FDNY Z51 Test Exam Recent Version

FDNY Z51 Test Exam Recent Version Updated with All Questions/ Z51 Written Test Tauris Questions

Question 1: In a steam turbine, what is the function of a

Kingsbury thrust bearing?

• Maintain first stage steam pressure.
• Compensate for coupling misalignment.
• Adjust shaft torque at start up.
• Maintain axial positioning of the rotor shaft.

CORRECT ANSWER: D) Maintain axial positioning of the

rotor shaft.

Question 2: The ratio of actual pressure of water pressure in

the atmosphere to the saturated pressure of given temperature is

• partial pressure.

• relative humidity.
• humidity effect.
• absolute humidity.

CORRECT ANSWER: B) relative humidity.

Question 3: The total amount of heat to be removed from the

refrigerant in a condenser equals the heat picked up in the

• evaporator plus the heat of compression.
• evaporator.
• evaporator plus the heat of included non-condensable.
• evaporator less the heat given up in the muffler.

CORRECT ANSWER: A) evaporator plus the heat of

compression.

Question 4: When must the Fire Department be notified that a

fire protection system is out of service?

• The manual pull alarm station in the lobby will be out of

service for 4 hours.

• Four sprinkler heads on a same floor of your building will

be out of service for 2 hours.

• The sprinkler system will be out of service on 1st and 2nd

floors.

• The fire alarm system is out of service in the refrigerating

system room for g hours.

CORRECT ANSWER: C) The sprinkler system will be out of

service on 1st and 2nd floors.

Question 5: Hot work authorizations are issued by

• a Responsible Person designated by the Building Owner.
• a Building Department inspector.
• a FDNY inspector.
• the Building owner's insurance company.

CORRECT ANSWER: A) a Responsible Person designated

by the building owner.

Question 6: Insecticidal fogging operations are hazardous

because chemicals

• are corrosive.
• are water-reactive.
• may be toxic.
• are highly unstable.

CORRECT ANSWER: C) may be toxic.

Question 7: What is a compressor safety head?

• Rupture disc.
• A pressure relief valve on the low side.
• Cylinder head with a low pressure relief on the high side.
• A spring on the valve plate.