ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

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

2: What do you need to do when you install a new system?

  • Document the superheat and subcooling reading
  • Insulate the suction line before you take a superheat reading
  • Add refrigerant
  • Have it inspected

3: A High-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 will enter an unoccupied 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

4: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.

  • 2.0
  • 2.5
  • 5.5
  • 3.0

5: Pressure vessels having an inside diameter of 6” or less shall be protected by

  • a fusible plug
  • a pressure relief device
  • either a fusible plug or a pressure relief device
  • Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified

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

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

7: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.

  • True
  • False

8: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere

  • 1,000
  • 110
  • 330
  • 6.6

9: 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
  • commercial occupancy
  • business occupancy
  • public assembly occupancy.

10: A High-Probablity system

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

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

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

12: What is an example of institutional occupancy?

  • Football stadium
  • Dorms
  • Hospital
  • Shopping mall

13: R-123 belongs to Group

  • B-3
  • B-1
  • B-2
  • A-3

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

  • Place of assembly
  • Instituional
  • Large mercantile
  • Industrial

15: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.

  • 25
  • 66
  • 50
  • 22

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

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

17: A Category D fluid

  • is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
  • is when the design pressure does not exceed 150 psi
  • a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
  • Both a and b are correct

18: What is not a requirement of a Class T machine room?

  • Self-closing doors
  • Fire hose connected to the building fire protection system.
  • Tight fitting doors
  • Automatic ventilation

19: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8

  • low side of the system
  • high side of the system
  • the vapor side of the system
  • the liquid side of the system

20: Can a R22 line set be reused for a 410A system and if it can be reused, what must be done to it?

  • Flush with R-11
  • Flush with ammonia
  • Flush with R-718
  • Flush with RX-11

21: Doors communicating with outside from a mechanical room must be?

  • Self-closing, wooden, fire door
  • Self-closing, aligned, fire door
  • Steel, approved, weather-stripped
  • Self-closing, approved, fire door

22: What is the refrigerant dichlorodifluoromethane?

  • R-12
  • R-134A
  • R-123
  • R-22

23: A Low-Probability System

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

24: What refrigerant doesn't have to be classified?

  • R-134A
  • R-422A
  • R-718
  • R-717

25: The certificate of inspection

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