Topics: ASHRAE/CMR
1: Which occupancy can ammonia be used in?
- depends on the quantity of freon
- industrial
- commercial
- redifential
2: 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
- 550
- 350
- 50
3: Who authorizes changes to the safety codes?
- Contractor who last serviced the system.
- Person in charge of the facility
- Board of Boilers
- Person who pulled the permit
4: A relief valve discharge capacity is rated in
- PSIG
- PSIA
- Pounds of air per minute.
- temperature minus pounds of air per second divided by release rate squared
5: Trichlorofluoromethane is the name of what refrigerant?
- R-11
- R-12
- R-502
- R-113
6: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- there is no Group B1 refrigerants
- higher
- lower
- the same
7: Large Mercantile occupancy is a premise or that portion of a premise where more than ____ persons congregate on levels above or below the street level to purchase personal merchandise.
- 100
- 400
- 250
- 350
8: How much clearance do you need around the perimeter of electrical panels?
- 24"
- 36"
- 18"
- 12"
9: Name an HCFC refrigerant(s):
- R-22
- R-123
- R-11
- both a & b
10: A restaurant is classified as a
- commercial occupancy
- large mercantile occupancy
- public assembly occupancy
- mixed occupancy
11: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 660 lbs
- 550 lbs
- 330 lbs.
- 55 lbs
12: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class M machinery room
- Class T machinery room
- Class A machinery room
- Class B machinery room
13: What must be done to refrigerant pipes before being buried?
- Coated
- Certified
- Encased
- Leaked checked
14: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 80%
- 100%
- 90%
- 75%
15: 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
16: Ammonia belongs to Group
- A-1
- B-1
- A-2
- B-2
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: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UV or UR
- UM or UL
- UL and UR
- UL and UM
19: When a refrigeration or air conditioning system is installed
- the form of certificate shall be authorized by the Department of Pubic safety
- it shall be approved by the owner for proper operation.
- it shall not be operated below prescribed pressures
- a field inspection shall be made before it is put into service
20: Refrigerants shall be classified by
- requirements for commercial, industrial, and residential occupancies
- maximum permissible quantities of each group
- toxicity and flammability
- color codes
21: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
22: R-123 belongs to Group
- B-3
- B-2
- A-3
- B-1
23: 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
24: The certificate of inspection
- shall be $20 and an additional fee of $1 for each tone above 20 tons
- shall be posted and protected from dirt, water, and other elements
- shall be posted on the compressor shell or electrical panel at the unit
- shall be authorized by a notarized insurance company
25: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above