ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.

  • color-coded glass to determine type of refrigerant
  • moisture indicators
  • automatic closing shut-off valves
  • All of the above

2: A High-Probability System

  • 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 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

3: Which refrigerant(s) is an HFC?

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

4: A relief valve discharge capacity is rated in

  • temperature minus pounds of air per second divided by release rate squared
  • PSIG
  • Pounds of air per minute.
  • PSIA

5: _____ alloys shall not be used in contact with an halogenated refrigerants.

  • Copper
  • Nickel
  • Zinc
  • Magnesium

6: A positive displacement compressor is

  • where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
  • a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
  • a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
  • is a reciprocating type compressor with 2 or more pistons

7: 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

8: 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

9: Name three things that must be done when changing refrigeration lubricant?

  • Nothing must be done
  • Make sure it's compatible, notify owner, notify AHJ
  • Place sign, check for leaks, insulate
  • You can't change lubricants.

10: The color code of a tank of ammonia is

  • lavender
  • white
  • light green
  • silver

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

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

12: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.

  • 5
  • 3
  • 1
  • 2

13: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.

  • 50
  • 75
  • 15
  • 20

14: 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

15: System design pressures must take into consideration, not only, pressures found during normal operation but also what?

  • When it's cold out
  • When there is a malfunction on the high side
  • When its warm out
  • All of the above

16: 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 have a pressure limiting device installed on the high side of the system
  • shall be inspected by the Boiler of Inspectors bi-annually

17: Whoever owns/uses a refrigeration or air conditioning system covered by this code

  • must notify the Department of Public Safety prior to starting the system
  • shall be licensed by the Commonwealth of Massachusetts according to CMR 522
  • shall make application for inspections to the Chief of Inspectors
  • None of the above

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

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

19: Halogenated refrigerants cannot be used with what material?

  • Copper
  • Aluminum
  • Stainless steel
  • Magnesium alloy

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

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

21: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere

  • 330
  • 1,000
  • 110
  • 6.6

22: What refrigerant is an inorganic compound?

  • Ammonia
  • R-22
  • R-132A
  • R-410A

23: Low temperature systems should have what?

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

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

  • True
  • False

25: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.

  • HCFC-123
  • Lithium bromide
  • ammonia
  • CFC-11