Topics: ASHRAE/CMR
1: Where must a refrigeration contractor's license number be displayed?
- Uniforms, checks, and invoices.
- Truck, office, every job, and on all equipment
- Trucks, invoices, and advertising
- Trucks, license plates, and uniforms
2: Ammonia can come in contact with _______ ?
- Copper
- Aluminum
- Brass
- Copper tubing
3: Dual-pressure relief devices should be installed on
- vessels of 10 cubic feet or more
- vessels of 3 cubic feet or less
- vessels of 3 cubic feet or more
- vessels of 10 cubic feet or less
4: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
- True
- False
5: How many gallons of water per pound of ammonia do you need?
- 5
- 15
- 1
- 20
6: _____ and its alloys are suitable for use with ammonia systems.
- Copper
- Aluminum
- Zinc
- Magnesium
7: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
8: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- the return air ducted system
- the mechanical room housing the refrigeration system
- Machinery rooms need not be vented
- the outdoors
9: How many different groups of refrigerants are there?
- 3
- 7
- 11
- 15
10: Which occupancy can ammonia be used in?
- industrial
- redifential
- depends on the quantity of freon
- commercial
11: 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
- welder qualified
- licensed technician
- competent welder
- licensed welder
12: Pressure vessels nameplate markings must be compliant with the
- ASHRAE 34 Standards
- CMR-588 & CMR-528
- ASME Boiler and Pressure Vessel Code
- All of the Above
13: Pressure relief valves shall be marked with the data from
- Section VIII Division of the ASME Boiler & Pressure Code
- Section XIII Division of the ASME Boiler & Pressure Code
- Section IV Division of the ASME Boiler & Pressure Code
- Section I Division VIII of ASME Boiler & Pressure Code
14: How much clearance do you need around the perimeter of electrical panels?
- 24"
- 18"
- 12"
- 36"
15: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
16: How many flammability classifications are refrigerants in?
- 7
- 5
- 3
- 2
17: No open flames are allowed in the machinery room unless?
- Never can be allowed
- Approved by the authorized person
- Approved by the installing contractor
- Only when combustion air is provided from outside of the machinery room
18: A pressure relief should be located at least _______ from windows and doors.
- 30'
- 20'
- 15'
- 25'
19: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.
- CFC-11
- HCFC-123
- ammonia
- Lithium bromide
20: What refrigerant were phased out in 2004?
- R-11
- R-134a
- R-12
- R-22
21: Ammonia (NH3) is a group III refrigerant
- True
- False
22: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.
- the atmosphere
- a de-pressurized recovery tank with a silver top and yellow bottom
- a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
- All of the above
23: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
24: How are refrigerant blends classified?
- Based on best case Fractionation
- Blends don't have to be classified
- Based on worst case fractionation
- Based on the oil used
25: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use rupture discs or duel pressure relief valves
- shall use pressure relief devices or fusible plugs
- shall use fusible plugs
- shall use pressure relief devices