ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: A High-Probablity system

  • is such that a leak of refrigerant from failed connections will enter the unoccupied space
  • is such that a leak of refrigerant from failed connections 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 from a failed connection or component of such system

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

  • Magnesium alloy
  • PVC
  • Stainless steel
  • Copper

3: R-22 is classified as a ____ refrigerant on the safety matrix.

  • A-1
  • B-1
  • B-2
  • A-2

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

  • 100%
  • 90%
  • 80%
  • 75%

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

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

6: 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

7: The color code of a tank of ammonia is

  • white
  • lavender
  • silver
  • light green

8: High pressure controls should be set no higher than

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

9: When should a relief valve start to function?

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

10: Refrigeration piping before being buried shall be

  • leak tested
  • encased in pipe duct
  • pressure tested
  • All of the above

11: A class B2 refrigerant is considered

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

12: Fusible plugs must have what marked on them?

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

13: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed

  • 55 lbs
  • 660 lbs
  • 550 lbs
  • 330 lbs.

14: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.

  • True
  • False

15: Who approves containers for refrigerants?

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

16: How far from the ground does a relief valve need to be?

  • Not more than 3' above grade
  • At least 20' above grade
  • At least 15' above grade
  • At least 25' above grade

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: How far from the window does a relief valve need to be according to ASHRAE-15?

  • At least 30'
  • At least 40'
  • At least 20'
  • There is no minimum for relief valve and windows.

19: Institutional occupancy is

  • a premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space.
  • a premise or that portion of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others.
  • a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
  • None of the above

20: 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.

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

21: How many flammability classifications are refrigerants in?

  • 5
  • 3
  • 2
  • 7

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

  • Industrial
  • Place of assembly
  • Large mercantile
  • Instituional

23: NH3 is

  • lithium bromide
  • R-508A
  • R-718
  • ammonia

24: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?

  • Muffler
  • Moisture indicator
  • Foot valve
  • Stop valve

25: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.

  • 80%
  • 75%
  • 99%
  • 90%