ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: A pressure relief should be located at least _______ from windows and doors.

  • 30'
  • 15'
  • 20'
  • 25'

2: 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

3: Stop valves shall not be permitted between the system and the

  • bleed valve
  • relief valve
  • service valve
  • condenser

4: A class B2 refrigerant is considered

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

5: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into

  • the low-pressure side of the system
  • the high side of the system
  • the liquid receiver
  • both a and c are correct

6: _____ and its alloys are suitable for use with ammonia systems.

  • Copper
  • Aluminum
  • Magnesium
  • Zinc

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

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

8: 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

9: 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

10: Can a R22 line set be reused for a 410A system and if it can be reused, what must be done to it?

  • Flush with R-11
  • Flush with RX-11
  • Flush with R-718
  • Flush with ammonia

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

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

12: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.

  • 9.00'
  • 7.00'
  • 7.25'
  • 8'4"

13: 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

14: 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.

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

15: What refrigerant has zero ozone depletion

  • HFC
  • CFC
  • HCFC
  • None of the above

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

  • EPA
  • DOT
  • EPO
  • RSES

17: 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

18: Where a refrigeration or air conditioning system is installed,

  • it shall not be operated below prescribed pressuers
  • The company who installed the system must notify the fire department in the jurisdiction where installed
  • A field inspection shall be made before it is put into service
  • the form or certificate shall be authorized by the Department of Public Safety

19: A Low-Probability 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 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 can not enter the occupied space

20: Ammonia (NH3) is a group III refrigerant

  • True
  • False

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
  • 50
  • 350
  • 100

22: What type of material can't be used on the outlet of a relief valve?

  • Stainless steel
  • Copper
  • Magnesium alloy
  • PVC

23: When air is ducted through a machine room that services occupied space, What must be done?

  • Ducted and sealed
  • Welded and seamed.
  • Flanged and gasketed
  • Insulated and cross broke

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

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

25: R-717 is

  • water
  • trichloromethane
  • carbon dioxide
  • ammonia