Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

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

  • aluminum
  • zinc
  • magnesium
  • all of the above

2: What is an example of institutional occupancy?

  • Football stadium
  • Shopping mall
  • Dorms
  • Hospital

3: A single pole-double throw switch uses how many wires?(excluding the ground)

  • 5
  • 3
  • 2
  • 4

4: What is the minimum size of the discharge pipe?

  • Same size as the outlet of the relief valve
  • One pipe size larger that the inlet of the relief valve
  • Depends on size of manifold
  • All of the above

5: It takes how many BTU's of latent heat/hr to boil 1 lbs of water into steam?

  • 970 BTU
  • 24,000 BTU
  • 144 BTU
  • 12,000 BTU

6: Cooling tower lowers condenser water temp by

  • evaporative cooling
  • running fans at 100%
  • condensation
  • running water thru a secondary heat exchanger

7: Low temperature systems should have what?

  • High pour point
  • Low pour point
  • High viscosity
  • None of the above

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

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

9: "E" references ____ in the Ohm's law formula

  • resistance
  • amperage
  • capacitance
  • voltage

10: The most common type of motor starter is

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

11: Which creates more of a heat load?

  • 50% RH
  • 30% RH
  • 70% RH
  • 90% RH

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

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

13: Which is considered the more efficient condenser?

  • fan cooled
  • air cooled
  • spray cooled
  • water cooled

14: Pressure relief valves shall be marked with the data from

  • Section VIII Division of the ASME Boiler & Pressure Code
  • Section IV Division of the ASME Boiler & Pressure Code
  • Section I Division VIII of ASME Boiler & Pressure Code
  • Section XIII Division of the ASME Boiler & Pressure Code

15: What is the maximum voltage range allowed on an electrical circuit?

  • 15%
  • 5%
  • 10%
  • 20%

16: Before you change the type of refrigerant in a refrigeration system, what three things must be done?

  • place sign, check for leaks, insulate
  • nothing must be done
  • you can't change refrigerants
  • make sure it's compatible, notify owner, notify A.H.J

17: How many square inches per square foot?

  • 24
  • 144
  • 98
  • 64

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

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

19: A Low-Probability System

  • 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
  • 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 can not enter the occupied space

20: What is the voltage of each leg to ground of a three-phase motor with a 460v supply voltage?

  • 240v
  • 208v
  • 120v
  • 277v

21: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.

  • 550
  • 100
  • 350
  • 50

22: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.

  • True
  • False

23: 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

24: The purpose of an accumulator is to

  • reduce friction loss to the flow of refrigerant
  • store excess refrigerant from the reciver
  • filter out impurities from the system
  • assure no liquid returns to the compressor

25: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?

  • fusible plug
  • relief valve
  • rupture disc
  • all of the above