3B2 - Ultimate ABSA Exam and Study Guide C1-15
Newest 2026 Test Bank| Complete Actual Exam
Questions and Correct Verified Answers/ Already
Graded A+ (Latest!!)
1. Turbine nozzles convert heat energy into which form of
energy?
A) Potential energy
B) Enthalpy
C) Eddy currents
D) Kinetic energy
E) Pressure
Answer: D
Rationale: Turbine nozzles convert the heat energy (enthalpy) of
the steam into kinetic energy (velocity). The nozzle shape
(convergent or convergent-divergent) accelerates the steam to
1
,high velocity, which then impacts the moving blades to produce
rotational mechanical energy .
2. What is the primary function of the moving blades (buckets)
on a turbine rotor?
A) To convert heat energy into kinetic energy
B) To convert kinetic energy of steam into mechanical energy
C) To reduce steam pressure only
D) To increase steam temperature
E) To condense exhaust steam
Answer: B
Rationale: The moving blades on the rotor convert the kinetic
energy (velocity) of the steam into mechanical (rotational)
energy. As the high-velocity steam passes through the moving
blades, it changes direction and loses velocity, transferring its
momentum to the rotor .
2
,3. In an impulse turbine, what happens to the steam pressure
as it passes through the moving blades?
A) Pressure increases significantly
B) Pressure remains constant
C) Pressure drops by 50%
D) Pressure fluctuates randomly
E) Pressure converts to temperature
Answer: B
Rationale: In an impulse turbine, all pressure drop occurs in the
stationary nozzles. The steam pressure at the outlet of the moving
blades equals the pressure at the inlet to the moving blades.
Only the velocity drops as the steam passes through the moving
blades .
3
, 4. Which type of steam turbine has a pressure drop across
BOTH the stationary and moving blades?
A) Impulse turbine
B) Velocity-compounded turbine
C) Reaction turbine
D) Pressure-compounded turbine
E) Extraction turbine
Answer: C
Rationale: The distinguishing feature of a reaction turbine is that
the pressure drops across both the fixed (stationary) and moving
blades. The moving blades are nozzle-shaped, and the reaction
principle causes the steam to accelerate through them .
5. Labyrinth seals used on steam turbine shafts are typically
made of which materials?
4
Newest 2026 Test Bank| Complete Actual Exam
Questions and Correct Verified Answers/ Already
Graded A+ (Latest!!)
1. Turbine nozzles convert heat energy into which form of
energy?
A) Potential energy
B) Enthalpy
C) Eddy currents
D) Kinetic energy
E) Pressure
Answer: D
Rationale: Turbine nozzles convert the heat energy (enthalpy) of
the steam into kinetic energy (velocity). The nozzle shape
(convergent or convergent-divergent) accelerates the steam to
1
,high velocity, which then impacts the moving blades to produce
rotational mechanical energy .
2. What is the primary function of the moving blades (buckets)
on a turbine rotor?
A) To convert heat energy into kinetic energy
B) To convert kinetic energy of steam into mechanical energy
C) To reduce steam pressure only
D) To increase steam temperature
E) To condense exhaust steam
Answer: B
Rationale: The moving blades on the rotor convert the kinetic
energy (velocity) of the steam into mechanical (rotational)
energy. As the high-velocity steam passes through the moving
blades, it changes direction and loses velocity, transferring its
momentum to the rotor .
2
,3. In an impulse turbine, what happens to the steam pressure
as it passes through the moving blades?
A) Pressure increases significantly
B) Pressure remains constant
C) Pressure drops by 50%
D) Pressure fluctuates randomly
E) Pressure converts to temperature
Answer: B
Rationale: In an impulse turbine, all pressure drop occurs in the
stationary nozzles. The steam pressure at the outlet of the moving
blades equals the pressure at the inlet to the moving blades.
Only the velocity drops as the steam passes through the moving
blades .
3
, 4. Which type of steam turbine has a pressure drop across
BOTH the stationary and moving blades?
A) Impulse turbine
B) Velocity-compounded turbine
C) Reaction turbine
D) Pressure-compounded turbine
E) Extraction turbine
Answer: C
Rationale: The distinguishing feature of a reaction turbine is that
the pressure drops across both the fixed (stationary) and moving
blades. The moving blades are nozzle-shaped, and the reaction
principle causes the steam to accelerate through them .
5. Labyrinth seals used on steam turbine shafts are typically
made of which materials?
4
