ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: There can be no airflow from an occupied space through a machine room unless what?

  • System is high velocity
  • System is ducted and sealed
  • Duct is not located in the ceiling
  • None of the above.

2: Refrigerants shall be classified by

  • color codes
  • maximum permissible quantities of each group
  • toxicity and flammability
  • requirements for commercial, industrial, and residential occupancies

3: Pipe identification labels are required when the system contains more than

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

4: A machine room with a refrigerant system using ammonia shall

  • be provided with a continuously operated ventilation system
  • be considered a non-hazardous location in accordance with National Electrical code
  • have no flame producing apparatus permanently installed and operated
  • All of the above

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

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

6: The gauge thickness required on a CO2 tank construction is

  • 1/8"
  • 3/32"
  • 1/16"
  • 5/16"

7: Can ammonia be used on domestic system?

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

8: A pressure vessel having an inside diameter of 6” or less shall be sufficient to withstand ____times the pressure of the saturation temperature of the refrigerant or ____times the critical pressure of the refrigerant, whichever is less.

  • 6.6, 6.6
  • 2.5, 2.5
  • 2.5, 3.0
  • 3.0, 3.5

9: Pressure vessels nameplate markings must be compliant with the

  • ASHRAE 34 Standards
  • CMR-588 & CMR-528
  • ASME Boiler and Pressure Vessel Code
  • All of the Above

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

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

11: Setting a pressure relief device shall not exceed ___ of the design pressure

  • 75%
  • 90%
  • 100%
  • 80%

12: A movie theater would be considered a

  • public assembly occupancy
  • commercial occupancy
  • institutional occupancy
  • mixed occupancy

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

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

14: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the

  • 24 volt secondary side of the Class 2 transformer to the thermostat
  • first disconnect in
  • load-side of the contactor in
  • breaker panel in

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

  • A3
  • C3
  • B2
  • A2

16: A High-Probability System

  • 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
  • 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

17: Low temperature systems should have what?

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

18: When can recovered refrigerants be reused?

  • They can't
  • Only when used in original owner's equipment
  • Only if used in 30 days of recovery
  • None of the above

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

  • Copper
  • PVC
  • Aluminum
  • Stainless Steel

20: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed

  • 660 lbs
  • 55 lbs
  • 550 lbs
  • 330 lbs.

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

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

22: Whoever owns/uses a refrigeration or air conditioning system covered by this code

  • must notify the Department of Public Safety prior to starting the system
  • shall be licensed by the Commonwealth of Massachusetts according to CMR 522
  • shall make application for inspections to the Chief of Inspectors
  • None of the above

23: How many different groups of refrigerants are there?

  • 3
  • 15
  • 11
  • 7

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

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

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

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