Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: The critical temperature of a refrigerant gas occurs when

  • any decrease in pressure will cause condensation
  • the gas returns to a liquid
  • any increase in pressure will not liquefy the gas
  • the gas is no longer saturated

2: Electricity involves the movement of electrons in atoms

  • True
  • False

3: A High-Probability System

  • is such that any leak will cause injury or death to anyone within a 100 square foot area
  • is such that a leak of refrigerant from a failed connection will enter an unoccupied space
  • 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

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

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

5: A mixed occupancy occurs when two or more occupancies are located with the same building

  • true
  • false

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

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

7: Who is permitted to access a refrigeration machine room?

  • Contractors only
  • Authorized persons only
  • Any employee
  • Anyone, it's a completely safe area

8: The absorber shell contains the

  • condenser and the generator
  • evaporator and the absorber
  • condenser, the evaporator, and the generator
  • condenser and the absorber

9: Clearance volume

  • varies depending on compressor speed
  • affects compressor capacity
  • is the same on all compressors
  • has no effect on compressor capacity

10: Where must a refrigeration contractor's license number be displayed?

  • Trucks, invoices, and advertising
  • Uniforms, checks, and invoices.
  • Trucks, license plates, and uniforms
  • Truck, office, every job, and on all equipment

11: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.

  • the atmosphere
  • a de-pressurized recovery tank with a silver top and yellow bottom
  • a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
  • All of the above

12: What is the voltage of each leg of a 480 Volt three-phase motor?

  • 277v
  • 120v
  • 208v
  • 240v

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

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

14: The formula for Pure Power in a resistance circuit is

  • Watts X power factor
  • Kw = volts X amps
  • Watts X amps.
  • Watts = volts X amps

15: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into

  • the low-pressure side of the system
  • the high side of the system
  • the liquid receiver
  • both a and c are correct

16: Pressure vessels having an inside diameter of 6” or less shall be protected by

  • Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
  • a pressure relief device
  • either a fusible plug or a pressure relief device
  • a fusible plug

17: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?

  • Muffler
  • Foot valve
  • Moisture indicator
  • Stop valve

18: The leaving chilled water set point for comfort cooling is typically?

  • 45
  • 38
  • 60
  • 66

19: Which of the following is an inorganic refrigerant?

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

20: A cross charged power element on an expansion valve would normally be used in what temperature range?

  • 30F to 50F
  • -100F to -40F
  • -40F to 0F
  • 0F-38F

21: R-410A can segregate in the system or chemically change its composition due to a leak.

  • True
  • False

22: What pipe can not be used for refrigeration?

  • M
  • L
  • N
  • K

23: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the

  • boiler
  • outside the machinery room
  • compressor
  • evaporator

24: The proper location for an oil separator is between the

  • condenser and receiver
  • receiver and metering device
  • evaporator and compressor
  • compressor and condenser

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

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