Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: The oil separator is always inserted in the system

  • where it can be easily serviced
  • to prevent oil logging
  • in a cool spot
  • in the discharge line

2: What is the minimum height refrigeration piping should be placed against walls?

  • 7.25'
  • Ceiling height
  • 6'
  • 72"

3: A start capacitor in series with a start winding will

  • decrease the amp draw of the motor
  • increase running efficiency
  • increase the amp draw of the motor
  • increase starting torque

4: On an air cooled condenser, if the ambient air is 35F and dropping, what's its effect to the condensor?

  • it would make the condenser less efficient
  • it would cause the condenser to sweat
  • it would make the condenser more efficient
  • it would have no effect on the condenser

5: 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

6: What is the temperature that a liquid and a vapor can exist in equilibrium called?

  • Dry bulb temperature
  • Critical temperature
  • Saturated temperature
  • Wet bulb temperature

7: What does safe access mean?

  • A clear unobstructed path to the equipment and controls
  • OSHA approved
  • Locked doors
  • Well-lit exit signs

8: The 4 basic methods of determining whether the proper amount of refrigerant is being introduced into the system are

  • sight glass, weight, pressure, and dipstick
  • Buss-eye, weight, pressure, and frost line
  • sight glass, weight, paper method, and frost line.
  • sight glass, weight, pressure, and frost line

9: How many refrigerant classifications are there for toxicity?

  • 5
  • 3
  • 1
  • 2

10: A Low-Probability 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
  • 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 will enter the occupied space

11: Low ambient controls are used when

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

12: What chemical in the refrigerant set off the leak detection alarm?

  • Fluorine
  • Chlorine
  • Both A and B
  • none of the above

13: What type of refrigerants are NOT flammable?

  • CHC
  • HFC
  • HCFC
  • All of the above

14: 14.7 psia is equivalent to

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

15: 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 HP increase
  • CFM and HP decrease
  • CFM and RPM decrease
  • RPM and CFM increase

16: All welding done on any refrigeration system or piping covered by 522 CMR 9.00 shall be performed by a according to Section IX of the ASME code

  • welder qualified
  • licensed technician
  • licensed welder
  • competent welder

17: Electricity involves the movement of electrons in atoms

  • True
  • False

18: The amount of heat required to raise the temperature of 1 lb of water 1F is?

  • 1 Therm
  • 1 BTU
  • 1 Kelvin
  • The rate of conduction

19: Heat transferred by conduction from one body to another is done

  • via radiation
  • via heat rays
  • via solids
  • via liquids

20: What is a high-side float?

  • Located in the liquid line entering the evaporator, so when the refrigerant level is higher in the liquid line than the evaporator, the float rises to allow more refrigerant flow into the evaporator
  • Located in the liquid line entering the evaporator, is a float-type metering device that rises to reduce refrigerant flow when the liquid refrigerant level rises in the high side of the chiller
  • An electronic-type metering device that contains a float assembly within the device which can accurately meter refrigerant into the evaporator as the load varies
  • Located in the evaporator, is a float-type metering device that rises to reduce refrigerant flow when the liquid refrigerant level rises in the low side of the chiller

21: What must be done if refrigeration lines pass through a concrete floor?

  • moisture barrier
  • insulated
  • installed through a pipe casing
  • leak checked

22: R-12. R-22, and R-40 are considered Group I refrigerants.

  • True
  • False

23: At higher altitudes, boiling temperatures

  • increase
  • depends on the refrigerant
  • decrease
  • are unaffected

24: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)

  • Pressure gauge
  • Temperature gauge
  • Sight glass gauge
  • All of the above

25: 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