Topics: ASHRAE/CMR
1: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 48
- 24
- 18
- 36
2: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
3: What type of relief valve is used on a CO2 system?
- rupture disc
- glove disc
- gate valve
- fusible plug
4: What does safe access mean?
- OSHA approved
- Well-lit exit signs
- Locked doors
- A clear unobstructed path to the equipment and controls
5: 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 welder
- licensed technician
- competent welder
- welder qualified
6: Stop valves shall not be permitted between the system and the
- relief valve
- service valve
- bleed valve
- condenser
7: Halogen refrigerants are corrosive to which type of metal?
- black iron
- copper
- stainless steel
- magnesium
8: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- public assembly occupancy.
- mercantile occupancy
- business occupancy
- commercial occupancy
9: What must be done to refrigerant pipes before being buried?
- Certified
- Coated
- Leaked checked
- Encased
10: What refrigerant were phased out in 2004?
- R-12
- R-22
- R-134a
- R-11
11: How many gallons of water do you need per pound of ammonia?
- 50
- 10
- 100
- 1
12: High pressure controls should be set no higher than
- 90% of set point
- 80% of set point
- 10% of set point
- 25% of set point
13: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 18
- 10
- 15
- 24
14: Large mercantile occupancy is
- a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
- a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
- a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
15: What is the refrigerant dichlorodifluoromethane?
- R-134A
- R-12
- R-22
- R-123
16: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?
- fusible plug
- relief valve
- rupture disc
- all of the above
17: Pressure vessel having an inside diameter exceeding 6” with an internal pressure greater than 15psig shall be marked directly on or on the nameplate the letters _______________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- “UL”
- “U” or “UM”
- “UM” and “UV”
- “UV”
18: How many refrigerant classifications are there for toxicity?
- 3
- 5
- 1
- 2
19: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
20: How many gallons of water per pound of ammonia do you need?
- 15
- 20
- 1
- 5
21: The gauge thickness required on a CO2 tank construction is
- 5/16"
- 1/8"
- 1/16"
- 3/32"
22: Who authorizes the form of certificate of completion of refrigeration systems that should be used?
- Massachusetts Board of Boiler Rules
- Fire Marshal
- Supervisor or project manager in charge of the installation
- Owner
23: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 22
- 50
- 25
- 66
24: There can be no airflow from an occupied space through a machine room unless what?
- System is high velocity
- System is ducted and sealed
- Duct is not located in the ceiling
- None of the above.
25: 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
- evaporator
- outside the machinery room
- compressor