7/12/26, 9:01 AM Z-51 Written Test Exam (Latest Update 2026) UPDATE!! (Recent exam) Fully solved & updated 2026 Most TESTED (2026 Flashca…
Z-51 Written Test Exam (Latest Update 2026)
UPDATE!! (Recent exam) Fully solved & updated
2026 Most TESTED (2026
Save Add to calendar
Terms in this set (149)
In a steam turbine, what is the D) Maintain axial positioning of the rotor shaft.
function of a Kingsbury thrust
bearing?
A) Maintain first stage steam
pressure.
B) Compensate for coupling
misalignment.
C) Adjust shaft torque at start up.
D) Maintain axial positioning of the
rotor shaft.
The ratio of actual pressure of water
pressure in the atmosphere to the
saturated pressure of given
temperature is
A) partial pressure.
B) relative humidity.
C) humidity effect.
D) absolute humidity.
https://quizlet.com/1194301682/z-51-written-test-exam-latest-update-2026-update-recent-exam-fully-solved-updated-2026-most-tested-2026-flash-ca… 1/49
,7/12/26, 9:01 AM Z-51 Written Test Exam (Latest Update 2026) UPDATE!! (Recent exam) Fully solved & updated 2026 Most TESTED (2026 Flashca…
The total amount of heat to be
removed from the refrigerant in a
condenser equals the heat picked up
in the
A) evaporator plus the heat of
compression.
B) evaporator.
C) evaporator plus the heat of
included non-condensable.
D) evaporator less the heat given up
in the muffler.
When must the Fire Department be C) The sprinkler system will be out of service on 1st
notified that a fire protection system and 2nd floors.
is out of service?
A) The manual pull alarm station in
the lobby will be out of service for 4
hours.
B) Four sprinkler heads on a same
floor of your building will be out of
service for 2 hours.
C) The sprinkler system will be out of
service on 1st and 2nd floors.
D) The fire alarm system is out of
service in the refrigerating system
room for g hours.
https://quizlet.com/1194301682/z-51-written-test-exam-latest-update-2026-update-recent-exam-fully-solved-updated-2026-most-tested-2026-flash-ca… 2/49
,7/12/26, 9:01 AM Z-51 Written Test Exam (Latest Update 2026) UPDATE!! (Recent exam) Fully solved & updated 2026 Most TESTED (2026 Flashca…
Hot work authorizations are issued A) a Responsible Person designated by the
by building owner.
A) a Responsible Person designated
by the Building Owner.
B) a Building Department inspector.
C) a FDNY inspector.
D) the Building owner's insurance
company.
Insecticidal fogging operations are C) may be toxic.
hazardous because chemicals
A) are corrosive.
B) are water-reactive.
C) may be toxic.
D) are highly unstable.
What is a compressor safety head?
A) Rupture disc.
B) A pressure relief valve on the low
side.
C) Cylinder head with a low pressure
relief on the high side.
D) A spring on the valve plate.
The oil collected in an oil separator
is generally
A) caused by an oil overcharge.
B) returned to the compressor.
C) filtered and returned to the
compressor.
D) drained and replaced by fresh oil.
https://quizlet.com/1194301682/z-51-written-test-exam-latest-update-2026-update-recent-exam-fully-solved-updated-2026-most-tested-2026-flash-ca… 3/49
, 7/12/26, 9:01 AM Z-51 Written Test Exam (Latest Update 2026) UPDATE!! (Recent exam) Fully solved & updated 2026 Most TESTED (2026 Flashca…
Where is emergency power not D) Data centers.
required according to code?
A) Fire pumps.
B) High rise elevators.
C) Egress illumination.
D) Data centers.
Modern compressors usually seal
the rotating shaft seal as it exits the
compressor housing a spring-loaded
seal made of
A) low-friction plastic.
B) rubber.
C) metal or carbon.
D) graphite-loaded fiber.
A technician shows up to service the D) A S-97/S-98 Certificate of Fitness holder who is
fire alarm panel in your building. employed by a FDNY certified company.
What COF qualifications must he/she
have?
A) A Q-01/Q-99 Certificate of
Qualification holder who is
designated by the building owner.
B) A certified Fire Safety Director
who is designated by the building
owner.
C) A S-95 Certificate of Fitness
holder who is employed by a FDNY
certified company.
D) A S-97/S-98 Certificate of Fitness
holder who is employed by a FDNY
certified company.
https://quizlet.com/1194301682/z-51-written-test-exam-latest-update-2026-update-recent-exam-fully-solved-updated-2026-most-tested-2026-flash-ca… 4/49
Z-51 Written Test Exam (Latest Update 2026)
UPDATE!! (Recent exam) Fully solved & updated
2026 Most TESTED (2026
Save Add to calendar
Terms in this set (149)
In a steam turbine, what is the D) Maintain axial positioning of the rotor shaft.
function of a Kingsbury thrust
bearing?
A) Maintain first stage steam
pressure.
B) Compensate for coupling
misalignment.
C) Adjust shaft torque at start up.
D) Maintain axial positioning of the
rotor shaft.
The ratio of actual pressure of water
pressure in the atmosphere to the
saturated pressure of given
temperature is
A) partial pressure.
B) relative humidity.
C) humidity effect.
D) absolute humidity.
https://quizlet.com/1194301682/z-51-written-test-exam-latest-update-2026-update-recent-exam-fully-solved-updated-2026-most-tested-2026-flash-ca… 1/49
,7/12/26, 9:01 AM Z-51 Written Test Exam (Latest Update 2026) UPDATE!! (Recent exam) Fully solved & updated 2026 Most TESTED (2026 Flashca…
The total amount of heat to be
removed from the refrigerant in a
condenser equals the heat picked up
in the
A) evaporator plus the heat of
compression.
B) evaporator.
C) evaporator plus the heat of
included non-condensable.
D) evaporator less the heat given up
in the muffler.
When must the Fire Department be C) The sprinkler system will be out of service on 1st
notified that a fire protection system and 2nd floors.
is out of service?
A) The manual pull alarm station in
the lobby will be out of service for 4
hours.
B) Four sprinkler heads on a same
floor of your building will be out of
service for 2 hours.
C) The sprinkler system will be out of
service on 1st and 2nd floors.
D) The fire alarm system is out of
service in the refrigerating system
room for g hours.
https://quizlet.com/1194301682/z-51-written-test-exam-latest-update-2026-update-recent-exam-fully-solved-updated-2026-most-tested-2026-flash-ca… 2/49
,7/12/26, 9:01 AM Z-51 Written Test Exam (Latest Update 2026) UPDATE!! (Recent exam) Fully solved & updated 2026 Most TESTED (2026 Flashca…
Hot work authorizations are issued A) a Responsible Person designated by the
by building owner.
A) a Responsible Person designated
by the Building Owner.
B) a Building Department inspector.
C) a FDNY inspector.
D) the Building owner's insurance
company.
Insecticidal fogging operations are C) may be toxic.
hazardous because chemicals
A) are corrosive.
B) are water-reactive.
C) may be toxic.
D) are highly unstable.
What is a compressor safety head?
A) Rupture disc.
B) A pressure relief valve on the low
side.
C) Cylinder head with a low pressure
relief on the high side.
D) A spring on the valve plate.
The oil collected in an oil separator
is generally
A) caused by an oil overcharge.
B) returned to the compressor.
C) filtered and returned to the
compressor.
D) drained and replaced by fresh oil.
https://quizlet.com/1194301682/z-51-written-test-exam-latest-update-2026-update-recent-exam-fully-solved-updated-2026-most-tested-2026-flash-ca… 3/49
, 7/12/26, 9:01 AM Z-51 Written Test Exam (Latest Update 2026) UPDATE!! (Recent exam) Fully solved & updated 2026 Most TESTED (2026 Flashca…
Where is emergency power not D) Data centers.
required according to code?
A) Fire pumps.
B) High rise elevators.
C) Egress illumination.
D) Data centers.
Modern compressors usually seal
the rotating shaft seal as it exits the
compressor housing a spring-loaded
seal made of
A) low-friction plastic.
B) rubber.
C) metal or carbon.
D) graphite-loaded fiber.
A technician shows up to service the D) A S-97/S-98 Certificate of Fitness holder who is
fire alarm panel in your building. employed by a FDNY certified company.
What COF qualifications must he/she
have?
A) A Q-01/Q-99 Certificate of
Qualification holder who is
designated by the building owner.
B) A certified Fire Safety Director
who is designated by the building
owner.
C) A S-95 Certificate of Fitness
holder who is employed by a FDNY
certified company.
D) A S-97/S-98 Certificate of Fitness
holder who is employed by a FDNY
certified company.
https://quizlet.com/1194301682/z-51-written-test-exam-latest-update-2026-update-recent-exam-fully-solved-updated-2026-most-tested-2026-flash-ca… 4/49
