ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

2: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?

  • T&P device
  • Relief valve
  • Temperature limiter device
  • Circuit Breaker

3: What must be done to refrigerant pipes before being buried ?(8.10.4)

  • Leak checked
  • Certified
  • Classifed
  • Insulated and installed in a pipe duct (Encased)

4: R-123 belongs to Group

  • B-2
  • A-3
  • B-3
  • B-1

5: What was the main reason for enacting the no venting rule of July 1, 1992?

  • Ozone depletion
  • Green house effect
  • Global warming potential
  • All of the above

6: Where must a refrigeration contractor's license number be displayed?

  • Uniforms, checks, and invoices.
  • Truck, office, every job, and on all equipment
  • Trucks, license plates, and uniforms
  • Trucks, invoices, and advertising

7: When a refrigeration or air conditioning system is installed

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

8: Which refrigerant class listed below is the most flammable?

  • C-3
  • B-2
  • A-3
  • A-1

9: Each machinery room shall contain

  • a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
  • a refrigerant detector located in an area where the refrigerant from a leak will concentrate
  • high and low pressure controls
  • smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements

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

  • Stainless steel
  • Magnesium alloy
  • PVC
  • Copper

11: Class A refrigerants are considered

  • flammable
  • non-toxic
  • non-flammable
  • toxic

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

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

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

  • 50
  • 15
  • 75
  • 20

14: Which refrigerant class listed below is the most flammable?

  • C3
  • A3
  • B2
  • A2

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

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

16: Who approves containers for refrigerants?

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

17: Trichlorofluoromethane is the name of what refrigerant?

  • R-12
  • R-113
  • R-11
  • R-502

18: Which of the following are considered inorganic refrigerants?

  • R-717 and R-718
  • 410A and R-407C
  • R-500 and R-502
  • None of the above

19: How many different groups of refrigerants are there?

  • 11
  • 15
  • 3
  • 7

20: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?

  • 100,000
  • 10,000
  • 100
  • 1,000

21: High pressure controls should be set no higher than

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

22: Class T machine room

  • shall have remote controls to stop the action of the refrigerant compressor
  • shall have refrigerant leak detecting systems installed inside and outside the room
  • shall include closets used for setting equipment
  • has no flame producing apparatus permanently installed

23: A relief valve discharge capacity is rated in

  • PSIA
  • Pounds of air per minute.
  • temperature minus pounds of air per second divided by release rate squared
  • PSIG

24: How many refrigerant classifications are there for toxicity?

  • 1
  • 2
  • 5
  • 3

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

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