ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: The color code of a tank of ammonia is

  • lavender
  • silver
  • white
  • light green

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

  • regularly
  • annually
  • bi-annually
  • quarterly

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

  • 110
  • 1,000
  • 330
  • 6.6

4: What is the minimum size of the discharge pipe?

  • Same size as the outlet of the relief valve
  • One pipe size larger that the inlet of the relief valve
  • Depends on size of manifold
  • All of the above

5: What happens after your initial inspection of a pressure vessel?

  • Notify the AHJ to let them know that the system been inspected
  • There is a temporary shut-down until a final inspection can be performed.
  • Inspector leaves a metal tag with a certification listed on it
  • Notify the Fire Marshal that the system has been inspected and approved

6: 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'
  • 8'4"
  • 7.00'
  • 7.25'

7: A Low-Probability System

  • is such that a leak of refrigerant from a failed connection can not enter the occupied space
  • 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 a failed connection will enter the occupied space
  • is a system highly likely to leak form a failed connection or component of such system

8: All machine rooms must be outfitted with a detector that _______?

  • activates an audible alarm
  • activates a visual alarm
  • starts the ventilation system
  • All of the above

9: Who approves containers for refrigerants?

  • D.O.D
  • E.P.A
  • D.O.E
  • D.O.T

10: Before you change the type of refrigerant in a refrigeration system, what three things must be done?

  • Nothing must be done
  • Make sure its compatible, notify owner, and notify AHJ.
  • you can never change refrigerants
  • Place sign, check for leaks, and insulate suction line

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

  • 10
  • 100
  • 50
  • 1

12: Systems containing more than 110 pounds must have stop valves located at the

  • compressor suction inlet
  • compressor discharge outlet
  • receiver inlet and outlet
  • All of the above

13: 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

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

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

15: What must be done if refrigeration lines pass through a concrete floor?

  • installed through a pipe casing
  • insulated
  • leak checked
  • moisture barrier

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

  • Aluminum
  • Copper
  • Zinc
  • Magnesium

17: 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

18: A High-Probability 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 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 a system highly likely to leak form a failed connection or component of such system

19: 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

20: A positive displacement compressor is

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

21: Ammonia is under what safety classification?

  • B2
  • A3
  • B1
  • B3

22: R-11 belongs to Group

  • A-1
  • B-3
  • A-2
  • B-1

23: When an inspection is needed, how often must it be done?

  • annually
  • every 24 months
  • every 36 months
  • every 18 months

24: What does safe access mean?

  • Well-lit exit signs
  • A clear unobstructed path to the equipment and controls
  • Locked doors
  • OSHA approved

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

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