Topics: ASHRAE/CMR
1: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UM or UL
- UL and UR
- UV or UR
- UL and UM
2: What pipe can not be used for refrigeration?
- M
- N
- K
- L
3: Class T machine room
- shall have remote controls to stop the action of the refrigerant compressor
- has no flame producing apparatus permanently installed
- shall include closets used for setting equipment
- shall have refrigerant leak detecting systems installed inside and outside the room
4: What type of copper is not permitted on refrigeration systems?
- Type M
- Type L
- Type K
- Type N
5: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- T&P device
- Relief valve
- Circuit Breaker
- Temperature limiter device
6: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
- bi-annually
- regularly
- quarterly
- annually
7: Where are the three places that the discharge from an ammonia relief valve be piped?
- To chemical neutralizing tank only
- Underground, into drain, into mechanical room
- Atmosphere, Tank containing water, where the AHJ indicates.
- None of the above.
8: What is a Category "M" fluid?
- Any fluid that exceeds 150 psig and has design temperatures over 366F
- 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 toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
- A typical refrigerant used on newer air conditioning and heat pump systems
9: Relief valves are rated in
- gallons of water per hour
- gallons of water per minute
- pounds of air per minute
- pounds of air per hour
10: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- 25
- III
- 15
- 10
11: Stop valves shall not be permitted between the system and the
- service valve
- relief valve
- condenser
- bleed valve
12: What is a Category "D" fluid?
- 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
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
13: A pressure relief should be located at least _______ from windows and doors.
- 20'
- 30'
- 15'
- 25'
14: Fusible plugs shall not be used with pressure vessels of
- 15 cubic feet or more
- 15 square feet or less
- 3 cubic feet or less
- 3 cubic feet or more
15: Pressure vessels of 10 cubic feet or more gross volume shall use
- at least one rupture member
- a dual pressure-relief valve if charging into the atmosphere
- at least three means of discharge and/or rupture discs
- both a and b are correct
16: What would be the classification of a prison?
- Industrial
- Place of assembly
- Large mercantile
- Institutional
17: What refrigerant is an inorganic compound?
- R-410A
- Ammonia
- R-132A
- R-22
18: 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, 3.0
- 2.5, 2.5
- 3.0, 3.5
19: Name three things that must be done when changing refrigeration lubricant?
- Place sign, check for leaks, insulate
- Nothing must be done
- You can't change lubricants.
- Make sure it's compatible, notify owner, notify AHJ
20: A movie theater would be considered a
- mixed occupancy
- institutional occupancy
- commercial occupancy
- public assembly occupancy
21: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
- refrigerant sensing
- CO Sensing
- A group sensing
- phosgene gas sening
22: When a refrigerating machinery room is used, the emergency procedures shall be posted
- on a conspicuous card located near the compressor
- outside the room, immediately adjacent to each door
- on a conspicuous card located near the evaporator
- inside the room, immediately adjacent to each door
23: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.
- 25
- 15
- 20
- 10
24: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- the same
- higher
- lower
- there is no Group B1 refrigerants
25: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and
- the owner shall be informed
- explosion precautions must be taken
- gas masks must be worn
- no flames shall be permitted