Topics: ASHRAE/CMR
1: Relief valves are rated in
- pounds of air per hour
- pounds of air per minute
- gallons of water per minute
- gallons of water per hour
2: What kind of material can't be used on the outlet of a relief valve?
- Copper
- Stainless Steel
- PVC
- Aluminum
3: Ammonia can come in contact with _______ ?
- Brass
- Aluminum
- Copper tubing
- Copper
4: A movie theater would be considered a
- institutional occupancy
- commercial occupancy
- public assembly occupancy
- mixed occupancy
5: Where must a refrigeration contractor's license number be displayed?
- Trucks, invoices, and advertising
- Uniforms, checks, and invoices.
- Trucks, license plates, and uniforms
- Truck, office, every job, and on all equipment
6: A pressure relief should be located at least _______ from windows and doors.
- 15'
- 20'
- 30'
- 25'
7: A High-Probablity system
- is a system highly likely to leak from a failed connection or component of such system
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is such that a leak of refrigerant from failed connections will enter the unoccupied space
- is such that a leak of refrigerant from failed connections will enter the occupied space
8: 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
9: Pipe identification labels are required when the system contains more than
- 110 lbs
- 55 lbs
- 120 lbs
- 65 lbs
10: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 18
- 22
- 50
- 33
11: 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
12: Halo-carbon refrigerants cannot be used with what material?
- Magnesium alloy
- Stainless Steel
- Copper
- Aluminum
13: The Board of Boilers adopts by reference
- Montreal Protocol Safety Code
- the MACS Pressure Vessel Code of Massachusetts
- the 1997 ANSI/ASHRAE Safety Code
- MSCA Code
14: 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
- breaker panel in
- first disconnect in
- 24 volt secondary side of the Class 2 transformer to the thermostat
15: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?
- R-718 is not rated unlimited because it's a dangerous refrigerant
- Because it's a non-flammable refrigerant
- Because it's water
- Because it's cheap
16: Name an HCFC refrigerant(s):
- R-22
- R-123
- R-11
- both a & b
17: All electrical work done on refrigeration systems must comply with
- OSHA
- Department of Energy
- NEC and Massachusetts Modifications
- ASHREA-15 Section 9.2.1
18: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UM or UL
- UV or UR
- UL and UR
- UL and UM
19: Ammonia belongs to Group
- B-2
- A-2
- B-1
- A-1
20: 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
21: Evaporators within 18" of a heating coil must be equipped with a
- high limit control
- low limit control
- pressure relief device
- zone valve
22: What does safe access mean?
- A clear unobstructed path to the equipment and controls
- Locked doors
- OSHA approved
- Well-lit exit signs
23: A class A3 refrigerant is considered
- non-toxic but highly flammable
- non-toxic and non-flammable
- toxic and non-flammable
- toxic and somewhat flammable
24: Which of the following is an inorganic refrigerant?
- R-22
- Ammonia
- Chlorofluorocarbons
- All of the above
25: What do you need to do when you install a new system?
- Have it inspected
- Document the superheat and subcooling reading
- Insulate the suction line before you take a superheat reading
- Add refrigerant