Topics: All categories in the pool
1: What does safe access mean?
- OSHA approved
- Locked doors
- Well-lit exit signs
- A clear unobstructed path to the equipment and controls
2: On an air cooled condenser, if the ambient air is 35F and dropping, what's its effect to the condensor?
- it would make the condenser more efficient
- it would make the condenser less efficient
- it would have no effect on the condenser
- it would cause the condenser to sweat
3: When air is ducted through a machine room that services occupied space, What must be done?
- Insulated and cross broke
- Flanged and gasketed
- Welded and seamed.
- Ducted and sealed
4: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.
- 15
- 20
- 50
- 75
5: The discharge relief valve is located (9.4.6)
- between the compressor and reciever
- between the compressor and the stop valve
- on top of the condensor
- between the compressor and oil separator
6: A cross charged power element on an expansion valve would normally be used in what temperature range?
- -40F to 0F
- -100F to -40F
- 0F-38F
- 30F to 50F
7: What section governs pressure vessels?
- Section ASHREA 34
- Section 1 ASHREA 15 ASME fired
- Section 8 ASHREA 15 ASME unfired
- OSHA
8: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- lower
- there is no Group B1 refrigerants
- the same
- higher
9: How are refrigerant blends classified?
- Blends don't have to be classified
- Based on worst case fractionation
- Based on best case Fractionation
- Based on the oil used
10: The solution that is pumped into the concentrator in an absorption chiller is referred to as the
- weak solution
- strong solution
- concentrated solution
- absorbed solution
11: Class T machine room
- shall have remote controls to stop the action of the refrigerant compressor
- shall include closets used for setting equipment
- shall have refrigerant leak detecting systems installed inside and outside the room
- has no flame producing apparatus permanently installed
12: Name a reason that does not cause reduced condenser air quantity
- Dirty fan blades
- High ambient temperature
- Prevailing winds
- Dirty Coil
13: Dew point is
- the temperature below which water vapor in the air will start to evaporate
- the temperature above which water vapor in the air will start to condense
- the temperature of air of 50% RH
- the temperature below which water vapor in the air will start to condense
14: While water is evaporated in an evaporative condenser the impurities which were in the water are
- accumulate in the sump water
- remain in the air
- washed out of the air by the spray pump
- blown to the atmosphere by the fan
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: A professional or office building would be considered what type of occupancy?
- commercial
- business
- mercantile
- public assembly
17: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 600F
- 700F
- 800F
- 1000F
18: Two systems using separate refrigerants that are superimposed upon one another is called
- cascade
- single stage
- booster
- indirect
19: Pressure vessels with an internal volume of 3 cubic feet or more
- shall use pressure relief devices or fusible plugs
- shall use pressure relief devices
- do not need pressure relief protection
- shall use fusible plugs
20: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of
- the aggregate of the high side and low side
- the low side
- the high side
- 2.5 times the design pressure
21: On a ammonia compressor, the pressure of a forced fed oil pump is changed by varying the
- adjustment of the spring tension of the TXV
- cooling temperature set-point
- opening at the pump outlet
- opening at the pump inlet
22: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 80%
- 99%
- 75%
- 90%
23: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above
24: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 22 lbs
- 13.9 lbs
- 6.6 lbs
- 44 lbs
25: Fractionation occurs when
- some of the blended refrigerant evaporates or condenses before the rest of the blend
- the pressures decreases as the heat load decreases
- when a fraction of refrigerant is added as the full charge
- the pressures increase as the heat load increases