Topics: ASHRAE/CMR
1: The Board of Boilers adopts by reference
- MSCA Code
- Montreal Protocol Safety Code
- the 1997 ANSI/ASHRAE Safety Code
- the MACS Pressure Vessel Code of Massachusetts
2: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
- 1
- 2
- 3
- 5
3: Halogen refrigerants are corrosive to which type of metal?
- stainless steel
- magnesium
- black iron
- copper
4: Stop valves shall not be permitted between the system and the
- bleed valve
- relief valve
- condenser
- service valve
5: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 100%
- 80%
- 75%
- 90%
6: Refrigerant restricted in 2004 but used for transition for decades:
- R-123
- R-22
- R-134A
- R-11
7: A Low-Probability 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 a failed connection will enter the occupied space
- is a system highly likely to leak form a failed connection or component of such system
- is such that a leak of refrigerant from a failed connection can not enter the occupied space
8: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UL and UM
- UV or UR
- UM or UL
- UL and UR
9: R-22 is considered a(n)
- HCFC
- CFC
- HFC
- HCFCH
10: 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
11: Trichlorofluoromethane is the name of what refrigerant?
- R-502
- R-12
- R-11
- R-113
12: A restaurant is classified as a
- mixed occupancy
- commercial occupancy
- public assembly occupancy
- large mercantile occupancy
13: _____ and its alloys are suitable for use with ammonia systems.
- Aluminum
- Copper
- Magnesium
- Zinc
14: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 330 lbs.
- 550 lbs
- 660 lbs
- 55 lbs
15: What must be done if refrigeration lines pass through a concrete floor?
- leak checked
- moisture barrier
- insulated
- installed through a pipe casing
16: Name a CFC refrigerant(s):
- R-11
- R-12
- R-123
- both a & b
17: What section governs pressure vessels?
- OSHA
- Section ASHREA 34
- Section 8 ASHREA 15 ASME unfired
- Section 1 ASHREA 15 ASME fired
18: Joints in refrigeration piping must be _____ before being covered?
- Pressurized
- Inspected
- Insulated
- Leak tested
19: 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
- competent welder
- welder qualified
- licensed welder
- licensed technician
20: 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
21: What is a Category "D" fluid?
- A typical refrigerant used on newer air conditioning and heat pump ssytems
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
- Any fluid that exceeds 150 psig and has design temperature of over 366F
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
22: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
23: How much clearance do you need around the perimeter of electrical panels?
- 36"
- 12"
- 18"
- 24"
24: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
25: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c