Topics: All categories in the pool
1: 1 HP = ____ Watts?
- 3,412
- 746
- 11,239
- 3.1416
2: Gauge pressure is
- atmospheric pressure
- absolute pressure
- force of pressure above that of atmospheric
- what a gauge reads when checking pressures on a chilled water system.
3: The freezing point of water at sea level is?
- -10C
- 32F
- 32C
- 0F
4: What was the main reason for enacting the no venting rule of July 1, 1992?
- Ozone depletion
- Green house effect
- Global warming potential
- All of the above
5: One atmosphere equals
- 0 psia
- 14.7
- 0 psig
- 29.4
6: Which of the following is not an air velocity meter?
- Hydrometer
- Anemometer
- Velometer
- Anemotherm
7: Oils, classified as to source, are
- animal, vegetable, and castor
- naphthalene, paraffin, and castor
- animal, vegetable, and mineral
- naphthalene, mixed, and paraffin
8: On a TXV, the purpose of an external equalizer is to?
- balance the evaporator load
- Increase the pressure on the top of the power head diaphragm
- allow a greater adjustment spam
- compensate for a pressure drop across the evaporator coil
9: What would be the classification of a church?
- Industrial
- Large mercantile
- Place of assembly
- Institutional
10: Which of the following most closely represents the concentration of Li-Br in a absorption system?
- 40% Li-Br, 60% distilled water
- 50% Li-Br, 50% tap water
- 40% Li-Br, 60% tap water
- 60% Li-Br, 40% distilled water
11: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by
- District Engineering Inspectors
- Commissioned Inspectors
- Master licensed Technician
- both a or b
12: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
13: "P" represents ______ in the Watt's law formula
- reactance
- amperage
- watts
- voltage
14: If the suction pressure is low and the evaporator temperature high, the cause will be a?
- starved evaporator
- overcharged
- compressor suction valve stuck open
- too small evaporator
15: What refrigerant is an inorganic compound?
- R-22
- Ammonia
- R-132A
- R-410A
16: Starting relays for a single phase compressors are used to remove the starting circuit from operation when the motor reaches approximately ____ percent of its speed.
- 100
- 75
- 24
- 50
17: The proper location for an oil separator is between the
- compressor and condenser
- condenser and receiver
- evaporator and compressor
- receiver and metering device
18: Which refrigerant class listed below is the most flammable?
- B2
- A3
- A2
- C3
19: Absolute pressure is
- Gauge Pressure
- Atmospheric Pressure
- Gauge + Atmospheric Pressure + Pi
- none of the above
20: Heat is a form of
- power
- work
- matter
- energy
21: When can recovered refrigerants be reused?
- They can't
- Only when used in original owner's equipment
- Only if used in 30 days of recovery
- None of the above
22: The high side float assembly meters refrigerant into the evaporator through the
- upper chamber of the low side
- lower chamber of the high side
- lower chamber of the low side
- upper chamber of the high side
23: The color code of a tank of ammonia is
- lavender
- white
- light green
- silver
24: Suction line oil traps should be installed when the condenser is
- more than 100' away from the evaporator
- located outside the operates in temperatures below 35F
- in the basement and the evaporator is on the third floor
- on the third floor roof and the evaporator is in the basement
25: 746 watts is equal to
- 10 hp
- 1 hp
- 100 hp
- Pi