Topics: All categories in the pool
1: Where a refrigeration or air conditioning system is installed,
- The company who installed the system must notify the fire department in the jurisdiction where installed
- it shall not be operated below prescribed pressuers
- A field inspection shall be made before it is put into service
- the form or certificate shall be authorized by the Department of Public Safety
2: A hotel is considered a _______ occupancy.
- commercial
- mercantile
- institutional
- residential
3: Name a reason that does not cause reduced condenser air quantity
- Dirty Coil
- Dirty fan blades
- High ambient temperature
- Prevailing winds
4: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the
- 24 volt secondary side of the Class 2 transformer to the thermostat
- first disconnect in
- load-side of the contactor in
- breaker panel in
5: What is potential measured in?
- Henrys
- Volts
- Ohms
- Amps
6: A halide torch is most useful with a freon compression system
- to sweat flanges on the refrigeration piping
- to release a sticking valve
- to detect refrigeration leaks in piping joints
- to remove from from TXV's and evaporator coils
7: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- public assembly occupancy.
- business occupancy
- commercial occupancy
- mercantile occupancy
8: What is the purpose of suction/discharge traps?
- to ensure proper oil return to the compressor
- to keep oil inside the evaporator for proper oil return to the compressor
- to keep oil inside of the accumulator for proper return to the compressor
- all of the above
9: How are refrigerant blends classified?
- Based on the oil used
- Based on worst case fractionation
- Blends don't have to be classified
- Based on best case Fractionation
10: What must be done to refrigerant pipes before being buried?
- Encased
- Coated
- Leaked checked
- Certified
11: A multi-evaporator refrigeration system uses what type of valve to maintain evaporating temperatures?
- Solenoid valve
- EPR valve
- CPR valve
- EEV
12: A chilled water pump suction gauge reads 10 psig. Discharge gauge reads 48 psig. The head in feet of the pump is working against
- 88
- 38
- 108
- 116
13: The two float-type metering devices are the
- liquid float and the low-side float
- liquid float and the vapor float
- high-side float and the low-side float
- vapor float and the low-side float.
14: On cooling towers, what causes the condenser water to drop
- sensible heat
- tower fans
- evaporation of the water droplets
- ambient temperatures
15: At higher altitudes, boiling temperatures
- increase
- decrease
- are unaffected
- depends on the refrigerant
16: What is the typical air conditioning operating pressures for R-22?
- 60 psi suction 210 psi discharge
- 25 psi suction 125 psi discharge
- 105 psi suction 340 psi discharge
- None of the above
17: Name a CFC refrigerant(s):
- R-11
- R-12
- R-123
- both a & b
18: High side floats are used on centrifugal chiller systems are are considered critically charged systems.
- are obsolete.
- True
- depends on the type of refrigerant being used
- False
19: What must be done to all doors and access points in duct work going through a mechanical room?
- Must be hindged
- Must be screwed shut
- Must be sealed and gasketed
- All of the above
20: Low pressure chiller systems use what type of compressor?
- Reciprocating
- Centrifugal
- Scroll
- Screw
21: On an air cooled condenser, if the ambient air is 35F and dropping, what's its effect to the condensor?
- it would have no effect on the condenser
- it would cause the condenser to sweat
- it would make the condenser less efficient
- it would make the condenser more efficient
22: An azeotropic refrigerant is
- a mixture of two or more refrigerants that boil at about the same temperature minimizing temperature glide.
- a mixture of two or more refrigerants that boil at much different temperatures causing temperature glide
- a mixture of two or more refrigerants that boil at much different temperatures minimizing temperature glide
- none of the above
23: A chilled water pump's suction gauge reads 10 psig. The discharge gauge reads 48 psig. What is the head in feet the pump is working against?
- 88
- 38
- 58
- 96
24: What is used to check very low pressure?
- Manometer
- Velometer
- Hydrometer
- Hygrometer
25: What pipe can not be used for refrigeration?
- N
- L
- M
- K