Topics: All categories in the pool
1: The certificate of inspection
- shall be posted and protected from dirt, water, and other elements
- shall be $20 and an additional fee of $1 for each tone above 20 tons
- shall be posted on the compressor shell or electrical panel at the unit
- shall be authorized by a notarized insurance company
2: Where a refrigeration or air conditioning system is 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
- The company who installed the system must notify the fire department in the jurisdiction where installed
3: The gauge thickness required on a CO2 tank construction is
- 1/16"
- 5/16"
- 1/8"
- 3/32"
4: What is the amp draw of a 40 VA transformer at 24 volts
- 106 amps
- 1.6 amps
- 1,000 amps
- 1K amps
5: How many square inches per square foot?
- 144
- 64
- 98
- 24
6: A thermometer inside a duct measures ____ heat.
- latent
- sensible
- specific
- hidden
7: Sublimation occurs when
- liquid is formed from a gas
- ice melts and turns to water
- gas is formed from a liquid
- gas is formed directly from a solid
8: The maximum permissible amperage draw for a 40VA transfomer with a secondary voltage of 24V is
- .1
- 1.7
- 1.2
- .8
9: 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
10: Who authorizes changes to the safety codes?
- Person in charge of the facility
- Contractor who last serviced the system.
- Person who pulled the permit
- Board of Boilers
11: A movie theater would be considered a
- commercial occupancy
- institutional occupancy
- mixed occupancy
- public assembly occupancy
12: The two float-type metering devices are the
- liquid float and the vapor float
- high-side float and the low-side float
- vapor float and the low-side float.
- liquid float and the low-side float
13: A positive displacement compressor is
- a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
- where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
- a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
- is a reciprocating type compressor with 2 or more pistons
14: What is the leaving chilled water set point for water chiller systems?
- 45F
- 55F
- 38F
- 66F
15: A class A3 refrigerant is considered
- toxic and somewhat flammable
- non-toxic and non-flammable
- toxic and non-flammable
- non-toxic but highly flammable
16: In a horizontal shell & tube condenser, the ammonia is liquefied by
- removing the latent heat of fusion
- removing the latent heat of vaporization
- passing thru the tubes from top to bottom
- water sprayed over condenser
17: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.
- True
- False
18: Capacitors are rated in
- volt - amperes
- megaohms
- kelvins
- micro-farads
19: If two 500 ohm resistors are connected in series, the resistance will be
- 20 ohms
- 1000 ohms
- 200 ohms
- 500 ohms
20: Calculate the voltage in a series circuit when the total amperage is 10 amps and the resistors have values of: R1=12 ohms, R2=8 ohms, R3=4 ohms
- 240 volts
- 2.40 volts
- 2,400 volts
- 24.0 volts
21: How many refrigerant classifications are there for flammability?
- 2
- 1
- 7
- 3
22: It takes how many BTU's of latent heat/hr to boil 1 lbs of water into steam?
- 12,000 BTU
- 24,000 BTU
- 144 BTU
- 970 BTU
23: What's the purpose of a megohmmeter?
- To measure low to very low resistance values
- To alternate the current in a DC circuit in order to calculate the total impedance of a circuit
- To measure very high resistances
- None of the above
24: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.
- Lithium bromide
- HCFC-123
- CFC-11
- ammonia
25: R-12 is
- dichlorodifluoromethane
- dichlorofluoromethane
- trichlorofluoromethane
- dichloromethane