shall have a pressure limiting device installed on the high side of the system

24: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?

  • When there is a space 6' or more above it
  • When there are sprinklers above
  • When its white
  • When it's used as part of a supply or return air system

25: 14.7 psia is equivalent to

  • atmospheric pressure at seal level
  • 29.92" Hg
  • 0 psig
  • All of the above.