3B2 ABSA Comprehensive Study Pack | Full
Test Bank Chapters 1–15 | Correct and Verified
Answers | Latest 2025 Edition
1. With regard to machine supporting, grout is required to:
a. Take the place of a bedplate
b. Act as a springy cushion for the machine c. Provide solid support for
the machine
c. Be between 20 and 40 cm thick
d. Be placed under the bedplate only. - ANSWER c
2. A fan is driven through a set of V belts that contain 5 belts. The belts are 16
months old when the second belt from the outside of the sheave breaks. You
should:
a. Replace the broken belt with a new one and use belt dressing on the
old one
b. Continue to operate with the four remaining belts, applying a good
quality belt dressing
c. Replace the complete set of belts with a new set
d. Replace the drive assembly with a chain drive
e. Replace both the outside belt and the broken one. - ANSWER c
3. Environmental management program involves protection of the environment
and _____ awareness.
a. Private.
b. Individual.
c. Public.
d. Government.
e. Industrial. - ANSWER c
4. Plants that have numerous operation units require their employees to be
familiar with all of those units by spending time working in all of them over
a period of years. The most effective way to become familiarized with a
particular unit is by: - ANSWER Reviewing the operation procedures for
that unit
5. Properly planned maintenance: - ANSWER Reduces the unplanned outages
of equipment
1
,6. If a company fails to control emissions from the plant, this could result in: -
ANSWER The company losing their operating license
7. When a piece of equipment begins to exhibit signs of unsafe performance,
such as excessive vibration, who should this condition be immediately
reported to? - ANSWER Immediate supervisor
8. The main reason why a plant provides its employee with procedures to
operate a piece of equipment is to: - ANSWER Attempt to eliminate the risk
of accident or incident
9. A dummy piston is used on a steam turbine to: - ANSWER Counter end
thrust
10.The entrance angle of a reaction blade is: - ANSWER Almost 90 degrees
11.To ensure a tight seal, a steam turbine balance piston is fitted with _____. -
ANSWER Labyrinth seals
12.Extraction turbines are turbines where steam is extracted at one or more
points at constant: - ANSWER Pressure
13.In a steam turbine having pressure drop across the moving blades, an
unbalanced _____ thrust will be developed upon the rotor. - ANSWER
Axial
14.All large disc rotors are machined from __________ steel: - ANSWER A
solid forging of nickel steel.
15.Convergent-divergent nozzles are used when: - ANSWER High pressure
drops are required
16.During start up of a steam turbine the thrust block is pushed against a stop in
the direction of the exhaust for: - ANSWER Maximum blade clearance
17.In a steam turbine using velocity compounding _____ expand(s) the steam
from initial to exhaust pressure. - ANSWER One set of nozzles
2
,18.A thrust adjusting gear: - ANSWER Positions the turbine rotor axially
19.A hollow drum rotor of a steam turbine is machined both outside and inside.
How is the drum end cover with shaft installed in the rotor? - ANSWER
Shrink fitted and welded
20.Steam turbine casing joints are made steam tight by matching _____ exactly.
- ANSWER Flange faces
21.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: -
ANSWER Topping turbine
22.A reaction turbine has: - ANSWER Rows of stationary blades alternating
with rows of moving blades
23.When disc rotors are assembled, the discs are heated until they are easily slid
along the shaft and then located in the correct position on the shaft and shaft
key. A small clearance between the discs prevents: - ANSWER Thermal
stress in the shaft
24.The purpose of compounding in a steam turbine is to: - ANSWER Reduce
steam and blade velocity
25.On larger turbines the _____ is split in a horizontal direction. - ANSWER
Cylinder
26.The pressure at the outlet from the moving blades is the same as the pressure
at the inlet to the moving blades in a/an __________ turbine. - ANSWER
Impulse
27.In a condensing-bleeder turbine up to 2% of the total steam flow may be
bled off. What is the bleed-steam used for? - ANSWER Feed-water heating
28.It is general practice to let the thickness of the walls and flanges _____ from
inlet to exhaust end of a steam turbine casing: - ANSWER Decrease
29.A water seal is used on some steam turbines ________ to insure that no air
leaks in along the shaft: - ANSWER At speeds above 2000 rev/mm
3
, 30.If a turbine is shut down and left at a standstill while still hot, the lower half
of the rotor will cool faster than the upper half. The rotor will "hog", which
means it will ___________. - ANSWER Bend upwards
31.The warm-up time required of a turbine is dependant on: - ANSWER The
size of the turbine
32.The advantage of mechanical-hydraulic governors is: - ANSWER
Mechanical losses are greatly reduced
33.In order to supply oil at two different pressures, a typical turbine lube oil
system has: - ANSWER A pressure reducing valve
34.Overspeed trips: - ANSWER Are independent of the governing system
35.In a back-pressure turbine the governor is _____ sensitive. - ANSWER
Pressure
36.On startup of a large condensing turbine, the cooling water to the oil cooler
is turned on: - ANSWER When the oil reaches normal operating
temperatures
37.In an overspeed trip the spring loaded tripping bolt has a center of gravity: -
ANSWER Towards the head end of the bolt
38.Turbines used to drive auxiliary equipment are usually lubricated by: -
ANSWER Ring-oiled bearings
39.A mechanical overspeed trip is designed to _____ in the event of an
overspeed condition. - ANSWER Shut off the turbine's steam supply
40.When starting an extraction turbine, sealing steam to the turbine glands is
admitted _____ is put in operation - ANSWER After the extraction pump
41.The barring gear: - ANSWER Should disengage and automatically shut
down after steam starts to rotate the turbine
42.Sealing steam to the turbine glands is admitted _____ is put in operation -
ANSWER After the extraction pump
4
Test Bank Chapters 1–15 | Correct and Verified
Answers | Latest 2025 Edition
1. With regard to machine supporting, grout is required to:
a. Take the place of a bedplate
b. Act as a springy cushion for the machine c. Provide solid support for
the machine
c. Be between 20 and 40 cm thick
d. Be placed under the bedplate only. - ANSWER c
2. A fan is driven through a set of V belts that contain 5 belts. The belts are 16
months old when the second belt from the outside of the sheave breaks. You
should:
a. Replace the broken belt with a new one and use belt dressing on the
old one
b. Continue to operate with the four remaining belts, applying a good
quality belt dressing
c. Replace the complete set of belts with a new set
d. Replace the drive assembly with a chain drive
e. Replace both the outside belt and the broken one. - ANSWER c
3. Environmental management program involves protection of the environment
and _____ awareness.
a. Private.
b. Individual.
c. Public.
d. Government.
e. Industrial. - ANSWER c
4. Plants that have numerous operation units require their employees to be
familiar with all of those units by spending time working in all of them over
a period of years. The most effective way to become familiarized with a
particular unit is by: - ANSWER Reviewing the operation procedures for
that unit
5. Properly planned maintenance: - ANSWER Reduces the unplanned outages
of equipment
1
,6. If a company fails to control emissions from the plant, this could result in: -
ANSWER The company losing their operating license
7. When a piece of equipment begins to exhibit signs of unsafe performance,
such as excessive vibration, who should this condition be immediately
reported to? - ANSWER Immediate supervisor
8. The main reason why a plant provides its employee with procedures to
operate a piece of equipment is to: - ANSWER Attempt to eliminate the risk
of accident or incident
9. A dummy piston is used on a steam turbine to: - ANSWER Counter end
thrust
10.The entrance angle of a reaction blade is: - ANSWER Almost 90 degrees
11.To ensure a tight seal, a steam turbine balance piston is fitted with _____. -
ANSWER Labyrinth seals
12.Extraction turbines are turbines where steam is extracted at one or more
points at constant: - ANSWER Pressure
13.In a steam turbine having pressure drop across the moving blades, an
unbalanced _____ thrust will be developed upon the rotor. - ANSWER
Axial
14.All large disc rotors are machined from __________ steel: - ANSWER A
solid forging of nickel steel.
15.Convergent-divergent nozzles are used when: - ANSWER High pressure
drops are required
16.During start up of a steam turbine the thrust block is pushed against a stop in
the direction of the exhaust for: - ANSWER Maximum blade clearance
17.In a steam turbine using velocity compounding _____ expand(s) the steam
from initial to exhaust pressure. - ANSWER One set of nozzles
2
,18.A thrust adjusting gear: - ANSWER Positions the turbine rotor axially
19.A hollow drum rotor of a steam turbine is machined both outside and inside.
How is the drum end cover with shaft installed in the rotor? - ANSWER
Shrink fitted and welded
20.Steam turbine casing joints are made steam tight by matching _____ exactly.
- ANSWER Flange faces
21.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: -
ANSWER Topping turbine
22.A reaction turbine has: - ANSWER Rows of stationary blades alternating
with rows of moving blades
23.When disc rotors are assembled, the discs are heated until they are easily slid
along the shaft and then located in the correct position on the shaft and shaft
key. A small clearance between the discs prevents: - ANSWER Thermal
stress in the shaft
24.The purpose of compounding in a steam turbine is to: - ANSWER Reduce
steam and blade velocity
25.On larger turbines the _____ is split in a horizontal direction. - ANSWER
Cylinder
26.The pressure at the outlet from the moving blades is the same as the pressure
at the inlet to the moving blades in a/an __________ turbine. - ANSWER
Impulse
27.In a condensing-bleeder turbine up to 2% of the total steam flow may be
bled off. What is the bleed-steam used for? - ANSWER Feed-water heating
28.It is general practice to let the thickness of the walls and flanges _____ from
inlet to exhaust end of a steam turbine casing: - ANSWER Decrease
29.A water seal is used on some steam turbines ________ to insure that no air
leaks in along the shaft: - ANSWER At speeds above 2000 rev/mm
3
, 30.If a turbine is shut down and left at a standstill while still hot, the lower half
of the rotor will cool faster than the upper half. The rotor will "hog", which
means it will ___________. - ANSWER Bend upwards
31.The warm-up time required of a turbine is dependant on: - ANSWER The
size of the turbine
32.The advantage of mechanical-hydraulic governors is: - ANSWER
Mechanical losses are greatly reduced
33.In order to supply oil at two different pressures, a typical turbine lube oil
system has: - ANSWER A pressure reducing valve
34.Overspeed trips: - ANSWER Are independent of the governing system
35.In a back-pressure turbine the governor is _____ sensitive. - ANSWER
Pressure
36.On startup of a large condensing turbine, the cooling water to the oil cooler
is turned on: - ANSWER When the oil reaches normal operating
temperatures
37.In an overspeed trip the spring loaded tripping bolt has a center of gravity: -
ANSWER Towards the head end of the bolt
38.Turbines used to drive auxiliary equipment are usually lubricated by: -
ANSWER Ring-oiled bearings
39.A mechanical overspeed trip is designed to _____ in the event of an
overspeed condition. - ANSWER Shut off the turbine's steam supply
40.When starting an extraction turbine, sealing steam to the turbine glands is
admitted _____ is put in operation - ANSWER After the extraction pump
41.The barring gear: - ANSWER Should disengage and automatically shut
down after steam starts to rotate the turbine
42.Sealing steam to the turbine glands is admitted _____ is put in operation -
ANSWER After the extraction pump
4
