3B2 Chapter 1 Questions With Complete Solutions
(3B2-C-01-19) In a condensing-bleeder turbine up to 20% of the
total steam flow may be bled off. What is the bleed-steam used
for?
Select one:
A.Building heating
B.Relieving pressure
C.Atomization of the fuel
D.To be reheated in boiler
E.Feed-water heating
E
(3B2-C-01-20) In a reaction turbine:1. Velocity increases in the
moving blades2. Velocity decreases in the stationary blades3.
Pressure drops in the moving blades4. Pressure drops in the
stationary blades
Select one:
A.1, 2
B.3, 4
C.1, 2, 3
D.2, 3, 4
E.1, 2, 3, 4
B
3B2-C-01-21) In a steam turbine having pressure drop across the
moving blades, an unbalanced _____ thrust will be developed
upon the rotor.
,Select one:
A.Axial
B.Centrifugal
C.Radial
D.Impulse
E.Rotational
A
(3B2-C-01-22) In a steam turbine using velocity compounding
_____ expand(s) the steam from initial to exhaust pressure.
Select one:
A.Two sets of nozzles and moving blades
B.Stationary blades
C.Stationary and moving blades
D.Moving blades
E.One set of nozzles
E
(3B2-C-01-23) In a/an _____ turbine there is a difference in
pressure across the _____ blades. Therefore the steam will tend
to _____ around the periphery of the blades instead of passing
through them.
1. Impulse
2. Moving
3. Reaction
4. Drip
5. Stationary
6. Leak
Select one:
, A.1, 2, 4
B.3, 5, 6
C.3, 2, 6
D.1, 5, 4
E.1, 5, 6
C
(3B2-C-01-24) In an impulse steam turbine nozzle the following
events take place:
1. Steam pressure decreases
2. Enthalpy of the steam decreases
3. Velocity of the steam increases
4. Volume of the steam increases
Select one:
A.1, 2, 4
B.1, 3, 4
C.2, 3, 4
D.1, 2, 3
E.1, 2, 3, 4
E
(3B2-C-01-25) In pressure compound steam turbines:
1. The expansion of steam from boiler pressure to exhaust
pressure is carried out in a number of steps or stages
2. Each stage has a set of nozzles and a row of blades
3. All of the velocity available is developed in one set of nozzles
4. Rows of moving blades are separated by partitions or
diaphragms into which nozzles have been installed
Select one:
(3B2-C-01-19) In a condensing-bleeder turbine up to 20% of the
total steam flow may be bled off. What is the bleed-steam used
for?
Select one:
A.Building heating
B.Relieving pressure
C.Atomization of the fuel
D.To be reheated in boiler
E.Feed-water heating
E
(3B2-C-01-20) In a reaction turbine:1. Velocity increases in the
moving blades2. Velocity decreases in the stationary blades3.
Pressure drops in the moving blades4. Pressure drops in the
stationary blades
Select one:
A.1, 2
B.3, 4
C.1, 2, 3
D.2, 3, 4
E.1, 2, 3, 4
B
3B2-C-01-21) In a steam turbine having pressure drop across the
moving blades, an unbalanced _____ thrust will be developed
upon the rotor.
,Select one:
A.Axial
B.Centrifugal
C.Radial
D.Impulse
E.Rotational
A
(3B2-C-01-22) In a steam turbine using velocity compounding
_____ expand(s) the steam from initial to exhaust pressure.
Select one:
A.Two sets of nozzles and moving blades
B.Stationary blades
C.Stationary and moving blades
D.Moving blades
E.One set of nozzles
E
(3B2-C-01-23) In a/an _____ turbine there is a difference in
pressure across the _____ blades. Therefore the steam will tend
to _____ around the periphery of the blades instead of passing
through them.
1. Impulse
2. Moving
3. Reaction
4. Drip
5. Stationary
6. Leak
Select one:
, A.1, 2, 4
B.3, 5, 6
C.3, 2, 6
D.1, 5, 4
E.1, 5, 6
C
(3B2-C-01-24) In an impulse steam turbine nozzle the following
events take place:
1. Steam pressure decreases
2. Enthalpy of the steam decreases
3. Velocity of the steam increases
4. Volume of the steam increases
Select one:
A.1, 2, 4
B.1, 3, 4
C.2, 3, 4
D.1, 2, 3
E.1, 2, 3, 4
E
(3B2-C-01-25) In pressure compound steam turbines:
1. The expansion of steam from boiler pressure to exhaust
pressure is carried out in a number of steps or stages
2. Each stage has a set of nozzles and a row of blades
3. All of the velocity available is developed in one set of nozzles
4. Rows of moving blades are separated by partitions or
diaphragms into which nozzles have been installed
Select one:
