Topics: ASHRAE/CMR
1: Which occupancy can ammonia be used in?
- redifential
- industrial
- depends on the quantity of freon
- commercial
2: The Board of Boilers adopts by reference
- Montreal Protocol Safety Code
- the 1997 ANSI/ASHRAE Safety Code
- the MACS Pressure Vessel Code of Massachusetts
- MSCA Code
3: A restaurant is classified as a
- public assembly occupancy
- mixed occupancy
- commercial occupancy
- large mercantile occupancy
4: Liquid level gauges must be provided with what?
- Automatic shut-offs
- A relief valve
- A low level mark
- A red line
5: When a refrigeration or air conditioning system is installed
- a field inspection shall be made before it is put into service
- the form of certificate shall be authorized by the Department of Pubic safety
- it shall not be operated below prescribed pressures
- it shall be approved by the owner for proper operation.
6: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?
- Because it's cheap
- Because it's a non-flammable refrigerant
- Because it's water
- R-718 is not rated unlimited because it's a dangerous refrigerant
7: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 15
- 18
- 24
- 10
8: Setting a pressure relief device shall not exceed ___ of the design pressure
- 75%
- 80%
- 90%
- 100%
9: What is a Category "M" fluid?
- A typical refrigerant used on newer air conditioning and heat pump systems
- Any fluid that exceeds 150 psig and has design temperatures over 366F
- 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
10: 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.
- 9.00'
- 8'4"
- 7.25'
- 7.00'
11: What would be the classification of a prison?
- Institutional
- Place of assembly
- Large mercantile
- Industrial
12: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the
- load-side of the contactor in
- 24 volt secondary side of the Class 2 transformer to the thermostat
- first disconnect in
- breaker panel in
13: All serviceable components of a refrigeration system shall be provided with
- safe access
- service manuals
- name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
- manufactures instructions on start-up procedures
14: 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
- 350
- 250
- 400
15: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- fusible plug
- relief plug
- fusion plug
- rupture plug
16: Halogenated refrigerants cannot be used with what material?
- Magnesium alloy
- Stainless steel
- Aluminum
- Copper
17: 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
18: How many flammability classifications are refrigerants in?
- 3
- 7
- 2
- 5
19: When a refrigerating machinery room is used, the emergency procedures shall be posted
- inside the room, immediately adjacent to each door
- on a conspicuous card located near the compressor
- on a conspicuous card located near the evaporator
- outside the room, immediately adjacent to each door
20: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
21: Refrigeration piping before being buried shall be
- leak tested
- encased in pipe duct
- pressure tested
- All of the above
22: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- Temperature limiter device
- T&P device
- Relief valve
- Circuit Breaker
23: Name three things that must be done when changing refrigeration lubricant?
- Nothing must be done
- You can't change lubricants.
- Place sign, check for leaks, insulate
- Make sure it's compatible, notify owner, notify AHJ
24: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.
- color-coded glass to determine type of refrigerant
- moisture indicators
- automatic closing shut-off valves
- All of the above
25: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
- A group sensing
- refrigerant sensing
- phosgene gas sening
- CO Sensing