ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

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

2: What is an example of institutional occupancy?

  • Football stadium
  • Hospital
  • Shopping mall
  • Dorms

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

  • 15
  • 75
  • 20
  • 50

4: A class A3 refrigerant is considered

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

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

  • Copper
  • Magnesium
  • Nickel
  • Zinc

6: Trichlorofluoromethane is the name of what refrigerant?

  • R-11
  • R-12
  • R-113
  • R-502

7: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested

  • bi-annually
  • regularly
  • annually
  • quarterly

8: Name a CFC refrigerant(s):

  • R-11
  • R-12
  • R-123
  • both a & b

9: What type of relief valve is used on low pressure centrifugal compressor systems?

  • Spring-loaded relief valve
  • Rupture disc
  • Purge relief
  • None of the above

10: 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

11: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.

  • lower
  • there is no Group B1 refrigerants
  • higher
  • the same

12: How many flammability classifications are refrigerants in?

  • 3
  • 7
  • 2
  • 5

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

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

14: How many gallons of water do you need per pound of ammonia?

  • 50
  • 1
  • 10
  • 100

15: A High-Probability System

  • is such that a leak of refrigerant from a failed connection will enter the occupied space
  • is such that a leak of refrigerant from a failed connection will enter an unoccupied 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

16: The main cause of enacting the "no vending rule" of July 1st 1992 was

  • global warming potential
  • ozone depletion
  • both a & b
  • None of the above

17: What is an egress?

  • A code violation
  • An entrance or exit
  • A valve put on the low side of the system to prevent frosting
  • An escape route

18: What must be done to refrigerant pipes before being buried?

  • Leaked checked
  • Encased
  • Certified
  • Coated

19: When should a relief valve start to function?

  • At it's set pressure
  • 10 psi before it's set pressure
  • Two times it's working pressure
  • Before the purge station discharges

20: Pressure vessel having an inside diameter exceeding 6” with an internal pressure greater than 15psig shall be marked directly on or on the nameplate the letters _______________ signifying compliance with the ASME Boiler & Pressure Vessel Code.

  • “U” or “UM”
  • “UV”
  • “UM” and “UV”
  • “UL”

21: Name an HCFC refrigerant(s):

  • R-22
  • R-123
  • R-11
  • both a & b

22: 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

23: When a refrigeration or air conditioning system is installed

  • a field inspection shall be made before it is put into service
  • it shall be approved by the owner for proper operation.
  • the form of certificate shall be authorized by the Department of Pubic safety
  • it shall not be operated below prescribed pressures

24: A positive displacement compressor is

  • 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
  • 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

25: Doors communicating with outside from a mechanical room must be?

  • Self-closing, aligned, fire door
  • Self-closing, approved, fire door
  • Steel, approved, weather-stripped
  • Self-closing, wooden, fire door