Z-51 WRITTEN TEST | QUESTIONS |
WITH ACTUAL SOLUTIONS!!
1 of 83
Term
Which of the following correctly describes the object in the picture
below?
A) Carbon dioxide system nozzle, to extinguish electrical fires.
B) Cooling tower makeup valve, to put out fires in case of
emergency.
C) Standpipe hose outlet, to put out fires in case of emergency.
D) Water chemistry supply station, for condenser water.
Give this one a try later!
, B) High-side, front-seated and low-
B) Vacuum pump.
side, back-seated.
C) Standpipe hose outlet, to
C) A Q-01 CoF holder. put out fires in case of
emergency.
Don't know?
2 of 83
Term
Which service valve should be installed in a dual pressure release
valve while keeping system in service?
A) Two-way valve.
B) Plug valve.
C) Three-way valve.
D) Stop valve.
Give this one a try later!
B) Artwork in a museum. C) Three-way valve.
D) 2.5 gallons of water weighs 20.8
C) sensible and latent heat.
lbs.
Don't know?
, 3 of 83
Term
A refrigeration compressor has failed to turn on. The refrigeration
engineer on duty verifies that the electrical circuit to the motor,
including all switches and circuit breakers, is complete according to
recommended service practice. The next item to be checked would
likely by the
A) temperature and pressure controls.
B) refrigerant charge.
C) cooling tower operation.
D) liquid-line solenoid valve.
Give this one a try later!
C) Reduce wear and friction in
C) Refrigerant recycling.
compressor parts.
A) temperature and pressure
A) never allowed.
controls.
Don't know?
4 of 83
Term
The suction service valve of a reciprocating compressor is front-
seated and the compressor runs until the low-pressure cut-out shuts
the compressor off. When the machine is off, the refrigeration
, engineer notices that the suction pressure increases rapidly. The
most probable cause of the pressure rise is
A) a leaky suction service valve.
B) a faulty gauge.
C) All answers are correct.
D) the malfunction of a compressor valve.
Give this one a try later!
C) the drip part of the packing
C) Decorations must not be placed
gland gives evidence that there is
to obstruct exits.
water in the pump.
D) Where available to all D) the malfunction of a
employees. compressor valve.
Don't know?
5 of 83
Term
Why are mirrors prohibited to be placed on exit doors?
A) It will be difficult to keep the mirrors clean.
B) The mirrors will cause major obstructions for the first responders.
C) The mirrors will break easily.
D) The mirrors will confuse the direction of exit.
WITH ACTUAL SOLUTIONS!!
1 of 83
Term
Which of the following correctly describes the object in the picture
below?
A) Carbon dioxide system nozzle, to extinguish electrical fires.
B) Cooling tower makeup valve, to put out fires in case of
emergency.
C) Standpipe hose outlet, to put out fires in case of emergency.
D) Water chemistry supply station, for condenser water.
Give this one a try later!
, B) High-side, front-seated and low-
B) Vacuum pump.
side, back-seated.
C) Standpipe hose outlet, to
C) A Q-01 CoF holder. put out fires in case of
emergency.
Don't know?
2 of 83
Term
Which service valve should be installed in a dual pressure release
valve while keeping system in service?
A) Two-way valve.
B) Plug valve.
C) Three-way valve.
D) Stop valve.
Give this one a try later!
B) Artwork in a museum. C) Three-way valve.
D) 2.5 gallons of water weighs 20.8
C) sensible and latent heat.
lbs.
Don't know?
, 3 of 83
Term
A refrigeration compressor has failed to turn on. The refrigeration
engineer on duty verifies that the electrical circuit to the motor,
including all switches and circuit breakers, is complete according to
recommended service practice. The next item to be checked would
likely by the
A) temperature and pressure controls.
B) refrigerant charge.
C) cooling tower operation.
D) liquid-line solenoid valve.
Give this one a try later!
C) Reduce wear and friction in
C) Refrigerant recycling.
compressor parts.
A) temperature and pressure
A) never allowed.
controls.
Don't know?
4 of 83
Term
The suction service valve of a reciprocating compressor is front-
seated and the compressor runs until the low-pressure cut-out shuts
the compressor off. When the machine is off, the refrigeration
, engineer notices that the suction pressure increases rapidly. The
most probable cause of the pressure rise is
A) a leaky suction service valve.
B) a faulty gauge.
C) All answers are correct.
D) the malfunction of a compressor valve.
Give this one a try later!
C) the drip part of the packing
C) Decorations must not be placed
gland gives evidence that there is
to obstruct exits.
water in the pump.
D) Where available to all D) the malfunction of a
employees. compressor valve.
Don't know?
5 of 83
Term
Why are mirrors prohibited to be placed on exit doors?
A) It will be difficult to keep the mirrors clean.
B) The mirrors will cause major obstructions for the first responders.
C) The mirrors will break easily.
D) The mirrors will confuse the direction of exit.
