Topics: All categories in the pool
1: Megaohm meters can detect a ground in the
- 10,000,000 ohms or higher
- up to 1,000 ohms
- up to 10,000 ohms
- up to 1,000,000 ohms
2: The equivalent length of pipe in a water piping system is
- the total length of pipe as you would measure it
- the total length of pipe plus equivalent-length of fittings
- the total length of pipe plus equivalent of fittings multiplied by 2.31
- the total length of pipe as you would measure it plus 25% for fittigns
3: A Lithium-bromide system is an absorption system that
- uses water as a absorbent and lithium bromide as a refrigerant
- uses ammonia as a refrigerant and lithium bromide as an absorbent
- uses salts as an absorbent and lithium bromide as a refrigerant
- uses water as a refrigerant and lithium bromide as an absorbent
4: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 18
- 33
- 50
- 22
5: R-123 belongs to Group
- B-2
- B-3
- A-3
- B-1
6: Absolute pressure is
- Gauge Pressure
- Atmospheric Pressure
- Gauge + Atmospheric Pressure + Pi
- none of the above
7: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
8: All serviceable components of a refrigeration system shall be provided with
- safe access
- service manuals
- name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
- manufactures instructions on start-up procedures
9: "I" represents _______ in the Watt's law formula.
- amperage
- reactance
- watts
- voltage
10: One atmosphere equals
- 0 psia
- 29.4
- 14.7
- 0 psig
11: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 660 lbs
- 330 lbs.
- 55 lbs
- 550 lbs
12: The solution that leaves the concentrator in an absorption chiller is referred to as the
- strong solution
- weak solution
- diluted solution
- absorbed solution
13: What is the minimum size wire you can use on a 30 amp circuit?
- 14 AWG
- 16 AWG
- 12 AWG
- 10 AWG
14: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 330 lbs
- 55 lbs
- 660 lbs
- 500 lbs
15: A motor is rated for 120 volts and has a RLA (rated-load amps) of 5 amps. What is the wattage of the motor?
- 5KW
- 1000 watts
- 746 watts
- 600 watts
16: E = I X R is
- Amps Law
- Impedance Law
- Ohms Law
- Watts Law
17: Liquid line filter-driers on a 410A system must be rated for no less than
- 1000 psig
- 600 psig
- 400 psig
- 200 psig
18: 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
19: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 48
- 18
- 36
- 24
20: How many flammability classifications are refrigerants in?
- 7
- 2
- 3
- 5
21: A High-Probability 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
- 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
22: Suction line oil traps should be installed when the condenser is
- more than 100' away from the evaporator
- in the basement and the evaporator is on the third floor
- located outside the operates in temperatures below 35F
- on the third floor roof and the evaporator is in the basement
23: What is R-22?
- HFC
- Chlorodifluoromethane
- Chlorofluoromethane
- CCFCM
24: Lithium-bromide, Li-Br, is best characterized as a
- salt
- sugar
- soil
- sand
25: Which refrigerant class listed below is the most flammable?
- C3
- B2
- A3
- A2