Page |1 n n
Z-
51 WRITTEN EXAM 2025| BRAND NEW AC
n n n n n n
TUAL EXAM WITH 100% VERIFIED QUEST n n n n n
IONS AND CORRECT SOLUTIONS| GUARA
n n n n
NTEED VALUE PACK| ACE YOUR GRADES n n n n n
.
In an office building, the display of cut natural trees (Christmas trees) is
n n n n n n n n n n n n
A) never allowed.n
B) allowed provided they are removed once they dry out.
n n n n n n n n
C) always allowed. n
D) allowed during the holiday season. - correct answer - A) never allowed.
n n n n n n n n n n n
Describe the equipment's function in the picture.
n n n n n n
A) Control flow of refrigerant to the compressor.
n n n n n n
B) Remove non-condensable from the condenser.
n n n n
C) Relieve excess pressure from the condenser.
n n n n n
D) Relieve excess pressure from the evaporator. - correct answer -
n n n n n n n n n
B) Remove non-condensable from the condenser.
n n n n n n
, Page |2 n n
When the expansion valve is operating properly, the end of the evaporator wi
n n n n n n n n n n n n
ll contain
n
A) only superheated vapor. n n
B) saturated liquid refrigerant n n
C) only vapor. n
D) only liquid refrigerant. - correct answer - A) only superheated vapor.
n n n n n n n n n n
How much extra refrigerant con be stored in a machine room?
n n n n n n n n n n
A) 330 lbs. n
B) The amount equal to the design pressure.
n n n n n n
C) 20% above normal charge. n n n
D) 220 lbs. - correct answer - C) 20% above normal charge.
n n n n n n n n n n
A refrigeration compressor has failed to turn on. The refrigeration engineer o
n n n n n n n n n n n
n duty verifies that the electrical circuit to the motor, including all switches an
n n n n n n n n n n n n n
d circuit breakers, is complete according to recommended service practice.
n n n n n n n n n n
The next item to be checked would likely by the
n n n n n n n n n
A) temperature and pressure controls. n n n
B) refrigerant charge. n
C) cooling tower operation. n n
D) liquid-line solenoid valve. - correct answer - n n n n n n
A) temperature and pressure controls.
n n n n n
, Page |3 n n
The use of oil in the refrigeration machine is to
n n n n n n n n n
A) Add non-condensates to refrigerant.
n n n
B) Mix the oil with liquid refrigerant.
n n n n n
C) Reduce wear and friction in compressor parts.
n n n n n n
D) None of the answers are correct. - correct answer -
n n n n n n n n n
C) Reduce wear and friction in compressor parts.
n n n n n n n n
The heat removed from the refrigerant condenser is
n n n n n n n
A) latent heat only. n n
B) sensible heat only. n n
C) sensible and latent heat. n n n
D) Radiant heat only. - correct answer - C) sensible and latent heat.
n n n n n n n n n n n
Which service valve should be installed in a dual pressure release valve whil
n n n n n n n n n n n n
e keeping system in service?
n n n n
A) Two-way valve. n
B) Plug valve. n
C) Three-way valve. n
D) Stop valve. - correct answer - C) Three-way valve.
n n n n n n n n
, Page |4 n n
The monthly quick check of a fire extinguisher does NOT include
n n n n n n n n n n
A) Checking the extinguisher for damage. n n n n
B) Confirming its proper location. n n n
C) Discharging the extinguisher. n n
D) Ensuring it is clear from any obstructions. - correct answer -
n n n n n n n n n n
C) Discharging the extinguisher.
n n n n
Several components of a sprinkler system in an office building need to be repaire
n n n n n n n n n n n n n
d. Which of the following are allowed to perform the repair work?
n n n n n n n n n n n
A) A Q-01 refrigeration engineer holding S-12 CoF.
n n n n n n
B) A Master Fire Suppression Contractor holding S-12 CoF.
n n n n n n n
C) Any Master Fire Suppression Piping Contractor.
n n n n n
D) A S-12 CoF holder without any other license. - correct answer -
n n n n n n n n n n n
B) A Master Fire Suppression Contractor holding S-12 CoF.
n n n n n n n n n
A FDNY permit is required to conduct hot work for
n n n n n n n n n
A) brazing.
B) welding.
C) use of oxygen and flammable gas.
n n n n n
Z-
51 WRITTEN EXAM 2025| BRAND NEW AC
n n n n n n
TUAL EXAM WITH 100% VERIFIED QUEST n n n n n
IONS AND CORRECT SOLUTIONS| GUARA
n n n n
NTEED VALUE PACK| ACE YOUR GRADES n n n n n
.
In an office building, the display of cut natural trees (Christmas trees) is
n n n n n n n n n n n n
A) never allowed.n
B) allowed provided they are removed once they dry out.
n n n n n n n n
C) always allowed. n
D) allowed during the holiday season. - correct answer - A) never allowed.
n n n n n n n n n n n
Describe the equipment's function in the picture.
n n n n n n
A) Control flow of refrigerant to the compressor.
n n n n n n
B) Remove non-condensable from the condenser.
n n n n
C) Relieve excess pressure from the condenser.
n n n n n
D) Relieve excess pressure from the evaporator. - correct answer -
n n n n n n n n n
B) Remove non-condensable from the condenser.
n n n n n n
, Page |2 n n
When the expansion valve is operating properly, the end of the evaporator wi
n n n n n n n n n n n n
ll contain
n
A) only superheated vapor. n n
B) saturated liquid refrigerant n n
C) only vapor. n
D) only liquid refrigerant. - correct answer - A) only superheated vapor.
n n n n n n n n n n
How much extra refrigerant con be stored in a machine room?
n n n n n n n n n n
A) 330 lbs. n
B) The amount equal to the design pressure.
n n n n n n
C) 20% above normal charge. n n n
D) 220 lbs. - correct answer - C) 20% above normal charge.
n n n n n n n n n n
A refrigeration compressor has failed to turn on. The refrigeration engineer o
n n n n n n n n n n n
n duty verifies that the electrical circuit to the motor, including all switches an
n n n n n n n n n n n n n
d circuit breakers, is complete according to recommended service practice.
n n n n n n n n n n
The next item to be checked would likely by the
n n n n n n n n n
A) temperature and pressure controls. n n n
B) refrigerant charge. n
C) cooling tower operation. n n
D) liquid-line solenoid valve. - correct answer - n n n n n n
A) temperature and pressure controls.
n n n n n
, Page |3 n n
The use of oil in the refrigeration machine is to
n n n n n n n n n
A) Add non-condensates to refrigerant.
n n n
B) Mix the oil with liquid refrigerant.
n n n n n
C) Reduce wear and friction in compressor parts.
n n n n n n
D) None of the answers are correct. - correct answer -
n n n n n n n n n
C) Reduce wear and friction in compressor parts.
n n n n n n n n
The heat removed from the refrigerant condenser is
n n n n n n n
A) latent heat only. n n
B) sensible heat only. n n
C) sensible and latent heat. n n n
D) Radiant heat only. - correct answer - C) sensible and latent heat.
n n n n n n n n n n n
Which service valve should be installed in a dual pressure release valve whil
n n n n n n n n n n n n
e keeping system in service?
n n n n
A) Two-way valve. n
B) Plug valve. n
C) Three-way valve. n
D) Stop valve. - correct answer - C) Three-way valve.
n n n n n n n n
, Page |4 n n
The monthly quick check of a fire extinguisher does NOT include
n n n n n n n n n n
A) Checking the extinguisher for damage. n n n n
B) Confirming its proper location. n n n
C) Discharging the extinguisher. n n
D) Ensuring it is clear from any obstructions. - correct answer -
n n n n n n n n n n
C) Discharging the extinguisher.
n n n n
Several components of a sprinkler system in an office building need to be repaire
n n n n n n n n n n n n n
d. Which of the following are allowed to perform the repair work?
n n n n n n n n n n n
A) A Q-01 refrigeration engineer holding S-12 CoF.
n n n n n n
B) A Master Fire Suppression Contractor holding S-12 CoF.
n n n n n n n
C) Any Master Fire Suppression Piping Contractor.
n n n n n
D) A S-12 CoF holder without any other license. - correct answer -
n n n n n n n n n n n
B) A Master Fire Suppression Contractor holding S-12 CoF.
n n n n n n n n n
A FDNY permit is required to conduct hot work for
n n n n n n n n n
A) brazing.
B) welding.
C) use of oxygen and flammable gas.
n n n n n
