Fdny Z-51 Written Test 2025/2026 Exam
Questions with 100% Correct Answers |
Latest Update
In a steam turbine, what is the 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. - 🧠ANSWER ✔✔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.
1
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STATEMENT. ALL RIGHTS RESERVED
,C) humidity effect.
D) absolute humidity. - 🧠ANSWER ✔✔
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. - 🧠ANSWER ✔✔
When must the Fire Department be notified that a fire protection system 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.
2
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
,D) The fire alarm system is out of service in the refrigerating system room
for g hours. - 🧠ANSWER ✔✔C) The sprinkler system will be out of service
on 1st and 2nd floors.
Hot work authorizations are issued by
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. - 🧠ANSWER ✔✔A) a
Responsible Person designated by the building owner.
Insecticidal fogging operations are hazardous because chemicals
A) are corrosive.
B) are water-reactive.
C) may be toxic.
D) are highly unstable. - 🧠ANSWER ✔✔C) may be toxic.
3
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
, 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. - 🧠ANSWER ✔✔
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. - 🧠ANSWER ✔✔
Where is emergency power not required according to code?
A) Fire pumps.
B) High rise elevators.
4
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
Questions with 100% Correct Answers |
Latest Update
In a steam turbine, what is the 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. - 🧠ANSWER ✔✔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.
1
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
,C) humidity effect.
D) absolute humidity. - 🧠ANSWER ✔✔
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. - 🧠ANSWER ✔✔
When must the Fire Department be notified that a fire protection system 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.
2
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
,D) The fire alarm system is out of service in the refrigerating system room
for g hours. - 🧠ANSWER ✔✔C) The sprinkler system will be out of service
on 1st and 2nd floors.
Hot work authorizations are issued by
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. - 🧠ANSWER ✔✔A) a
Responsible Person designated by the building owner.
Insecticidal fogging operations are hazardous because chemicals
A) are corrosive.
B) are water-reactive.
C) may be toxic.
D) are highly unstable. - 🧠ANSWER ✔✔C) may be toxic.
3
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
, 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. - 🧠ANSWER ✔✔
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. - 🧠ANSWER ✔✔
Where is emergency power not required according to code?
A) Fire pumps.
B) High rise elevators.
4
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
