Power Engineering 3B2 Chapter 1 Questions With Complete
Solutions
_____ turbines are large turbines consisting of two or more
turbines in series coupled together as one shaft and applied to
one generator.
a. Topping.
b. Tandem-compound.
c. Condensing-bleeder.
d. Cross-compound.
e. Mixed pressure. Correct Answers b
_____ turbines are large turbines with parallel shafts with a
generator on each shaft.
a. Condensing.
b. Tandem-compound.
c. Extraction-bleeder.
d. Condensing-bleeder.
e. Cross-compound. Correct Answers e
A back-pressure turbine with exhaust steam going to an old
boiler header that is supplying steam to an old lower pressure
turbine is called a:
a. Condensing-bleeder turbine.
b. Cross compound turbine.
c. Condensing turbine.
d. Topping turbine.
e. Mixed pressure turbine. Correct Answers d
A condensing-bleeder turbine can bleed up to _____ of the total
steam flow.
,a. 1%
b. 15%
c. 2%
d. 10%
e. 5%. Correct Answers c
A dummy piston on a steam turbine is used to:
a. Counter vibration and ensure a smooth running unit.
b. Increase turbine output.
c. Measure axial position.
d. Counter end thrust.
e. Provide an area to install a labyrinth deal. Correct Answers d
A generator coupled on one shaft to a turbine consisting of two
or more turbine in series is called a:
a. Condensing-bleeder.
b. Cross-compound turbine.
c. Mixed pressure.
d. Tandem-compound turbine.
e. Topping. Correct Answers d
A hollow drum rotor, for good balance, is machined both outside
and inside thus the drum must be open at one end. How is the
drum end cover with shaft installed in the rotor?
a. Press fitted.
b. Welded on.
c. Bolted.
d. Press fitted and welded.
e. Shrink fitted and welded. Correct Answers e
A pressure-velocity compounded turbine may have:
, 1. Two velocity-compounded stages
2. One velocity-compounded stages
3. Several pressure-compounded stages
4. Pressure and velocity-compounded stages
a. 1,2
b. 3,4
c. 1,2,3
d. 2,3,4
e. 1,2,3,4. Correct Answers e
A reaction turbine has:
a. Rows of stationary nozzles and moving blades.
b. Rows of stationary blades alternating with rows of moving
blades.
c. A force on the blades produced according to Newton's 2nd
Law
of Motion.
d. A pressure increase in the nozzles.
e. A velocity drop in the stationary blades. Correct Answers b
A reaction turbine results in a long machine due to a large
number of alternate rows of:
a. Nozzles and moving blades.
b. Nozzles and stationary blades.
c. Fixed and moving blades.
d. Stationary blades.
e. Moving blades and nozzles. Correct Answers c
A steam turbine assembled casing is machined off inside in a
boring mill to:
1. Make grooves for shaft seals.
Solutions
_____ turbines are large turbines consisting of two or more
turbines in series coupled together as one shaft and applied to
one generator.
a. Topping.
b. Tandem-compound.
c. Condensing-bleeder.
d. Cross-compound.
e. Mixed pressure. Correct Answers b
_____ turbines are large turbines with parallel shafts with a
generator on each shaft.
a. Condensing.
b. Tandem-compound.
c. Extraction-bleeder.
d. Condensing-bleeder.
e. Cross-compound. Correct Answers e
A back-pressure turbine with exhaust steam going to an old
boiler header that is supplying steam to an old lower pressure
turbine is called a:
a. Condensing-bleeder turbine.
b. Cross compound turbine.
c. Condensing turbine.
d. Topping turbine.
e. Mixed pressure turbine. Correct Answers d
A condensing-bleeder turbine can bleed up to _____ of the total
steam flow.
,a. 1%
b. 15%
c. 2%
d. 10%
e. 5%. Correct Answers c
A dummy piston on a steam turbine is used to:
a. Counter vibration and ensure a smooth running unit.
b. Increase turbine output.
c. Measure axial position.
d. Counter end thrust.
e. Provide an area to install a labyrinth deal. Correct Answers d
A generator coupled on one shaft to a turbine consisting of two
or more turbine in series is called a:
a. Condensing-bleeder.
b. Cross-compound turbine.
c. Mixed pressure.
d. Tandem-compound turbine.
e. Topping. Correct Answers d
A hollow drum rotor, for good balance, is machined both outside
and inside thus the drum must be open at one end. How is the
drum end cover with shaft installed in the rotor?
a. Press fitted.
b. Welded on.
c. Bolted.
d. Press fitted and welded.
e. Shrink fitted and welded. Correct Answers e
A pressure-velocity compounded turbine may have:
, 1. Two velocity-compounded stages
2. One velocity-compounded stages
3. Several pressure-compounded stages
4. Pressure and velocity-compounded stages
a. 1,2
b. 3,4
c. 1,2,3
d. 2,3,4
e. 1,2,3,4. Correct Answers e
A reaction turbine has:
a. Rows of stationary nozzles and moving blades.
b. Rows of stationary blades alternating with rows of moving
blades.
c. A force on the blades produced according to Newton's 2nd
Law
of Motion.
d. A pressure increase in the nozzles.
e. A velocity drop in the stationary blades. Correct Answers b
A reaction turbine results in a long machine due to a large
number of alternate rows of:
a. Nozzles and moving blades.
b. Nozzles and stationary blades.
c. Fixed and moving blades.
d. Stationary blades.
e. Moving blades and nozzles. Correct Answers c
A steam turbine assembled casing is machined off inside in a
boring mill to:
1. Make grooves for shaft seals.
