ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: What refrigerant were phased out in 2004?

  • R-22
  • R-12
  • R-134a
  • R-11

2: What is Trichlorotrifluoromethane?

  • R-12
  • R-113
  • R-13
  • R-11

3: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of

  • the low side
  • the aggregate of the high side and low side
  • 2.5 times the design pressure
  • the high side

4: 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

5: 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

  • outside the machinery room
  • evaporator
  • boiler
  • compressor

6: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.

  • 48
  • 36
  • 18
  • 24

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

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

8: 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

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

  • 75
  • 20
  • 15
  • 50

10: 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

11: What type refrigerant is NOT ozone depleting?

  • HFC
  • CFC
  • Halon
  • HCFC

12: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of

  • the ASME Boiler and Pressure Vessel Code
  • Section 11.3.1.5 ASHRAE 15 Standard
  • the ANSI Standard 10.7.2
  • both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5

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

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

14: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the

  • breaker panel in
  • load-side of the contactor in
  • first disconnect in
  • 24 volt secondary side of the Class 2 transformer to the thermostat

15: A High-Probablity system

  • is such that a leak of refrigerant from failed connections will enter the occupied space
  • is a system highly likely to leak from 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
  • is such that a leak of refrigerant from failed connections will enter the unoccupied space

16: 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

17: What is the minimum height refrigeration piping should be placed against walls?

  • 6'
  • 7.25'
  • Ceiling height
  • 72"

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

  • 20'
  • 15'
  • 30'
  • 25'

19: What is R-22?

  • Chlorodifluoromethane
  • CCFCM
  • HFC
  • Chlorofluoromethane

20: Which refrigerant class listed below is the most flammable?

  • A-3
  • A-1
  • B-2
  • C-3

21: What is a Category "D" fluid?

  • Any fluid that exceeds 150 psig and has design temperature of over 366F
  • A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
  • A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
  • A typical refrigerant used on newer air conditioning and heat pump ssytems

22: High pressure controls should be set no higher than

  • 25% of set point
  • 10% of set point
  • 90% of set point
  • 80% of set point

23: What refrigerant is an inorganic compound?

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

24: Which of the following is an inorganic refrigerant?

  • R-22
  • Ammonia
  • Chlorofluorocarbons
  • All of the above

25: Pressure limiting devices are not required for systems containing less then ________ refrigerants.

  • 13.9 lbs
  • 6.6 lbs
  • 22 lbs
  • 44 lbs