ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

  • 80%
  • 99%
  • 75%
  • 90%

2: A hotel is considered a _______ occupancy.

  • residential
  • commercial
  • mercantile
  • institutional

3: A declaration test is needed when the system contains more than

  • 55 lbs
  • 110 lbs
  • 65 lbs
  • 120 lbs

4: Relief valves are rated in

  • gallons of water per hour
  • pounds of air per hour
  • gallons of water per minute
  • pounds of air per minute

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

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

6: Joints in piping for refrigeration containing parts must withstand temperatures of ___?

  • 800F
  • 700F
  • 600F
  • 1000F

7: The main purpose of a refrigerant detector in a machinery room is to

  • inform there is a refrigerant leak int he system
  • detect toxins in the air caused by a refrigerant leak
  • to set off an alarm when there is refrigerant present inside the room
  • all of the above

8: Ammonia (NH3) is a group III refrigerant

  • True
  • False

9: Large Mercantile occupancy is a premise or that portion of a premise where more than ____ persons congregate on levels above or below the street level to purchase personal merchandise.

  • 100
  • 400
  • 250
  • 350

10: Trichlorofluoromethane is the name of what refrigerant?

  • R-11
  • R-12
  • R-502
  • R-113

11: 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

12: Which of the following is an inorganic refrigerant?

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

13: How many flammability classifications are refrigerants in?

  • 7
  • 2
  • 5
  • 3

14: A Low-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 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 a system highly likely to leak form a failed connection or component of such system

15: Dual-pressure relief devices should be installed on

  • vessels of 3 cubic feet or more
  • vessels of 3 cubic feet or less
  • vessels of 10 cubic feet or more
  • vessels of 10 cubic feet or less

16: Who approves containers for refrigerants?

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

17: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?

  • R-718 is not rated unlimited because it's a dangerous refrigerant
  • Because it's cheap
  • Because it's water
  • Because it's a non-flammable refrigerant

18: What is an example of institutional occupancy?

  • Dorms
  • Hospital
  • Football stadium
  • Shopping mall

19: The color code of a tank of ammonia is

  • lavender
  • light green
  • white
  • silver

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

  • True
  • False

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

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

22: 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

23: 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

24: A professional or office building would be considered what type of occupancy?

  • business
  • commercial
  • public assembly
  • mercantile

25: Liquid level gauges must be provided with what?

  • A relief valve
  • Automatic shut-offs
  • A low level mark
  • A red line