HVAC Study Sheet Questions with
Answers Correct!!
What will happen when a steam turbine idles at its critical speed limit? - ANSWERSThe
turbine will vibrate violently
What happens to the steam as it goes through each stage of the turbine? -
ANSWERSSteam pressure drops
What is the purpose of the steam ejectors or a surface condenser? - ANSWERSTo
create a vacuum on the condenser for the steam exhaust.
What is the purpose of the Gland Steam Seal? - ANSWERSTo create positive pressure
and eliminate leakage.
The governor on a steam turbine is used for... - ANSWERSAutomobile speed control
According to NYC Fire Code Classification of refrigerants, ammonia and sulfur dioxide
are grouped into: - ANSWERSGroup 2
A reciprocating system using an evaporative condenser, the muffler is installed between
the: - ANSWERSCompressor and evaporative condenser
Given a refrigeration system which includes a forced draft cooling tower, an economizer
and chilled water as the cooling medium the heat that is removed from the building is
finally rejected: - ANSWERSAs heat of evaporation on the cooling tower
You see the system is cycling normally, but the pressure and temperature is not: -
ANSWERSPoor condenser operating with dirty tubes
Low condensing pressure is not good because - ANSWERSExpansion value will not
feed properly
, What is the purpose of installing a crank case vent line? - ANSWERSPrevent oil
slugging in the compressor
Cylinder unloaders are used for: - ANSWERSControlling capacity
An electric motor is to cut resistors by one half all other factors: - ANSWERSIncreased
by a factor of 2
With respect to fire safety, which Ashrae refrigerant safety classifications is most
dangerous? - ANSWERSA3
How many BTU's would be removed on a 30 ton system? - ANSWERS360,000
BTU/HRS
You have been informed that the temperatures has dropped by 10 degrees celsius. The
temperature in farenheit would be: - ANSWERS18
What is the maximum percentage that the refrigerant can be stored in a cylinder? -
ANSWERS75%
Which refrigerant has the highest boiling point? - ANSWERSR-11
Where is the solenoid value located in between? - ANSWERSSight glass and filter dryer
Of the following, the most correct way to describe a brazed joint is: - ANSWERSGas
tight fitting
Why should you charge with vapor? - ANSWERSPrevent from freezing water in your
tubes.
An inline refrigerant cleaner system is advisable because... - ANSWERSRefrigerant
reacts with lube oil
An automatic oil trap is installed in the high side of a refrigeration system, when the flow
of the trap lifts, it allows the: - ANSWERSOutside to leave the trap and return to the
compressor crank case
While doing a routine inspection, the RMO notices the bulb of the TEV is on the floor
and not strapped on, the operator should place the bulb: - ANSWERSEnd of the coil
A rupture disk on a centrifugal refrigerant machine is normally located on the: -
ANSWERSEvaporator
The most undesirable property in a refrigerant is - ANSWERSLow latent heat
Answers Correct!!
What will happen when a steam turbine idles at its critical speed limit? - ANSWERSThe
turbine will vibrate violently
What happens to the steam as it goes through each stage of the turbine? -
ANSWERSSteam pressure drops
What is the purpose of the steam ejectors or a surface condenser? - ANSWERSTo
create a vacuum on the condenser for the steam exhaust.
What is the purpose of the Gland Steam Seal? - ANSWERSTo create positive pressure
and eliminate leakage.
The governor on a steam turbine is used for... - ANSWERSAutomobile speed control
According to NYC Fire Code Classification of refrigerants, ammonia and sulfur dioxide
are grouped into: - ANSWERSGroup 2
A reciprocating system using an evaporative condenser, the muffler is installed between
the: - ANSWERSCompressor and evaporative condenser
Given a refrigeration system which includes a forced draft cooling tower, an economizer
and chilled water as the cooling medium the heat that is removed from the building is
finally rejected: - ANSWERSAs heat of evaporation on the cooling tower
You see the system is cycling normally, but the pressure and temperature is not: -
ANSWERSPoor condenser operating with dirty tubes
Low condensing pressure is not good because - ANSWERSExpansion value will not
feed properly
, What is the purpose of installing a crank case vent line? - ANSWERSPrevent oil
slugging in the compressor
Cylinder unloaders are used for: - ANSWERSControlling capacity
An electric motor is to cut resistors by one half all other factors: - ANSWERSIncreased
by a factor of 2
With respect to fire safety, which Ashrae refrigerant safety classifications is most
dangerous? - ANSWERSA3
How many BTU's would be removed on a 30 ton system? - ANSWERS360,000
BTU/HRS
You have been informed that the temperatures has dropped by 10 degrees celsius. The
temperature in farenheit would be: - ANSWERS18
What is the maximum percentage that the refrigerant can be stored in a cylinder? -
ANSWERS75%
Which refrigerant has the highest boiling point? - ANSWERSR-11
Where is the solenoid value located in between? - ANSWERSSight glass and filter dryer
Of the following, the most correct way to describe a brazed joint is: - ANSWERSGas
tight fitting
Why should you charge with vapor? - ANSWERSPrevent from freezing water in your
tubes.
An inline refrigerant cleaner system is advisable because... - ANSWERSRefrigerant
reacts with lube oil
An automatic oil trap is installed in the high side of a refrigeration system, when the flow
of the trap lifts, it allows the: - ANSWERSOutside to leave the trap and return to the
compressor crank case
While doing a routine inspection, the RMO notices the bulb of the TEV is on the floor
and not strapped on, the operator should place the bulb: - ANSWERSEnd of the coil
A rupture disk on a centrifugal refrigerant machine is normally located on the: -
ANSWERSEvaporator
The most undesirable property in a refrigerant is - ANSWERSLow latent heat
