Topics: ASHRAE/CMR
1: How many gallons of water do you need per pound of ammonia?
- 10
- 50
- 100
- 1
2: Indirect systems using Group II refrigerants
- shall have all refrigerant containing parts except piping, installed in a Class T machine room
- shall be used for mechanical equipment only
- shall be used in refrigeration system in excess of 1,000 lbs
- shall be used in refrigeration system less than 1,000 lbs
3: A High-Probability System
- 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 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 an unoccupied space
4: How many refrigerant classifications are there for toxicity?
- 1
- 5
- 2
- 3
5: Where must a refrigeration contractor's license number be displayed?
- Uniforms, checks, and invoices.
- Trucks, invoices, and advertising
- Trucks, license plates, and uniforms
- Truck, office, every job, and on all equipment
6: How are refrigerant blends classified?
- Based on worst case fractionation
- Blends don't have to be classified
- Based on the oil used
- Based on best case Fractionation
7: Evaporators within 18" of a heating coil must be equipped with a
- low limit control
- high limit control
- pressure relief device
- zone valve
8: How many groups of refrigerants are there?
- 7
- 5
- 1
- 3
9: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
10: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 22
- 66
- 50
- 25
11: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Magnesium
- Nickel
- Copper
- Zinc
12: A relief valve discharge capacity is rated in
- temperature minus pounds of air per second divided by release rate squared
- Pounds of air per minute.
- PSIA
- PSIG
13: Whoever owns/uses a refrigeration or air conditioning system covered by this code
- must notify the Department of Public Safety prior to starting the system
- shall be licensed by the Commonwealth of Massachusetts according to CMR 522
- shall make application for inspections to the Chief of Inspectors
- None of the above
14: Refrigerants shall be classified by
- color codes
- toxicity and flammability
- maximum permissible quantities of each group
- requirements for commercial, industrial, and residential occupancies
15: 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
16: The discharge relief valve is located (9.4.6)
- on top of the condensor
- between the compressor and the stop valve
- between the compressor and reciever
- between the compressor and oil separator
17: All serviceable components of a refrigeration system shall be provided with
- name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
- service manuals
- safe access
- manufactures instructions on start-up procedures
18: Which refrigerant class listed below is the most flammable?
- C-3
- A-1
- A-3
- B-2
19: What is the minimum height refrigeration piping should be placed against walls?
- 6'
- 7.25'
- Ceiling height
- 72"
20: What is a Category "D" fluid?
- 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
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
- A typical refrigerant used on newer air conditioning and heat pump ssytems
21: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 50
- 18
- 33
- 22
22: What refrigerant doesn't have to be classifted?
- R-711
- R-134a
- R-717
- R-718
23: Trichlorofluoromethane is the name of what refrigerant?
- R-502
- R-12
- R-11
- R-113
24: What is an example of institutional occupancy?
- Shopping mall
- Football stadium
- Dorms
- Hospital
25: Pressure vessels with an internal volume of 3 cubic feet or more
- shall use pressure relief devices
- do not need pressure relief protection
- shall use pressure relief devices or fusible plugs
- shall use fusible plugs