ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

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

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

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

3: A pressure vessel having an inside diameter of 6” or less shall be sufficient to withstand ____times the pressure of the saturation temperature of the refrigerant or ____times the critical pressure of the refrigerant, whichever is less.

  • 2.5, 2.5
  • 6.6, 6.6
  • 2.5, 3.0
  • 3.0, 3.5

4: What is the refrigerant dichlorodifluoromethane?

  • R-12
  • R-134A
  • R-123
  • R-22

5: A machine room with a refrigerant system using ammonia shall

  • be provided with a continuously operated ventilation system
  • be considered a non-hazardous location in accordance with National Electrical code
  • have no flame producing apparatus permanently installed and operated
  • All of the above

6: Fusible plugs must have what marked on them?

  • Melting temperature in F
  • Melting temperature in C
  • Opening pressure
  • All of the above

7: 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

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

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

9: All electrical work done on refrigeration systems must comply with

  • ASHREA-15 Section 9.2.1
  • OSHA
  • Department of Energy
  • NEC and Massachusetts Modifications

10: What would be the classification for Stop & Shop grocery store?

  • Large mercantile
  • Industrial
  • Instituional
  • Place of assembly

11: Fusible plugs shall not be used with pressure vessels of

  • 15 cubic feet or more
  • 3 cubic feet or more
  • 15 square feet or less
  • 3 cubic feet or less

12: Ammonia can come in contact with _______ ?

  • Copper
  • Aluminum
  • Brass
  • Copper tubing

13: 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

  • evaporator
  • boiler
  • compressor
  • outside the machinery room

14: Setting a pressure relief device shall not exceed ___ of the design pressure

  • 90%
  • 100%
  • 80%
  • 75%

15: How many refrigerant classifications are there for flammability?

  • 1
  • 7
  • 3
  • 2

16: A Category D fluid

  • is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
  • is when the design pressure does not exceed 150 psi
  • a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
  • Both a and b are correct

17: Each machinery room shall contain

  • high and low pressure controls
  • a refrigerant detector located in an area where the refrigerant from a leak will concentrate
  • smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
  • a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate

18: The Department that certifies the transportation of refrigerant is the

  • RSES
  • EPA
  • DOT
  • EPO

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

  • 3
  • 5
  • 2
  • 1

20: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?

  • phosgene gas sening
  • A group sensing
  • CO Sensing
  • refrigerant sensing

21: How much clearance do you need around the perimeter of electrical panels?

  • 12"
  • 18"
  • 36"
  • 24"

22: A class B2 refrigerant is considered

  • toxic and somewhat flammable
  • non-toxic and non-flammable
  • toxic and non-flammable
  • non-toxic and highly flammable

23: Can you use Ammonia in industrial applications?

  • No, never
  • Yes, always
  • Yes, Under certain condidtions
  • When mixed with R-718

24: A Low-Probability System

  • is such that a leak of refrigerant from a failed connection can not enter the occupied 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
  • is such that any leak will cause injury or death to anyone within a 100 square foot area

25: 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