Q-01 FDNY Exam Newest /Q-01 FDNY Exam Preparation
Q-01 FDNY EXAM NEWEST /Q-01 FDNY EXAM PREPARATION/Q-
01 FDNY PRACTICE EXAM WITH COMPLETE QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+|BRAND NEW VERSION!!
A reciprocating refrigeration compressor is controlled in response to the water
temperature leaving the water chiller. If the thermostat is used for compressor
control did not have a wide enough differential, the probable result would be
A) inadequate time for oil to return to the compressor
B) stop on high-pressure cutout
C) stop on low-pressure cutout
D) a very long operating cycle - Correct Answer-A) inadequate time for oil to
return to the compressor
Refrigerant recycling is defined as
A) removing the refrigerant from a system and storing it in an external container
with the lowest emissions possible
B) the process of cleaning a refrigerant of dirt and contaminates such as oil, acids,
foreign material and non-condensibles
C) reprocessing a refrigerant into a new product that can be reused in another
system
D) all of the above - Correct Answer-B) the process of cleaning a refrigerant of dirt
and contaminates such as oil, acids, foreign material and non-condensibles
1|Page
, Q-01 FDNY Exam Newest /Q-01 FDNY Exam Preparation
What is one reason why the compressor will short cycle? - Correct Answer-Dirt or
rust stuck under the normally closed solenoid valve (dirty evaporator; clogged
filters)
1-ton of refrigeration equals
__________ btu/day
__________ btu/hour
__________ btu/minute
__________ btu/second - Correct Answer-1) 288,000 btu/day
2) 12,000 btu/hour
3) 200 btu/minute
4) 2.2 btu/second
Who is responsible in a plant to assure refrigerant cylinders are within the
hydrostatic test dates?
A) Operating engineer
B) Plant manager
C) Chief engineer
D) Owner - Correct Answer-D) Owner
If all of the hydrogen atoms have been replaced in the base molecule by chlorine
and fluorine, the refrigerant is said to be
A) fully halogenated
B) partially halogenated
2|Page
, Q-01 FDNY Exam Newest /Q-01 FDNY Exam Preparation
C) hydrochlorofluorocarbon
D) azeotropic - Correct Answer-A) fully halogenated
Butterfly valve - Where can it be used? - Correct Answer-Can be used on the inlet
and outlet of a water pump
Which statement is true concerning Ternary Blends?
A) Leak at faster rates than other refrigerants
B) Leak at uneven amounts due to vapor pressures
C) Leak at even rates
D) Leak on the high side due to high pressure - Correct Answer-B) Leak at uneven
amounts due to vapor pressures
How many pounds of refrigerant can be stored in a machine room if the machine
has 1,000 lbs. in it? - Correct Answer-200
One vertical foot in a riser equals how many psi? - Correct Answer-.433 psi
Sulphur Dioxide —discharged SO2 may be put in a tank of __________ and not be
used for any other purpose - Correct Answer-Absorptive brine
What is the formula for gallons of water in a pipe? - Correct Answer-2.04 x
Diameter2 x length/50
3|Page
, Q-01 FDNY Exam Newest /Q-01 FDNY Exam Preparation
How much ice does a machine rated at 10 tons produce in 24 hours? - Correct
Answer-A little less that 10 tons of ice
How many watts are equal to one horsepower? - Correct Answer-.746 watts
What is the velocity of air in an air duct given the rate of flow: 340 cfm, 4.5 square
foot duct area - Correct Answer-V = Q/A
V = 340/4.5
V = 75.5
How many pounds are in 1-gallon of water? - Correct Answer-8.33 lbs.
The temperature on a wet-bulb thermometer equals the dry-bulb temperature
when
A) the air is below freezing
B) the air is saturated with moisture
C) the air has no moisture
D) this can never happen - Correct Answer-A) the air is below freezing
Carbonate deposits from brine on ice cans can be controlled to a great extent by
A) adding sodium dichromate to the brine
B) increasing the pH to 8 for a period of time
C) adding calcium chloride to the brine solution
4|Page
Q-01 FDNY EXAM NEWEST /Q-01 FDNY EXAM PREPARATION/Q-
01 FDNY PRACTICE EXAM WITH COMPLETE QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+|BRAND NEW VERSION!!
A reciprocating refrigeration compressor is controlled in response to the water
temperature leaving the water chiller. If the thermostat is used for compressor
control did not have a wide enough differential, the probable result would be
A) inadequate time for oil to return to the compressor
B) stop on high-pressure cutout
C) stop on low-pressure cutout
D) a very long operating cycle - Correct Answer-A) inadequate time for oil to
return to the compressor
Refrigerant recycling is defined as
A) removing the refrigerant from a system and storing it in an external container
with the lowest emissions possible
B) the process of cleaning a refrigerant of dirt and contaminates such as oil, acids,
foreign material and non-condensibles
C) reprocessing a refrigerant into a new product that can be reused in another
system
D) all of the above - Correct Answer-B) the process of cleaning a refrigerant of dirt
and contaminates such as oil, acids, foreign material and non-condensibles
1|Page
, Q-01 FDNY Exam Newest /Q-01 FDNY Exam Preparation
What is one reason why the compressor will short cycle? - Correct Answer-Dirt or
rust stuck under the normally closed solenoid valve (dirty evaporator; clogged
filters)
1-ton of refrigeration equals
__________ btu/day
__________ btu/hour
__________ btu/minute
__________ btu/second - Correct Answer-1) 288,000 btu/day
2) 12,000 btu/hour
3) 200 btu/minute
4) 2.2 btu/second
Who is responsible in a plant to assure refrigerant cylinders are within the
hydrostatic test dates?
A) Operating engineer
B) Plant manager
C) Chief engineer
D) Owner - Correct Answer-D) Owner
If all of the hydrogen atoms have been replaced in the base molecule by chlorine
and fluorine, the refrigerant is said to be
A) fully halogenated
B) partially halogenated
2|Page
, Q-01 FDNY Exam Newest /Q-01 FDNY Exam Preparation
C) hydrochlorofluorocarbon
D) azeotropic - Correct Answer-A) fully halogenated
Butterfly valve - Where can it be used? - Correct Answer-Can be used on the inlet
and outlet of a water pump
Which statement is true concerning Ternary Blends?
A) Leak at faster rates than other refrigerants
B) Leak at uneven amounts due to vapor pressures
C) Leak at even rates
D) Leak on the high side due to high pressure - Correct Answer-B) Leak at uneven
amounts due to vapor pressures
How many pounds of refrigerant can be stored in a machine room if the machine
has 1,000 lbs. in it? - Correct Answer-200
One vertical foot in a riser equals how many psi? - Correct Answer-.433 psi
Sulphur Dioxide —discharged SO2 may be put in a tank of __________ and not be
used for any other purpose - Correct Answer-Absorptive brine
What is the formula for gallons of water in a pipe? - Correct Answer-2.04 x
Diameter2 x length/50
3|Page
, Q-01 FDNY Exam Newest /Q-01 FDNY Exam Preparation
How much ice does a machine rated at 10 tons produce in 24 hours? - Correct
Answer-A little less that 10 tons of ice
How many watts are equal to one horsepower? - Correct Answer-.746 watts
What is the velocity of air in an air duct given the rate of flow: 340 cfm, 4.5 square
foot duct area - Correct Answer-V = Q/A
V = 340/4.5
V = 75.5
How many pounds are in 1-gallon of water? - Correct Answer-8.33 lbs.
The temperature on a wet-bulb thermometer equals the dry-bulb temperature
when
A) the air is below freezing
B) the air is saturated with moisture
C) the air has no moisture
D) this can never happen - Correct Answer-A) the air is below freezing
Carbonate deposits from brine on ice cans can be controlled to a great extent by
A) adding sodium dichromate to the brine
B) increasing the pH to 8 for a period of time
C) adding calcium chloride to the brine solution
4|Page
