Topics: ASHRAE/CMR
1: 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
2: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
3: 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
4: When an inspection is needed, how often must it be done?
- every 36 months
- annually
- every 18 months
- every 24 months
5: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 330 lbs.
- 550 lbs
- 55 lbs
- 660 lbs
6: What type of copper is not permitted on refrigeration systems?
- Type M
- Type L
- Type N
- Type K
7: Halogenated refrigerants cannot be used with what material?
- Magnesium alloy
- Copper
- Aluminum
- Stainless steel
8: What is a Category "M" fluid?
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and the designed temperature is between -20F to 366F
- A typical refrigerant used on newer air conditioning and heat pump systems
- Any fluid that exceeds 150 psig and has design temperatures over 366F
9: What type refrigerant is NOT ozone depleting?
- CFC
- HCFC
- Halon
- HFC
10: A relief valve discharge capacity is rated in
- Pounds of air per minute.
- PSIA
- PSIG
- temperature minus pounds of air per second divided by release rate squared
11: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
- commercial occupancy
- institutional occupancy
- public assembly occupancy
- mixed occupancy
12: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant
- shall be inspected by the Boiler of Inspectors bi-annually
- shall have a pressure limiting device and a pressure relief valve installed
- shall have a pressure limiting device installed on the high side of the system
- does not require a pressure-limiting device
13: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c
14: When must refrigeration system covered by the code be inspected?
- Annually and when installed
- Annually
- Not required
- Upon installation
15: 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.
- 550
- 350
- 100
- 50
16: Large mercantile occupancy is
- a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
- a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
17: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Stop valve
- Foot valve
- Muffler
- Moisture indicator
18: Which of the following are considered inorganic refrigerants?
- R-717 and R-718
- 410A and R-407C
- R-500 and R-502
- None of the above
19: What is an example of institutional occupancy?
- Shopping mall
- Hospital
- Football stadium
- Dorms
20: Which occupancy can ammonia be used in?
- redifential
- commercial
- industrial
- depends on the quantity of freon
21: Where a refrigeration or air conditioning system is installed,
- The company who installed the system must notify the fire department in the jurisdiction where installed
- A field inspection shall be made before it is put into service
- the form or certificate shall be authorized by the Department of Public Safety
- it shall not be operated below prescribed pressuers
22: Pressure vessels with an internal volume of 3 cubic feet or more
- shall use pressure relief devices or fusible plugs
- shall use pressure relief devices
- shall use fusible plugs
- do not need pressure relief protection
23: How many gallons of water do you need per pound of ammonia?
- 100
- 50
- 10
- 1
24: What kind of material can't be used on the outlet of a relief valve?
- Aluminum
- PVC
- Copper
- Stainless Steel
25: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by
- District Engineering Inspectors
- Commissioned Inspectors
- Master licensed Technician
- both a or b