Topics: All categories in the pool
1: A motor starter is a device that includes an overload and a _______?
- contactor
- 2-pole contacts
- duel-coil
- all of the above
2: What section governs pressure vessels?
- Section ASHREA 34
- Section 8 ASHREA 15 ASME unfired
- Section 1 ASHREA 15 ASME fired
- OSHA
3: Gauge pressure is
- Force of pressure above that of atmosphere
- Absolute pressrue
- Barometric pressure
- Atmospheric pressure
4: There can be no airflow from an occupied space through a machine room unless what?
- System is high velocity
- System is ducted and sealed
- Duct is not located in the ceiling
- None of the above.
5: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 44 lbs
- 6.6 lbs
- 22 lbs
- 13.9 lbs
6: "E" references ____ in the Ohm's law formula
- amperage
- capacitance
- voltage
- resistance
7: 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 as you would measure it plus 25% for fittigns
- the total length of pipe plus equivalent-length of fittings
- the total length of pipe plus equivalent of fittings multiplied by 2.31
8: Ammonia belongs to Group
- A-1
- B-1
- B-2
- A-2
9: In a refrigeration system, you open a valve from the condenser and collect some material on a clean white sheet of bond paper, which of the following would you most likely be testing for?
- checking the level of refrigerant in the system
- testing for oil in the system
- testing for moisture in the system
- none of the above
10: Halo-carbon refrigerants cannot be used with what material?
- Copper
- Aluminum
- Magnesium alloy
- Stainless Steel
11: 1 Watt = ______ BTU's?
- 3.412
- 7.216
- 12
- 4.482
12: When the compressor is below the condensor
- traps are needed on the oil return line
- traps are not needed on this type of system
- traps are needed on the suction line
- traps are needed on the discharge line
13: "R" represents ___ in the Ohm's law formula
- capacitance
- amperage
- resistance
- voltage
14: The heat picked up in the evaporator must equal to
- the heat gained by the condenser
- the heat of compression
- the heat lost by the medium being cooled
- the heat giving by the condenser
15: A declaration test is needed when the system contains more than
- 110 lbs
- 65 lbs
- 120 lbs
- 55 lbs
16: In a system designed for sub-zero ambient temperatures, what must be added?
- Nitrogen
- Infrared dye for leak identification
- Low-ambient kit
- Booster compressor
17: A relief valve discharge capacity is rated in
- PSIA
- PSIG
- Pounds of air per minute.
- temperature minus pounds of air per second divided by release rate squared
18: The start winding has _____ turns than the run winding.
- more
- less
- the same
- none of the above
19: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
20: Fractionation occurs when
- the pressures decreases as the heat load decreases
- the pressures increase as the heat load increases
- some of the blended refrigerant evaporates or condenses before the rest of the blend
- when a fraction of refrigerant is added as the full charge
21: The high side float assembly meters refrigerant into the evaporator through the
- upper chamber of the low side
- lower chamber of the low side
- lower chamber of the high side
- upper chamber of the high side
22: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
- refrigerant sensing
- CO Sensing
- phosgene gas sening
- A group sensing
23: Cooling tower lowers condenser water temp by
- condensation
- running fans at 100%
- evaporative cooling
- running water thru a secondary heat exchanger
24: A movie theater would be considered a
- mixed occupancy
- public assembly occupancy
- commercial occupancy
- institutional occupancy
25: If the compression ratio on a centrifugal compressor rises too high, the compressor will stop pumping and make a loud sound commonly referred to as a
- purge
- merge
- splurge
- surge