Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: 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

2: If the suction pressure is low and the evaporator temperature high, the cause will be a?

  • too small evaporator
  • overcharged
  • starved evaporator
  • compressor suction valve stuck open

3: Ohm's Law indicates Amps X Resistance = ___________.

  • Current
  • Ohms
  • Impedance
  • Volts

4: System design pressures must take into consideration, not only, pressures found during normal operation but also what?

  • When it's cold out
  • When there is a malfunction on the high side
  • When its warm out
  • All of the above

5: The solution that is pumped into the concentrator in an absorption chiller is referred to as the

  • concentrated solution
  • absorbed solution
  • weak solution
  • strong solution

6: A restaurant is classified as a

  • large mercantile occupancy
  • mixed occupancy
  • public assembly occupancy
  • commercial occupancy

7: What would be the classification of a church?

  • Institutional
  • Industrial
  • Large mercantile
  • Place of assembly

8: Setting a pressure relief device shall not exceed ___ of the design pressure

  • 90%
  • 75%
  • 80%
  • 100%

9: What is the minimum size wire you can use on a 30 amp circuit?

  • 12 AWG
  • 16 AWG
  • 10 AWG
  • 14 AWG

10: A Low-Probability System

  • is such that a leak of refrigerant from a failed connection will enter the occupied space
  • is a system highly likely to leak form a failed connection or component of such system
  • is such that a leak of refrigerant from a failed connection can not enter the occupied space
  • is such that any leak will cause injury or death to anyone within a 100 square foot area

11: An accumulator can be located between the

  • condenser and evaporator
  • first stage and second stage compressors
  • evaporator and compressor
  • compressor and condenser

12: Dew point is

  • the temperature below which water vapor in the air will start to evaporate
  • the temperature of air of 50% RH
  • the temperature below which water vapor in the air will start to condense
  • the temperature above which water vapor in the air will start to condense

13: _____ and its alloys are suitable for use with ammonia systems.

  • Copper
  • Aluminum
  • Zinc
  • Magnesium

14: A crankcase heater has a supplied voltage of 100 volts and is drawing 1.4 amps. What is the resistance?

  • 27 ohms
  • 80 ohms
  • 104 ohms
  • 71 ohms

15: When must refrigeration system covered by the code be inspected?

  • Not required
  • Annually
  • Upon installation
  • Annually and when installed

16: one BTU equals

  • 31.4 hp
  • 12,000 hp
  • Pi
  • 3.41 hp

17: Industrial occupancy is

  • a premise or that portion of a premise that is not open to the public, where access by authorized persons is controlled, and that is used to manufacture, process, or store goods, such as chemicals, food, ice, meat, or petroleum.
  • is a premise or that portion of a premise where large number of people congregate and from which occupants cannot quickly vacate the space.
  • a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
  • Both a and b are correct

18: R-123 belongs to Group

  • A-3
  • B-3
  • B-2
  • B-1

19: A mercury bulb controller is not recommended for

  • use where vibration is severe
  • low voltage use
  • line or low voltage use
  • line voltage use

20: What is Trichlorotrifluoromethane?

  • R-11
  • R-13
  • R-113
  • R-12

21: Whoever owns/uses a refrigeration or air conditioning system covered by this code

  • must notify the Department of Public Safety prior to starting the system
  • shall be licensed by the Commonwealth of Massachusetts according to CMR 522
  • shall make application for inspections to the Chief of Inspectors
  • None of the above

22: Which refrigerant class listed below is the most flammable?

  • A-1
  • B-2
  • A-3
  • C-3

23: Methyl Chloride is a halogenated refrigerant and should not come in contact with

  • aluminum
  • zinc
  • magnesium
  • all of the above

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

  • Heat
  • Air
  • Oil
  • Electricity

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

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