Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: Joints in refrigeration piping must be _____ before being covered?

  • Leak tested
  • Insulated
  • Inspected
  • Pressurized

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

  • Current
  • Ohms
  • Impedance
  • Volts

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

  • Stop valve
  • Muffler
  • Foot valve
  • Moisture indicator

4: Which refrigerant(s) is an HFC?

  • R-22
  • R-410A
  • R-502
  • All of the above

5: Calculate the voltage in a series circuit when the total amperage is 10 amps and the resistors have values of: R1=12 ohms, R2=8 ohms, R3=4 ohms

  • 240 volts
  • 24.0 volts
  • 2.40 volts
  • 2,400 volts

6: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.

  • 20
  • 15
  • 25
  • 10

7: What would be the classification of a prison?

  • Industrial
  • Institutional
  • Large mercantile
  • Place of assembly

8: Halo-carbon refrigerants cannot be used with what material?

  • Aluminum
  • Magnesium alloy
  • Copper
  • Stainless Steel

9: 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

10: The low pressure oil safety switch

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

11: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.

  • 2.5
  • 5.5
  • 3.0
  • 2.0

12: The Board of Boilers adopts by reference

  • the MACS Pressure Vessel Code of Massachusetts
  • the 1997 ANSI/ASHRAE Safety Code
  • MSCA Code
  • Montreal Protocol Safety Code

13: If a condenser is on a roof and the temperature is 35F and dropping the capacity

  • run as designed with low ambient controls
  • doesn't change
  • decreases
  • increases

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

  • 240v
  • 277v
  • 120v
  • 208v

15: A line voltage thermostat controls a 1,200 watt strip header at 120 volts. What must be minimum ampere rated of the stat be?

  • 10 amps
  • 20 amps
  • 5 amps
  • 15 amps

16: A low oil switch is typically

  • time-delay auto reset
  • non used on semi-hermetic compressors over 10 ton capacity
  • manual reset
  • automatic reset

17: Clearance volume

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

18: A single pole-double throw switch used how many wires excluding the ground wire?

  • four
  • five
  • three
  • two

19: Institutional occupancy is

  • a premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space.
  • a premise or that portion of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others.
  • a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
  • None of the above

20: In an air conditioning system, the unit of total heat energy content in an air/vapor mixture is

  • Specific heat
  • Latent heat
  • Enthalpy
  • Sensible heat

21: Give an example of a secondary coolant?

  • R-717
  • R-410A
  • R-718
  • R-12

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

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

23: A start capacitor is wired in _____ with the start windings.

  • junction
  • series-parallel
  • series
  • parallel

24: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant

  • shall have a pressure limiting device and a pressure relief valve installed
  • does not require a pressure-limiting device
  • shall be inspected by the Boiler of Inspectors bi-annually
  • shall have a pressure limiting device installed on the high side of the system

25: What is an example of institutional occupancy?

  • Dorms
  • Hospital
  • Shopping mall
  • Football stadium