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
- boiler
- outside the machinery room
- evaporator
- compressor
2: Defined process piping by code CMR (528)
- Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
- Any piping in an industrial space
- Any piping in an industrial or commercial space
- All of the above
3: When a refrigeration or air conditioning system is installed
- a field inspection shall be made before it is put into service
- it shall be approved by the owner for proper operation.
- it shall not be operated below prescribed pressures
- the form of certificate shall be authorized by the Department of Pubic safety
4: R-123 belongs to Group
- B-3
- A-3
- B-2
- B-1
5: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- you can't change refrigerants
- place sign, check for leaks, insulate
- nothing must be done
- make sure it's compatible, notify owner, notify A.H.J
6: What is the refrigerant dichlorodifluoromethane?
- R-12
- R-22
- R-134A
- R-123
7: Ammonia (NH3) is a group III refrigerant
- True
- False
8: What type of copper is not permitted on refrigeration systems?
- Type N
- Type M
- Type L
- Type K
9: What must be done if refrigeration lines pass through a concrete floor?
- insulated
- leak checked
- moisture barrier
- installed through a pipe casing
10: What is R-22?
- Chlorodifluoromethane
- Chlorofluoromethane
- HFC
- CCFCM
11: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When there is a space 6' or more above it
- When its white
- When there are sprinklers above
- When it's used as part of a supply or return air system
12: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
13: What type of relief valve is used on a CO2 system?
- gate valve
- fusible plug
- glove disc
- rupture disc
14: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class A machinery room
- Class T machinery room
- Class M machinery room
- Class B machinery room
15: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.
- 15
- 75
- 55
- 50
16: Stop valves shall not be permitted between the system and the
- relief valve
- bleed valve
- service valve
- condenser
17: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- the outdoors
- the return air ducted system
- Machinery rooms need not be vented
- the mechanical room housing the refrigeration system
18: The color code of a tank of ammonia is
- white
- silver
- light green
- lavender
19: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
20: Name an HCFC refrigerant(s):
- R-22
- R-123
- R-11
- both a & b
21: What refrigerant is an inorganic compound?
- R-22
- R-132A
- Ammonia
- R-410A
22: 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
23: R-717 is
- trichloromethane
- ammonia
- water
- carbon dioxide
24: A pressure relief should be located at least _______ from windows and doors.
- 25'
- 30'
- 15'
- 20'
25: Indirect systems using Group II refrigerants
- shall be used for mechanical equipment only
- shall be used in refrigeration system less than 1,000 lbs
- shall be used in refrigeration system in excess of 1,000 lbs
- shall have all refrigerant containing parts except piping, installed in a Class T machine room