Topics: All categories in the pool
1: If the spring is adjusted to increase the superheat, this new setting will
- shorten the frost line
- allow more liquid into the evaporator
- have no effect on the frost line
- lengthen the frost line
2: Class A refrigerants are considered
- flammable
- non-toxic
- toxic
- non-flammable
3: Which winding have the most turns?
- Start
- they have equal amount of turns
- run
- depends on the motor phase
4: Heat is a form of
- energy
- power
- matter
- work
5: A motor is rated for 120 volts and has a RLA (rated-load amps) of 5 amps. What is the wattage of the motor?
- 746 watts
- 600 watts
- 5KW
- 1000 watts
6: A restaurant is classified as a
- commercial occupancy
- mixed occupancy
- public assembly occupancy
- large mercantile occupancy
7: A single pole-double throw switch used how many wires excluding the ground wire?
- four
- three
- two
- five
8: What would be the classification of a prison?
- Institutional
- Large mercantile
- Place of assembly
- Industrial
9: Ammonia belongs to Group
- B-1
- A-2
- A-1
- B-2
10: Class T machine room
- shall include closets used for setting equipment
- shall have refrigerant leak detecting systems installed inside and outside the room
- has no flame producing apparatus permanently installed
- shall have remote controls to stop the action of the refrigerant compressor
11: What device removes the start winding from the circuit of a split-phase motor once the motor reaches 75% of its rated load amps (RLA)?
- motor starter
- printed circuit board (PCB)
- duel-voltage switch
- centrifugal switch
12: "E" references ____ in the Ohm's law formula
- amperage
- voltage
- capacitance
- resistance
13: Pairs of mating stop valves that allow sections of a system to be joined before opening these valves or separated after closing them are
- ball valves
- gate or globe valves
- king valves
- companion or block valves
14: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 13.9 lbs
- 6.6 lbs
- 44 lbs
- 22 lbs
15: The maximum permissible amperage draw for a 40VA transfomer with a secondary voltage of 24V is
- .8
- 1.7
- .1
- 1.2
16: How many flammability classifications are refrigerants in?
- 5
- 7
- 2
- 3
17: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into
- the low-pressure side of the system
- the high side of the system
- the liquid receiver
- both a and c are correct
18: The solution that leaves the concentrator in an absorption chiller is referred to as the
- absorbed solution
- weak solution
- strong solution
- diluted solution
19: The level of voltage caused by back electromagnetic force that opens the contacts of a potential relay in order to take the start capacitor out of the circuit is
- run voltage
- pick up voltage
- boost voltage
- lift voltage
20: "R" represents ___ in the Ohm's law formula
- resistance
- amperage
- voltage
- capacitance
21: What is a Category "D" fluid?
- A typical refrigerant used on newer air conditioning and heat pump ssytems
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
- Any fluid that exceeds 150 psig and has design temperature of over 366F
22: Brazed joints melt at temperatures above
- 800F
- 500F
- 1,000F
- 1,200F
23: 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.
- 50
- 100
- 24
- 75
24: A mixed occupancy occurs when two or more occupancies are located with the same building
- true
- false
25: A Category D fluid
- is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
- is when the design pressure does not exceed 150 psi
- a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
- Both a and b are correct