Power Engineering - 4B1, 4B2, 4B7 Practice Questions With
Complete Solutions
The crosshead of a steam engine:
a. imparts angular motion to the piston rod
b. never requires any special bearing material
c. does not require any lubrication
d. imparts linear motion to the connecting rod
e. is where linear motion becomes angular motion
e. is where linear motion becomes angular motion
A steam engine piston:
a. is lubricated from the crankcase oil by splash method
b. never requires lubrication
c. moves fastest at the end of its stroke
d. can never have steam applied to either side
e. moves fastest at the beginning of its stroke
e. moves fastest at the beginning of its stroke
The principle cause of steel corrosion in cooling towers is:
a. dissolved carbon dioxide
b. high pH
c. low pH
d. dissolved hydrogen
e. dissolved oxygen
,e. dissolved oxygen
Reaction turbines:
a. are used for high pressure only
b. have a steam velocity increase across the moving blades
c. have a pressure drop through the stationary and moving
blades
d. cannot use counter flow staging
e. do not need a thrust bearing
c. have a pressure drop through the stationary and moving
blades
A routine inspection of an operating steam engine should cover
first and foremost:
a. lubricators
b. engine speed
c. steam quality
d. drive belts
e. steam temperature
a. lubricators
The exhaust steam from a condensing steam turbine _____ than
the exhaust from a steam engine:
a. is hotter
b. is drier
c. has more moisture
,d. has more vapor
e. is more contaminated
c. has more moisture
High discharge water temperature from the cooling tower could
be caused by:
a. fine water spray in the tower
b. low wet bulb air temperature
c. low concentration of solids in the water
d. low dry bulb air temperature
e. high wet bulb air temperature
e. high wet bulb air temperature
The term "prime mover" refers to:
a. steam turbines
b. a single device that either by itself or as part of a system
converts a natural source of energy into motion
c. large steam generators
d. electric motors
e. all heat engines
b. a single device that either by itself or as part of a system
converts a natural source of energy into motion
The first ways to detect a fault in a reciprocating engine is by:
a. oil consumption
b. smell
, c. performance efficiency
d. sound
e. temperature indication
d. sound
Which turbine uses a condenser?
a. a turbine exhausting to atmosphere
b. a non-condensing extraction turbine
c. back pressure turbine
d. a bleeder turbine exhausting at atmospheric pressure
e. a turbine exhausting to a vacuum
e. a turbine exhausting to a vacuum
The average amount of water volume that evaporates from a
cooling tower is:
a. 10%
b. 15%
c. 5%
d. 3.5%
e. 2%
c. 5%
Excessive wind velocity in a natural draft, cooling tower may
cause:
a. under-cooling of the water
b. over-cooling of the water
Complete Solutions
The crosshead of a steam engine:
a. imparts angular motion to the piston rod
b. never requires any special bearing material
c. does not require any lubrication
d. imparts linear motion to the connecting rod
e. is where linear motion becomes angular motion
e. is where linear motion becomes angular motion
A steam engine piston:
a. is lubricated from the crankcase oil by splash method
b. never requires lubrication
c. moves fastest at the end of its stroke
d. can never have steam applied to either side
e. moves fastest at the beginning of its stroke
e. moves fastest at the beginning of its stroke
The principle cause of steel corrosion in cooling towers is:
a. dissolved carbon dioxide
b. high pH
c. low pH
d. dissolved hydrogen
e. dissolved oxygen
,e. dissolved oxygen
Reaction turbines:
a. are used for high pressure only
b. have a steam velocity increase across the moving blades
c. have a pressure drop through the stationary and moving
blades
d. cannot use counter flow staging
e. do not need a thrust bearing
c. have a pressure drop through the stationary and moving
blades
A routine inspection of an operating steam engine should cover
first and foremost:
a. lubricators
b. engine speed
c. steam quality
d. drive belts
e. steam temperature
a. lubricators
The exhaust steam from a condensing steam turbine _____ than
the exhaust from a steam engine:
a. is hotter
b. is drier
c. has more moisture
,d. has more vapor
e. is more contaminated
c. has more moisture
High discharge water temperature from the cooling tower could
be caused by:
a. fine water spray in the tower
b. low wet bulb air temperature
c. low concentration of solids in the water
d. low dry bulb air temperature
e. high wet bulb air temperature
e. high wet bulb air temperature
The term "prime mover" refers to:
a. steam turbines
b. a single device that either by itself or as part of a system
converts a natural source of energy into motion
c. large steam generators
d. electric motors
e. all heat engines
b. a single device that either by itself or as part of a system
converts a natural source of energy into motion
The first ways to detect a fault in a reciprocating engine is by:
a. oil consumption
b. smell
, c. performance efficiency
d. sound
e. temperature indication
d. sound
Which turbine uses a condenser?
a. a turbine exhausting to atmosphere
b. a non-condensing extraction turbine
c. back pressure turbine
d. a bleeder turbine exhausting at atmospheric pressure
e. a turbine exhausting to a vacuum
e. a turbine exhausting to a vacuum
The average amount of water volume that evaporates from a
cooling tower is:
a. 10%
b. 15%
c. 5%
d. 3.5%
e. 2%
c. 5%
Excessive wind velocity in a natural draft, cooling tower may
cause:
a. under-cooling of the water
b. over-cooling of the water
