PE 3B2 Chp 1 (Steam Turbine Principles & Design)
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
. The axial thrust in impulse turbines is nearly eliminated by use
of a balance or dummy piston.
a. True
b. False Correct Answers b
A back-pressure turbine which exhaust steam to an old boiler
header still supplying steam to an old boiler header still
supplying steam to an old lower pressure turbine is called:
,a. Condensing-bleeder turbine
b. Cross compound turbine
c. Condensing turbine
d. Topping turbine
e. Mixed pressure turbine Correct Answers d
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 balance piston on a steam turbine is used to:
a. Counteract vibration and therefore ensure a smooth running
unit
b. Increase turbine output
c. Measure axial position
d. Counteract end thrust
e. Provide an area to install a labyrinth seal Correct Answers d
, A barring gear consists of an electric motor and several sets of
reducing gears to turn the turbine shaft at a low speed. It is
used:1) After stopping a hot turbine to prevent "hogging"2)
Only on small turbine3) Continually when the turbine is not
operating4) Prior to start-up for approximately 3 hours
a. 1, 2, 4
b. 1, 2, 3
c. 1, 4
d. 2, 3
e. 2, 4 Correct Answers c
A condensing-bleeder turbine can bleed up to ______ of the
total steam flow.
a. 0.1
b. 0.15
c. 0.2
d. 0.25
e. 0.3 Correct Answers c
A generator coupled on one shaft to a turbine consisting of two
or more turbine in series is called?
a. Condensing-bleeder
b. Cross-compound turbine
c. Mixed pressure
d. Tandem-compound turbine
e. Topping Correct Answers d
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
. The axial thrust in impulse turbines is nearly eliminated by use
of a balance or dummy piston.
a. True
b. False Correct Answers b
A back-pressure turbine which exhaust steam to an old boiler
header still supplying steam to an old boiler header still
supplying steam to an old lower pressure turbine is called:
,a. Condensing-bleeder turbine
b. Cross compound turbine
c. Condensing turbine
d. Topping turbine
e. Mixed pressure turbine Correct Answers d
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 balance piston on a steam turbine is used to:
a. Counteract vibration and therefore ensure a smooth running
unit
b. Increase turbine output
c. Measure axial position
d. Counteract end thrust
e. Provide an area to install a labyrinth seal Correct Answers d
, A barring gear consists of an electric motor and several sets of
reducing gears to turn the turbine shaft at a low speed. It is
used:1) After stopping a hot turbine to prevent "hogging"2)
Only on small turbine3) Continually when the turbine is not
operating4) Prior to start-up for approximately 3 hours
a. 1, 2, 4
b. 1, 2, 3
c. 1, 4
d. 2, 3
e. 2, 4 Correct Answers c
A condensing-bleeder turbine can bleed up to ______ of the
total steam flow.
a. 0.1
b. 0.15
c. 0.2
d. 0.25
e. 0.3 Correct Answers c
A generator coupled on one shaft to a turbine consisting of two
or more turbine in series is called?
a. Condensing-bleeder
b. Cross-compound turbine
c. Mixed pressure
d. Tandem-compound turbine
e. Topping Correct Answers d
