Topics: ASHRAE/CMR
1: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
- quarterly
- bi-annually
- regularly
- annually
2: 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
3: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 55 lbs
- 330 lbs
- 500 lbs
- 660 lbs
4: 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.
- 3.0, 3.5
- 2.5, 3.0
- 6.6, 6.6
- 2.5, 2.5
5: Evaporators within 18" of a heating coil must be equipped with a
- low limit control
- pressure relief device
- zone valve
- high limit control
6: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Foot valve
- Moisture indicator
- Stop valve
- Muffler
7: 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
8: Halo-carbon refrigerants cannot be used with what material?
- Stainless Steel
- Magnesium alloy
- Copper
- Aluminum
9: When a refrigerating machinery room is used, the emergency procedures shall be posted
- on a conspicuous card located near the evaporator
- outside the room, immediately adjacent to each door
- on a conspicuous card located near the compressor
- inside the room, immediately adjacent to each door
10: Ammonia can come in contact with _______ ?
- Brass
- Copper tubing
- Copper
- Aluminum
11: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 6.6
- 330
- 110
- 1,000
12: Refrigerants shall be classified by
- toxicity and flammability
- maximum permissible quantities of each group
- requirements for commercial, industrial, and residential occupancies
- color codes
13: A class B1 refrigerant is considered
- non-toxic but highly flammable
- toxic and somewhat flammable
- toxic but non-flammable
- non-toxic and non-flammable
14: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 550 lbs
- 55 lbs
- 330 lbs.
- 660 lbs
15: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into
- the low-pressure side of the system
- the high side of the system
- the liquid receiver
- both a and c are correct
16: Name a CFC refrigerant(s):
- R-11
- R-12
- R-123
- both a & b
17: Where are the three places that the discharge from an ammonia relief valve be piped?
- atmosphere, tank containing water, where the A.H.J. indicates
- underground, into drain, into mechanical room
- to chemical neutralizing tank only
- none of the above
18: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- business occupancy
- public assembly occupancy.
- mercantile occupancy
- commercial occupancy
19: Liquid level gauges must be provided with what?
- A relief valve
- A low level mark
- A red line
- Automatic shut-offs
20: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
21: Pressure vessels having an inside diameter of 6” or less shall be protected by
- a pressure relief device
- a fusible plug
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
- either a fusible plug or a pressure relief device
22: R-410A is classified as a ____ refrigerant on the safety matrix.
- B-2
- A-2
- A-1
- B-1
23: A movie theater would be considered a
- commercial occupancy
- mixed occupancy
- public assembly occupancy
- institutional occupancy
24: A Low-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 can not enter the occupied space
- is such that a leak of refrigerant from a failed connection will enter the occupied space
25: 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