ABSA 3B2 UPDATED ACTUAL Questions
and CORRECT Answers
What can not be used to to control an overspeed trip - CORRECT ANSWER - Pneumatic
What refrigerants are most commonly used in an absorption refrigeration system - CORRECT
ANSWER - ammonia and water
Where is the flare pit located in an industrial wastewater treatment plant - CORRECT
ANSWER - oil/water separation pit
What are 2 common fired heaters - CORRECT ANSWER - indirect and direct
What is the value of a convgerent nozzle inlet - CORRECT ANSWER - 0.577
What type of turbines use the exhaust steam for a process after the fact - CORRECT
ANSWER - non condensing/back pressure turbine
Purpose of a dummy piston on a steam turbine - CORRECT ANSWER - exert a thrust
force on the piston ion the opposite direction to normal thrust force
Purpose of a turning gear - CORRECT ANSWER - prevent hogging
Speed sensitive governors - CORRECT ANSWER - mechanical
mechanical hydraulic
electric hydraulic
What would cause an overspeed to activate ... - CORRECT ANSWER -
, What happens when an overspeed trip activates - CORRECT ANSWER - steam supply
inlet closes
Most efficient coolant for refrigerant - CORRECT ANSWER - water cooling
Condenser safety devices - CORRECT ANSWER - atmospheric relief device and high
water level
In a reaction turbine stationary blade what occurs - CORRECT ANSWER - velocity
increases
Pressure drops
In a reaction turbine when the steam from the station blade is admitted too the moving blade
what force does the steam exert - CORRECT ANSWER - impulse force on the blade and
blade shape creates a reaction force
What is the main purpose of a thrust bearing - CORRECT ANSWER - absorb axial thrust
What types of oils system does a medium sized turbine - CORRECT ANSWER - ring
oiled and circulating oil system
What type of oil system does a large turbine have - CORRECT ANSWER - oil circulating
systems that supply lube oil to the turbine bearings, the bearings of the driven machine and the
reducing gear
When a turbine is stopped what is turned on - CORRECT ANSWER - barring gear or aux
oil pump
What type of governor Is used when a governor is attached to the turbine shaft - CORRECT
ANSWER - speed sensitive
and CORRECT Answers
What can not be used to to control an overspeed trip - CORRECT ANSWER - Pneumatic
What refrigerants are most commonly used in an absorption refrigeration system - CORRECT
ANSWER - ammonia and water
Where is the flare pit located in an industrial wastewater treatment plant - CORRECT
ANSWER - oil/water separation pit
What are 2 common fired heaters - CORRECT ANSWER - indirect and direct
What is the value of a convgerent nozzle inlet - CORRECT ANSWER - 0.577
What type of turbines use the exhaust steam for a process after the fact - CORRECT
ANSWER - non condensing/back pressure turbine
Purpose of a dummy piston on a steam turbine - CORRECT ANSWER - exert a thrust
force on the piston ion the opposite direction to normal thrust force
Purpose of a turning gear - CORRECT ANSWER - prevent hogging
Speed sensitive governors - CORRECT ANSWER - mechanical
mechanical hydraulic
electric hydraulic
What would cause an overspeed to activate ... - CORRECT ANSWER -
, What happens when an overspeed trip activates - CORRECT ANSWER - steam supply
inlet closes
Most efficient coolant for refrigerant - CORRECT ANSWER - water cooling
Condenser safety devices - CORRECT ANSWER - atmospheric relief device and high
water level
In a reaction turbine stationary blade what occurs - CORRECT ANSWER - velocity
increases
Pressure drops
In a reaction turbine when the steam from the station blade is admitted too the moving blade
what force does the steam exert - CORRECT ANSWER - impulse force on the blade and
blade shape creates a reaction force
What is the main purpose of a thrust bearing - CORRECT ANSWER - absorb axial thrust
What types of oils system does a medium sized turbine - CORRECT ANSWER - ring
oiled and circulating oil system
What type of oil system does a large turbine have - CORRECT ANSWER - oil circulating
systems that supply lube oil to the turbine bearings, the bearings of the driven machine and the
reducing gear
When a turbine is stopped what is turned on - CORRECT ANSWER - barring gear or aux
oil pump
What type of governor Is used when a governor is attached to the turbine shaft - CORRECT
ANSWER - speed sensitive
