Topics: ASHRAE/CMR
1: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UV or UR
- UL and UM
- UL and UR
- UM or UL
2: High pressure controls should be set no higher than
- 25% of set point
- 10% of set point
- 80% of set point
- 90% of set point
3: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
- 100
- 1,000
- 10,000
- 100,000
4: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 22 lbs
- 6.6 lbs
- 13.9 lbs
- 44 lbs
5: No open flames are allowed in the machinery room unless?
- Approved by the authorized person
- Never can be allowed
- Approved by the installing contractor
- Only when combustion air is provided from outside of the machinery room
6: A hotel is considered a _______ occupancy.
- institutional
- mercantile
- residential
- commercial
7: What type of pressure relief device is used on a CO2 system?
- Fusible plug
- Gate valve
- Glove valve
- Rupture disk
8: 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
9: Ammonia is under what safety classification?
- B1
- B3
- A3
- B2
10: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into
- the low-pressure side of the system
- the high side of the system
- the liquid receiver
- both a and c are correct
11: 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.
- 250
- 400
- 350
- 100
12: Which occupancy can ammonia be used in?
- commercial
- industrial
- depends on the quantity of freon
- redifential
13: What do you need to do when you install a new system?
- Add refrigerant
- Document the superheat and subcooling reading
- Have it inspected
- Insulate the suction line before you take a superheat reading
14: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by
- District Engineering Inspectors
- Commissioned Inspectors
- Master licensed Technician
- both a or b
15: What kind of material can't be used on the outlet of a relief valve?
- PVC
- Aluminum
- Stainless Steel
- Copper
16: Where must a refrigeration contractor's license number be displayed?
- Trucks, invoices, and advertising
- Trucks, license plates, and uniforms
- Uniforms, checks, and invoices.
- Truck, office, every job, and on all equipment
17: 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
- compressor
- evaporator
- outside the machinery room
18: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.
- True
- False
19: What is an example of institutional occupancy?
- Shopping mall
- Dorms
- Hospital
- Football stadium
20: 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'
21: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
22: Relief valves are rated in
- pounds of air per minute
- gallons of water per hour
- gallons of water per minute
- pounds of air per hour
23: All welding done on any refrigeration system or piping covered by 522 CMR 9.00 shall be performed by a according to Section IX of the ASME code
- licensed technician
- licensed welder
- welder qualified
- competent welder
24: What type of copper is not permitted on refrigeration systems?
- Type L
- Type N
- Type K
- Type M
25: Dual-pressure relief devices should be installed on
- vessels of 3 cubic feet or more
- vessels of 10 cubic feet or more
- vessels of 3 cubic feet or less
- vessels of 10 cubic feet or less