Topics: ASHRAE/CMR
1: A pressure relief should be located at least _______ from windows and doors.
- 25'
- 20'
- 30'
- 15'
2: What would be the classification of a prison?
- Institutional
- Place of assembly
- Industrial
- Large mercantile
3: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above
4: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.
- 8'4"
- 7.25'
- 7.00'
- 9.00'
5: A relief valve discharge capacity is rated in
- PSIA
- PSIG
- temperature minus pounds of air per second divided by release rate squared
- Pounds of air per minute.
6: What type refrigerant is NOT ozone depleting?
- Halon
- HFC
- HCFC
- CFC
7: 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
8: 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
9: R-123 belongs to Group
- B-1
- B-3
- A-3
- B-2
10: B3 refrigerants are considered
- non-toxic but non-flammable
- toxic but non-flammable
- toxic and highly flammable
- non-toxic but flammable
11: 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
12: 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
13: 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
- 330 lbs.
- 550 lbs
14: What is a Category "D" fluid?
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
- A typical refrigerant used on newer air conditioning and heat pump ssytems
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
- Any fluid that exceeds 150 psig and has design temperature of over 366F
15: Name a CFC refrigerant(s):
- R-11
- R-12
- R-123
- both a & b
16: _____ and its alloys are suitable for use with ammonia systems.
- Zinc
- Aluminum
- Copper
- Magnesium
17: All welding done on any refrigeration system or piping covered by 522 CMR 9.00 shall be performed by a according to Section IX of the ASME code
- welder qualified
- licensed technician
- licensed welder
- competent welder
18: How much refrigerant can be stored in a mechanical room outside of the system?
- 150
- 200
- 330
- 100
19: How many refrigerant classifications are there for toxicity?
- 5
- 3
- 2
- 1
20: A High-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 will enter an unoccupied space
21: R-410A is classified as a ____ refrigerant on the safety matrix.
- B-1
- A-1
- A-2
- B-2
22: Class A refrigerants are considered
- non-flammable
- toxic
- non-toxic
- flammable
23: What is Trichlorotrifluoromethane?
- R-13
- R-11
- R-12
- R-113
24: Name three things that must be done when changing refrigeration lubricant?
- Make sure it's compatible, notify owner, notify AHJ
- You can't change lubricants.
- Place sign, check for leaks, insulate
- Nothing must be done
25: Which occupancy can ammonia be used in?
- redifential
- industrial
- commercial
- depends on the quantity of freon