3B2 Study Questions And Full Set
Correct Answers | 2026 Update
A thrust adjusting gear __________.
Select one:
a.Is found on impulse turbines
b.Adjust the thrust generated by the turbine
c.Positions the turbine rotor axially
d.Compensates for steam pressure variations
e.Is adjusted to provide minimum clearances on start-up - Ans--c
In a(n) _____ 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. Impulse2. Moving3. Reaction4.
Drip5. Stationary6. Leak
Select one:
a.1, 2, 4
b.3, 5, 6
c.3, 2, 6
d.1, 5, 4
e.1, 5, 6 - Ans--c
What is the name for a turbine that expands the steam in two or more sets of
nozzles in series? Each set of nozzles has velocity-compounded blades to
receive the steam issuing from the nozzles.
Select one:
a.Extraction turbine
b.Velocity-compounded turbine
c.Pressure-compounded turbine
d.Pressure-velocity-compounded turbine
e.Mixed-pressure turbine - Ans--d
During start-up of a steam turbine, why is the thrust block pushed against a
stop in the direction of the exhaust?
Select one:
,a.For maximum seal clearance
b.For minimum seal clearance
c.For maximum blade efficiency
d.For maximum blade clearance
e.For minimum blade clearance - Ans--d
Which of the following are the two types of governors used on steam
turbines?1. Flow-sensitive governor2. Pressure-sensitive governor3.
Temperature-sensitive governor4. Speed-sensitive governor
Select one:
a.2, 4
b.1, 4
c.1, 2
d.2, 3
e.3, 4 - Ans--a
The jacking oil pump is shut down when the turbine reaches a speed of
approximately _____ rpm.
Select one:
a.5-10
b.20-30
c.40-50
d.50-60
e.0-80 - Ans--d
Lubricating oil for a turbine can do which of the following?1. Lubricate
bearings2. Lubricate gears3. Operate throttle valves4. Be supplied to a
governor
Select one:
a.1, 2
b.3, 4
c.1, 2, 3
d.2, 3, 4
e.1, 2, 3, 4 - Ans--e
In an overspeed trip, where is the centre of gravity for the spring-loaded
tripping bolt?
Select one:
, a.Concentric with the shaft
b.Towards the nut end of the bolt
c.Towards the condenser end of the shaft
d.Towards the head end of the bolt
e.Towards the center of the bolt - Ans--d
In the event of a rising exhaust hood temperature, the __________ will open
and provide condensate flow to the low-pressure turbine sections.
Select one:
a.Intercept valve
b.Non-return valve
c.Spray valve
d.Ventilator valve - Ans--c
In order to supply oil at two different pressures, a typical turbine lube oil
system has:
Select one:
a.One centrifugal pump and one reciprocating positive displacement pump
b.One shaft driven pump comprising both high- and low-pressure sections
c.One shaft driven high-pressure pump and an electric low-pressure pump
d.A pressure reducing valve
e.A separate pump for each system - Ans--d
A lower-than-normal vacuum in the condenser is likely an indication of
insufficient cooling and/or the presence of __________ air and non-
condensable gases.
Select one:
a.Heated
b.Polluted
c.Less
d.Excessive - Ans--d
Water boxes are typically made of which material?
Select one:
a.Admiralty brass
b.Cast iron
c.Muntz metal
d.Low carbon steel
Correct Answers | 2026 Update
A thrust adjusting gear __________.
Select one:
a.Is found on impulse turbines
b.Adjust the thrust generated by the turbine
c.Positions the turbine rotor axially
d.Compensates for steam pressure variations
e.Is adjusted to provide minimum clearances on start-up - Ans--c
In a(n) _____ 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. Impulse2. Moving3. Reaction4.
Drip5. Stationary6. Leak
Select one:
a.1, 2, 4
b.3, 5, 6
c.3, 2, 6
d.1, 5, 4
e.1, 5, 6 - Ans--c
What is the name for a turbine that expands the steam in two or more sets of
nozzles in series? Each set of nozzles has velocity-compounded blades to
receive the steam issuing from the nozzles.
Select one:
a.Extraction turbine
b.Velocity-compounded turbine
c.Pressure-compounded turbine
d.Pressure-velocity-compounded turbine
e.Mixed-pressure turbine - Ans--d
During start-up of a steam turbine, why is the thrust block pushed against a
stop in the direction of the exhaust?
Select one:
,a.For maximum seal clearance
b.For minimum seal clearance
c.For maximum blade efficiency
d.For maximum blade clearance
e.For minimum blade clearance - Ans--d
Which of the following are the two types of governors used on steam
turbines?1. Flow-sensitive governor2. Pressure-sensitive governor3.
Temperature-sensitive governor4. Speed-sensitive governor
Select one:
a.2, 4
b.1, 4
c.1, 2
d.2, 3
e.3, 4 - Ans--a
The jacking oil pump is shut down when the turbine reaches a speed of
approximately _____ rpm.
Select one:
a.5-10
b.20-30
c.40-50
d.50-60
e.0-80 - Ans--d
Lubricating oil for a turbine can do which of the following?1. Lubricate
bearings2. Lubricate gears3. Operate throttle valves4. Be supplied to a
governor
Select one:
a.1, 2
b.3, 4
c.1, 2, 3
d.2, 3, 4
e.1, 2, 3, 4 - Ans--e
In an overspeed trip, where is the centre of gravity for the spring-loaded
tripping bolt?
Select one:
, a.Concentric with the shaft
b.Towards the nut end of the bolt
c.Towards the condenser end of the shaft
d.Towards the head end of the bolt
e.Towards the center of the bolt - Ans--d
In the event of a rising exhaust hood temperature, the __________ will open
and provide condensate flow to the low-pressure turbine sections.
Select one:
a.Intercept valve
b.Non-return valve
c.Spray valve
d.Ventilator valve - Ans--c
In order to supply oil at two different pressures, a typical turbine lube oil
system has:
Select one:
a.One centrifugal pump and one reciprocating positive displacement pump
b.One shaft driven pump comprising both high- and low-pressure sections
c.One shaft driven high-pressure pump and an electric low-pressure pump
d.A pressure reducing valve
e.A separate pump for each system - Ans--d
A lower-than-normal vacuum in the condenser is likely an indication of
insufficient cooling and/or the presence of __________ air and non-
condensable gases.
Select one:
a.Heated
b.Polluted
c.Less
d.Excessive - Ans--d
Water boxes are typically made of which material?
Select one:
a.Admiralty brass
b.Cast iron
c.Muntz metal
d.Low carbon steel
