ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: 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

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: High pressure controls should be set no higher than

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

4: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.

  • 1
  • 1.5
  • 2.2
  • 1.2

5: How many refrigerant classifications are there for flammability?

  • 7
  • 3
  • 1
  • 2

6: The certificate of inspection

  • shall be authorized by a notarized insurance company
  • shall be posted on the compressor shell or electrical panel at the unit
  • shall be posted and protected from dirt, water, and other elements
  • shall be $20 and an additional fee of $1 for each tone above 20 tons

7: How much refrigerant can be stored in a mechanical room outside of the system?

  • 330
  • 100
  • 150
  • 200

8: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.

  • the atmosphere
  • a de-pressurized recovery tank with a silver top and yellow bottom
  • a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
  • All of the above

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

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

10: R-12. R-22, and R-40 are considered Group I refrigerants.

  • True
  • False

11: How many different groups of refrigerants are there?

  • 15
  • 3
  • 7
  • 11

12: Ammonia belongs to Group

  • B-2
  • A-1
  • A-2
  • B-1

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

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

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

  • place sign, check for leaks, insulate
  • nothing must be done
  • you can't change refrigerants
  • make sure it's compatible, notify owner, notify A.H.J

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

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

16: A Low-Probability System

  • 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 will 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 can not enter the occupied space

17: What must be done to all doors and access points in duct work going through a mechanical room?

  • Must be hindged
  • Must be screwed shut
  • Must be sealed and gasketed
  • All of the above

18: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants

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

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

  • Aluminum
  • Magnesium
  • Zinc
  • Copper

20: B3 refrigerants are considered

  • toxic and highly flammable
  • non-toxic but flammable
  • toxic but non-flammable
  • non-toxic but non-flammable

21: R-22 is considered a(n)

  • CFC
  • HCFCH
  • HFC
  • HCFC

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

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

23: What is an egress?

  • An escape route
  • A code violation
  • An entrance or exit
  • A valve put on the low side of the system to prevent frosting

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

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

25: No open flames are allowed in the machinery room unless?

  • Never can be allowed
  • Only when combustion air is provided from outside of the machinery room
  • Approved by the authorized person
  • Approved by the installing contractor