Topics: ASHRAE/CMR
1: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the
- outside the machinery room
- compressor
- evaporator
- boiler
2: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 660 lbs
- 330 lbs.
- 55 lbs
- 550 lbs
3: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
- 2
- 1
- 5
- 3
4: Who authorizes changes to the safety codes?
- Contractor who last serviced the system.
- Person who pulled the permit
- Person in charge of the facility
- Board of Boilers
5: A restaurant is classified as a
- commercial occupancy
- mixed occupancy
- public assembly occupancy
- large mercantile occupancy
6: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
7: A hotel is considered a _______ occupancy.
- commercial
- mercantile
- residential
- institutional
8: Direct systems using Group II refrigerants
- shall not be used for air condition for human comfort
- shall be allowed to be used for human comfort.
- shall be installed per instruction of the AHJ
- shall be installed in Class T machinery rooms
9: _____ and its alloys are suitable for use with ammonia systems.
- Magnesium
- Aluminum
- Zinc
- Copper
10: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
- R-113
- R-22
- R-12
- R-11
11: The main cause of enacting the "no vending rule" of July 1st 1992 was
- global warming potential
- ozone depletion
- both a & b
- None of the above
12: Class T machine room
- has no flame producing apparatus permanently installed
- shall have remote controls to stop the action of the refrigerant compressor
- shall have refrigerant leak detecting systems installed inside and outside the room
- shall include closets used for setting equipment
13: What type of pressure relief device is used on a CO2 system?
- Rupture disk
- Glove valve
- Fusible plug
- Gate valve
14: What is the minimum size of the discharge pipe?
- Same size as the outlet of the relief valve
- One pipe size larger that the inlet of the relief valve
- Depends on size of manifold
- All of the above
15: Halogen refrigerants are corrosive to which type of metal?
- copper
- black iron
- magnesium
- stainless steel
16: How many refrigerant classifications are there for flammability?
- 1
- 7
- 2
- 3
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 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
19: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 55 lbs
- 660 lbs
- 500 lbs
- 330 lbs
20: Where a refrigeration or air conditioning system is installed,
- it shall not be operated below prescribed pressuers
- A field inspection shall be made before it is put into service
- The company who installed the system must notify the fire department in the jurisdiction where installed
- the form or certificate shall be authorized by the Department of Public Safety
21: Who is permitted to access a refrigeration machine room?
- Any employee
- Contractors only
- Authorized persons only
- Anyone, it's a completely safe area
22: What is R-22?
- Chlorofluoromethane
- Chlorodifluoromethane
- HFC
- CCFCM
23: Halo-carbon refrigerants cannot be used with what material?
- Magnesium alloy
- Aluminum
- Copper
- Stainless Steel
24: All machine rooms must be outfitted with a detector that _______?
- activates an audible alarm
- activates a visual alarm
- starts the ventilation system
- All of the above
25: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- fusion plug
- fusible plug
- relief plug
- rupture plug