Topics: ASHRAE/CMR
1: Ammonia belongs to Group
- B-1
- A-2
- A-1
- B-2
2: 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)
- commercial occupancy
- illegal occupancy
- institutional occupancy
- public assembly occupancy
3: Ammonia (NH3) is a group III refrigerant
- True
- False
4: 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.
- “U” or “UM”
- “UV”
- “UM” and “UV”
- “UL”
5: Can ammonia be used on domestic system?
- no, unless there is proper ventilation system installed
- yes
- yes, for systems under 10 tons
- no
6: What would be the classification of a church?
- Large mercantile
- Industrial
- Place of assembly
- Institutional
7: What kind of material can't be used on the outlet of a relief valve?
- PVC
- Aluminum
- Copper
- Stainless Steel
8: Class 3 refrigerants are
- non-flammable
- highly flammable
- toxic
- non-toxic
9: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- the same
- higher
- lower
- there is no Group B1 refrigerants
10: A Low-Probability System
- is such that a leak of refrigerant from a failed connection can not enter the occupied space
- 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
11: What is a Category "D" fluid?
- A typical refrigerant used on newer air conditioning and heat pump ssytems
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
- Any fluid that exceeds 150 psig and has design temperature of over 366F
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
12: Systems containing more than 110 pounds must have stop valves located at the
- compressor suction inlet
- compressor discharge outlet
- receiver inlet and outlet
- All of the above
13: 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.
- 25
- 15
- 20
- 10
14: Halogen refrigerants are corrosive to which type of metal?
- black iron
- magnesium
- stainless steel
- copper
15: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
16: What is a Category "M" fluid?
- Any fluid that exceeds 150 psig and has design temperatures over 366F
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and the designed temperature is between -20F to 366F
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
- A typical refrigerant used on newer air conditioning and heat pump systems
17: What is R-22?
- Chlorodifluoromethane
- Chlorofluoromethane
- HFC
- CCFCM
18: Which refrigerant class listed below is the most flammable?
- B-2
- A-3
- A-1
- C-3
19: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use rupture discs or duel pressure relief valves
- shall use fusible plugs
- shall use pressure relief devices
- shall use pressure relief devices or fusible plugs
20: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- T&P device
- Relief valve
- Circuit Breaker
- Temperature limiter device
21: What happens after your initial inspection of a pressure vessel?
- Inspector leaves a metal tag with a certification listed on it
- There is a temporary shut-down until a final inspection can be performed.
- Notify the AHJ to let them know that the system been inspected
- Notify the Fire Marshal that the system has been inspected and approved
22: R-11 belongs to Group
- B-1
- B-3
- A-1
- A-2
23: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
24: How many flammability classifications are refrigerants in?
- 3
- 5
- 7
- 2
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
- compressor
- evaporator
- outside the machinery room
- boiler