3B2 CHAP 1-7 (2ND SET) EXAM
QUESTIONS AND ANSWERS. VERIFIED
2026.
In an impulse steam turbine nozzle, the following events take place:
1. The steam pressure decreases
2. The enthalpy of the steam decreases
3. The velocity of the steam increases
4. The volume of the steam increases
a) 1, 2, 4
b) 1 , 3, 4
c) 2, 3, 4
d) 1, 2, 3, 4
e) 1, 2, 3 - ANS d) 1, 2, 3, 4
Turbine nozzles convert heat energy into.
a. potential energy
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,b. enthalpy
c. eddy currents
d. kinetic energy
e. pressure - ANS d. kinetic energy
The purpose of the bucket or moving blade on the rotor is to convert the ______ energy of the
steam into ______ energy.
a. heat, potential
b. kinetic, useful
c. kinetic, mechanical
d. heat, kinetic
e. mechanical, kinetic - ANS c. kinetic, mechanical
In an impulse turbine, as the steam passes through the moving blades the _______ drops but
the ______ remains the same.
a. velocity, pressure
b. enthalpy, velocity
c. pressure, velocity
d. volume, velocity
e. velocity, kinetic energy - ANS a. velocity, pressurea,
The pressure at the outlet from the moving blades is the same as the pressure at the inlet to the
moving blades in ______ turbine.
a. a topping
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,b. a reaction
c. a back pressure
d. an impulse
e. an extraction - ANS d. an impulse
Steam turbine stationary nozzles serve to:
1) Decrease steam pressure
2) Increase steam enthalpy
3) Decrease steam friction
4) Increase steam velocity
a. 1, 2, 3
b. 1, 3, 4
c. 1, 4
d. 2, 3
e. 2, 3, 4 - ANS c. 1, 4
On an extraction turbine, the extraction pressure is:
a. not critical
b. varied according to turbine load
c. maintained constant regardless of turbine load
d. proportional to the turbine load
e. reduced if load increases - ANS c. maintained constant regardless of turbine load
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, A back pressure turbine which exhausts 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 - ANS d. Topping turbine
A topping turbine is a special application of a ______ turbine.
a. Condensing
b. Extraction
c. Condensing-Bleeder
d. Tandem compound
e. Backpressure - ANS e. backpressure
________ 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 - ANS b. tandem compound
4 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
QUESTIONS AND ANSWERS. VERIFIED
2026.
In an impulse steam turbine nozzle, the following events take place:
1. The steam pressure decreases
2. The enthalpy of the steam decreases
3. The velocity of the steam increases
4. The volume of the steam increases
a) 1, 2, 4
b) 1 , 3, 4
c) 2, 3, 4
d) 1, 2, 3, 4
e) 1, 2, 3 - ANS d) 1, 2, 3, 4
Turbine nozzles convert heat energy into.
a. potential energy
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,b. enthalpy
c. eddy currents
d. kinetic energy
e. pressure - ANS d. kinetic energy
The purpose of the bucket or moving blade on the rotor is to convert the ______ energy of the
steam into ______ energy.
a. heat, potential
b. kinetic, useful
c. kinetic, mechanical
d. heat, kinetic
e. mechanical, kinetic - ANS c. kinetic, mechanical
In an impulse turbine, as the steam passes through the moving blades the _______ drops but
the ______ remains the same.
a. velocity, pressure
b. enthalpy, velocity
c. pressure, velocity
d. volume, velocity
e. velocity, kinetic energy - ANS a. velocity, pressurea,
The pressure at the outlet from the moving blades is the same as the pressure at the inlet to the
moving blades in ______ turbine.
a. a topping
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,b. a reaction
c. a back pressure
d. an impulse
e. an extraction - ANS d. an impulse
Steam turbine stationary nozzles serve to:
1) Decrease steam pressure
2) Increase steam enthalpy
3) Decrease steam friction
4) Increase steam velocity
a. 1, 2, 3
b. 1, 3, 4
c. 1, 4
d. 2, 3
e. 2, 3, 4 - ANS c. 1, 4
On an extraction turbine, the extraction pressure is:
a. not critical
b. varied according to turbine load
c. maintained constant regardless of turbine load
d. proportional to the turbine load
e. reduced if load increases - ANS c. maintained constant regardless of turbine load
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, A back pressure turbine which exhausts 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 - ANS d. Topping turbine
A topping turbine is a special application of a ______ turbine.
a. Condensing
b. Extraction
c. Condensing-Bleeder
d. Tandem compound
e. Backpressure - ANS e. backpressure
________ 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 - ANS b. tandem compound
4 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
