ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.

  • 75
  • 15
  • 50
  • 55

2: 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

3: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.

  • 100
  • 350
  • 50
  • 550

4: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a

  • mercantile occupancy
  • public assembly occupancy.
  • business occupancy
  • commercial occupancy

5: How many groups of refrigerants are there?

  • 3
  • 1
  • 7
  • 5

6: Refrigerant restricted in 2004 but used for transition for decades:

  • R-22
  • R-123
  • R-11
  • R-134A

7: 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

8: Machinery rooms must be vented to ______?

  • neutralizing tank
  • unoccupied spaces
  • basement
  • outdoors

9: Which refrigerant(s) is an HFC?

  • R-22
  • R-410A
  • R-502
  • All of the above

10: 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

11: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by

  • District Engineering Inspectors
  • Commissioned Inspectors
  • Master licensed Technician
  • both a or b

12: Low temperature systems should have what?

  • High pour point
  • Low pour point
  • High viscosity
  • None of the above

13: When should a relief valve start to function?

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

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

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

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

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

16: Indirect systems using Group II refrigerants

  • shall be used in refrigeration system in excess of 1,000 lbs
  • shall be used in refrigeration system less than 1,000 lbs
  • shall be used for mechanical equipment only
  • shall have all refrigerant containing parts except piping, installed in a Class T machine room

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: How many refrigerant classifications are there for flammability?

  • 1
  • 3
  • 2
  • 7

19: What type of pressure relief device is used on a CO2 system?

  • Glove valve
  • Gate valve
  • Rupture disk
  • Fusible plug

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

  • 30'
  • 20'
  • 25'
  • 15'

21: Liquid level gauges must be provided with what?

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

22: All electrical work done on refrigeration systems must comply with

  • OSHA
  • NEC and Massachusetts Modifications
  • ASHREA-15 Section 9.2.1
  • Department of Energy

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

24: Can ammonia be used on domestic system?

  • yes
  • yes, for systems under 10 tons
  • no
  • no, unless there is proper ventilation system installed

25: R-22 falls under which safety classification?

  • B-1
  • B-2
  • A-2
  • A-1