RMO FINAL EXAM QUESTIONS AND ANSWERS
A standpipe system will be out of service for two days. How long should there be a fire
Watch?
A) The first 24 hours
B) The entire time the standpipe is out of service
C) The first 12 hours
D)The last 12 hours of the day - Answers :The entire time the standpipe is out of
service.
If a sprinkler system is offline for two days how often do you need to inspect it until it is
returned back to service ?
A) Only in the morning not at night until restored
B) Only in the evening not the morning until restored
C) Continuously 24 hours a day until system is restored
D) 12 hours a day until system is restored - Answers :Continuously 24 hours a day until
system is restored
Where is the muffler located?
A) Between the compressor and condenser
B) Between the evaporator and condenser
C) After the condenser
D) Before the compressor - Answers :Between the compressor and the condenser
The most important reason to sub-cool the refrigerant in the condenser is to ensure that
A) Pure liquid refrigerant will enter the metering device
B) Liquid slugs will not enter the compressor
C) The condenser is working efficiently
D) The cooling tower has sufficient water - Answers :Pure liquid refrigerant will enter the
metering device
How do you start a centrifugal chiller
A) Start the chilled water pump, start condenser water pump, start compressor, check
oil, start cooling tower
B) Start the chilled water pump, start condenser water pump, check oil, start
compressor, start cooling tower
C) Start cooling tower, check oil, start compressor, Start the chilled water pump, start
condenser water pump
,D) Start the chilled water pump, start condenser water pump, check oil, start cooling
tower, start compressor - Answers :Start the chilled water pump, start condenser water
pump, check oil, start cooling tower, start compressor
On a steam turbine, what would cause the atmospheric valve to open
A) Low vacuum in the surface condenser
B) Leaking tubes in the surface condenser
C) All answers are correct
D) Dirty tubes in the surface condenser - Answers :All answers are correct
A circuit breaker has a similar function as what
A) Fuse
B) Solenoid
C) Resistor
D) Relay - Answers :Fuse
The suction pressure of a reciprocating compressor is 65 PSIG. The discharge pressure
of this compressor is 120 PSIG. The atmospheric is 14.7 PSI. The compression ratio for
the given condition is closest to.
A) 2.07
B) 4.41
C) 1.69
D) 1.84 - Answers :1.69
Regarding fire safety, which ASHRAE refrigerant safety classification indicates no
flammability and lower toxicity
A) A3
B) A1
C) B1
D) B2 - Answers :B2
The only refrigerant temperature chart available to a refrigerant engineer lists the
temperature in degrees Celsius. If the chart indicates a Celsius temperature of 5
degrees the equivalent in Fahrenheit is
A) 18.4 degrees
B) 39.2 degrees
C) 41 degrees
D) 27 degrees - Answers :41 degrees
C = F-.8
,A technician has been asked to estimate the cost of operating a 5 horsepower motor.
Because the plant is build by energy consumed kilowatt - hours, the technician will have
to calculate the conversion. The equivalent in energy of a 5 horsepower motor operating
9 hours in kilowatt-hours is closet to.
A) 33.6
B) 4.79
C) 3.73
D)11.9 - Answers :33.6
In a building with a multizone standpipe system, how does each zone get supplied with
water?
A) Each zone will be connected to the main water supply
B) It will supply only the highest standpipe zone
C) Each zone will have its own automatic water supply
D) It will supply only the lowest standpipe zone - Answers :Each zone will have its own
automatic water supply
Which service valve should be installed to isolate a dual pressure relief valve while
keeping system in service?
A) Two way valve
B) Three way valve
C) Plug valve
D) Stop valve - Answers :Three way valve
When will the BTU's exchanged be the greatest?
A) High evaporator temperature, low condenser temperature
B) High evaporator temperature, High condenser temperature
C) Low evaporator temperature, low condenser temperature
D) Low evaporator temperature, High condenser temperature - Answers :Low
evaporator temperature, high condenser temperature
Assume that an engineer is able to observe refrigerant, water and oil together. The
fluids would settle in the container from top to bottom
A) Water, oil, refrigerant
B) Oil, refrigerant, water
C) Refrigerant, oil, water
D) Oil, water, refrigerant - Answers :Oil, water, refrigerant
A water chiller system uses refrigerant R123. A leak in the evaporator shell may result
in
, A) A higher-than-normal high side pressure
B) The formation of ice around the point of leakage
C) Low pressure shut down
D) Setting off the refrigerant monitor alarm - Answers :A higher-than-normal high side
pressure
Which of the following best describes how the cylinder unloader works
A) Keep in the suction valve opened while the compressor is in return stroke
B) Controls the clearance volume in the compressor with a solenoid
C) Controls the opening of the passage into the compressor with variable vanes
D) Unloads the piston to create less pressure - Answers :Keep in the suction valve
opened while the compressor is in the return stroke
The type of refrigerant system that is least likely to leak refrigerant into the building
space that are being cooled
A) The direct vented closed system
B) The direct closed system
C) Any system using reciprocating compressor
D) The indirect system - Answers :The indirect system
In the picture below what does the equipment detect
A) Carbon Dioxide
B) Oxygen
C) Halogen
D) Refrigerant leaks - Answers :Refrigerant leaks
There is 7.48 gallons per cubic foot. How many gallons of water are in a pipe 8 feet in
diameter and 10 feet long?
A) 26
B) 80
C) 3758
D) 748 - Answers :3758
The condenser pump is on the first floor and not running. The pressure gauge shows 55
PSI. There is 15 feet for each floor. What floor is the cooling tower on
A) 6
B) 8
C) 10
D) 12 - Answers :8
What is the device used to measure the speed of the turbine
A standpipe system will be out of service for two days. How long should there be a fire
Watch?
A) The first 24 hours
B) The entire time the standpipe is out of service
C) The first 12 hours
D)The last 12 hours of the day - Answers :The entire time the standpipe is out of
service.
If a sprinkler system is offline for two days how often do you need to inspect it until it is
returned back to service ?
A) Only in the morning not at night until restored
B) Only in the evening not the morning until restored
C) Continuously 24 hours a day until system is restored
D) 12 hours a day until system is restored - Answers :Continuously 24 hours a day until
system is restored
Where is the muffler located?
A) Between the compressor and condenser
B) Between the evaporator and condenser
C) After the condenser
D) Before the compressor - Answers :Between the compressor and the condenser
The most important reason to sub-cool the refrigerant in the condenser is to ensure that
A) Pure liquid refrigerant will enter the metering device
B) Liquid slugs will not enter the compressor
C) The condenser is working efficiently
D) The cooling tower has sufficient water - Answers :Pure liquid refrigerant will enter the
metering device
How do you start a centrifugal chiller
A) Start the chilled water pump, start condenser water pump, start compressor, check
oil, start cooling tower
B) Start the chilled water pump, start condenser water pump, check oil, start
compressor, start cooling tower
C) Start cooling tower, check oil, start compressor, Start the chilled water pump, start
condenser water pump
,D) Start the chilled water pump, start condenser water pump, check oil, start cooling
tower, start compressor - Answers :Start the chilled water pump, start condenser water
pump, check oil, start cooling tower, start compressor
On a steam turbine, what would cause the atmospheric valve to open
A) Low vacuum in the surface condenser
B) Leaking tubes in the surface condenser
C) All answers are correct
D) Dirty tubes in the surface condenser - Answers :All answers are correct
A circuit breaker has a similar function as what
A) Fuse
B) Solenoid
C) Resistor
D) Relay - Answers :Fuse
The suction pressure of a reciprocating compressor is 65 PSIG. The discharge pressure
of this compressor is 120 PSIG. The atmospheric is 14.7 PSI. The compression ratio for
the given condition is closest to.
A) 2.07
B) 4.41
C) 1.69
D) 1.84 - Answers :1.69
Regarding fire safety, which ASHRAE refrigerant safety classification indicates no
flammability and lower toxicity
A) A3
B) A1
C) B1
D) B2 - Answers :B2
The only refrigerant temperature chart available to a refrigerant engineer lists the
temperature in degrees Celsius. If the chart indicates a Celsius temperature of 5
degrees the equivalent in Fahrenheit is
A) 18.4 degrees
B) 39.2 degrees
C) 41 degrees
D) 27 degrees - Answers :41 degrees
C = F-.8
,A technician has been asked to estimate the cost of operating a 5 horsepower motor.
Because the plant is build by energy consumed kilowatt - hours, the technician will have
to calculate the conversion. The equivalent in energy of a 5 horsepower motor operating
9 hours in kilowatt-hours is closet to.
A) 33.6
B) 4.79
C) 3.73
D)11.9 - Answers :33.6
In a building with a multizone standpipe system, how does each zone get supplied with
water?
A) Each zone will be connected to the main water supply
B) It will supply only the highest standpipe zone
C) Each zone will have its own automatic water supply
D) It will supply only the lowest standpipe zone - Answers :Each zone will have its own
automatic water supply
Which service valve should be installed to isolate a dual pressure relief valve while
keeping system in service?
A) Two way valve
B) Three way valve
C) Plug valve
D) Stop valve - Answers :Three way valve
When will the BTU's exchanged be the greatest?
A) High evaporator temperature, low condenser temperature
B) High evaporator temperature, High condenser temperature
C) Low evaporator temperature, low condenser temperature
D) Low evaporator temperature, High condenser temperature - Answers :Low
evaporator temperature, high condenser temperature
Assume that an engineer is able to observe refrigerant, water and oil together. The
fluids would settle in the container from top to bottom
A) Water, oil, refrigerant
B) Oil, refrigerant, water
C) Refrigerant, oil, water
D) Oil, water, refrigerant - Answers :Oil, water, refrigerant
A water chiller system uses refrigerant R123. A leak in the evaporator shell may result
in
, A) A higher-than-normal high side pressure
B) The formation of ice around the point of leakage
C) Low pressure shut down
D) Setting off the refrigerant monitor alarm - Answers :A higher-than-normal high side
pressure
Which of the following best describes how the cylinder unloader works
A) Keep in the suction valve opened while the compressor is in return stroke
B) Controls the clearance volume in the compressor with a solenoid
C) Controls the opening of the passage into the compressor with variable vanes
D) Unloads the piston to create less pressure - Answers :Keep in the suction valve
opened while the compressor is in the return stroke
The type of refrigerant system that is least likely to leak refrigerant into the building
space that are being cooled
A) The direct vented closed system
B) The direct closed system
C) Any system using reciprocating compressor
D) The indirect system - Answers :The indirect system
In the picture below what does the equipment detect
A) Carbon Dioxide
B) Oxygen
C) Halogen
D) Refrigerant leaks - Answers :Refrigerant leaks
There is 7.48 gallons per cubic foot. How many gallons of water are in a pipe 8 feet in
diameter and 10 feet long?
A) 26
B) 80
C) 3758
D) 748 - Answers :3758
The condenser pump is on the first floor and not running. The pressure gauge shows 55
PSI. There is 15 feet for each floor. What floor is the cooling tower on
A) 6
B) 8
C) 10
D) 12 - Answers :8
What is the device used to measure the speed of the turbine
