Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

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

  • mercantile
  • commercial
  • public assembly
  • business

2: Which of the following types of oils are hygroscopic?

  • polyolester (POE)
  • polyalkylene glycol (PAG)
  • naphthene mineral
  • both a and b

3: A rule of thumb in air conditioning is ____ CFM per ton?

  • 600
  • 100
  • 400
  • 500

4: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the

  • breaker panel in
  • 24 volt secondary side of the Class 2 transformer to the thermostat
  • first disconnect in
  • load-side of the contactor in

5: Which of the following is not an air velocity meter?

  • Hydrometer
  • Anemometer
  • Velometer
  • Anemotherm

6: "P" represents ______ in the Watt's law formula

  • amperage
  • watts
  • voltage
  • reactance

7: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?

  • Because it's water
  • Because it's a non-flammable refrigerant
  • Because it's cheap
  • R-718 is not rated unlimited because it's a dangerous refrigerant

8: Machinery rooms must be vented to ______?

  • neutralizing tank
  • basement
  • outdoors
  • unoccupied spaces

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

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

10: A motor starter contains a thermal overload and a

  • 3-way relay
  • solenoid
  • contactor
  • transformer

11: The normal operating evaporator temperature of R-410A for air conditioning is typically

  • 155F
  • 32F
  • 45F
  • 158F

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

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

13: Low ambient controls are used when

  • always
  • when systems run all year round
  • on air conditioning systems only
  • economizers are used

14: Adjusting the spring pressure on a TXV

  • makes no difference
  • changes superheat
  • adjusts the bulb charge
  • changes subcooling

15: How is bring measured?

  • manometer
  • hygrometer
  • hydrometer
  • anemometer

16: A normally operating R-410A system with a condensing temperature of 110F will have a high side pressure of around ______ psig

  • 125 psig
  • 255 psig
  • 365 psig
  • 327 psig

17: In an electrical circuit, what is potential measured in?

  • Volts
  • Amps
  • Ohms
  • Herys

18: What is the boiling point of refrigerant governed by?

  • Compressor RPM's
  • Condenser sub-cooling
  • P&T relationship
  • Evaporator temperature

19: The difference between saturated liquid and saturated vapor is

  • heat
  • volume
  • temperature
  • pressure

20: Defined process piping by code CMR (528)

  • Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
  • Any piping in an industrial space
  • Any piping in an industrial or commercial space
  • All of the above

21: The low pressure oil safety switch

  • never trips
  • resets itself after the time delay has terminated
  • resets itself automatically
  • must be reset manually

22: How many volts would you read on a 480V system phase to phase?

  • 0
  • 1/3 the voltage
  • 277
  • 480

23: Fractionation occurs when

  • the pressures decreases as the heat load decreases
  • some of the blended refrigerant evaporates or condenses before the rest of the blend
  • when a fraction of refrigerant is added as the full charge
  • the pressures increase as the heat load increases

24: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?

  • Relief valve
  • Circuit Breaker
  • Temperature limiter device
  • T&P device

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

  • aluminum
  • zinc
  • magnesium
  • all of the above