Topics: ASHRAE/CMR
1: Who approves containers for refrigerants?
- E.P.A
- D.O.E
- D.O.T
- D.O.D
2: A Category D fluid
- is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
- is when the design pressure does not exceed 150 psi
- a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
- Both a and b are correct
3: R-11 belongs to Group
- B-1
- B-3
- A-1
- A-2
4: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)
- institutional occupancy
- commercial occupancy
- public assembly occupancy
- illegal occupancy
5: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
- of Group B2 refrigerant shall be prohibited
- shall not be prohibited
- shall be prohibited
- containing R-11, R-123 & R-717 exclusively shall not be prohibited
6: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above
7: 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
8: Evaporators within 18" of a heating coil must be equipped with a
- low limit control
- high limit control
- pressure relief device
- zone valve
9: NH3 is
- R-718
- ammonia
- R-508A
- lithium bromide
10: Institutional occupancy is
- a premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space.
- a premise or that portion of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others.
- a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
- None of the above
11: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c
12: 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.
- HCFC-123
- Lithium bromide
- CFC-11
- ammonia
13: Refrigeration piping before being buried shall be
- leak tested
- encased in pipe duct
- pressure tested
- All of the above
14: 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.
15: Fusible plugs shall not be used with pressure vessels of
- 3 cubic feet or more
- 15 cubic feet or more
- 15 square feet or less
- 3 cubic feet or less
16: 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
17: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.
- 15
- 20
- 25
- 10
18: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 800F
- 1000F
- 700F
- 600F
19: How many groups of refrigerants are there?
- 7
- 5
- 1
- 3
20: How many different groups of refrigerants are there?
- 11
- 15
- 7
- 3
21: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 500 lbs
- 55 lbs
- 660 lbs
- 330 lbs
22: Which refrigerant class listed below is the most flammable?
- C-3
- A-1
- A-3
- B-2
23: Relief valves are rated in
- pounds of air per hour
- pounds of air per minute
- gallons of water per hour
- gallons of water per minute
24: Pipe identification labels are required when the system contains more than
- 55 lbs
- 65 lbs
- 120 lbs
- 110 lbs
25: A High-Probablity system
- is such that a leak of refrigerant from failed connections will enter the unoccupied space
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is a system highly likely to leak from a failed connection or component of such system
- is such that a leak of refrigerant from failed connections will enter the occupied space