Power Engineering - 4B7 Practice
Exam Questions & Answers (Grade
A+)
Between a valve and a pushrod, there is a
a. camshaft
b. wrist pin
c. connecting rod
d. rocker arm -
correct answer ✅d. rocker arm
4B07-04-01-07 A simple gas turbine is one without reheaters or:
a. Starting motors
b. Compressors
c. Combustors
d. Regenerators -
correct answer ✅d. Regenerators
4B07-04-01-08 An essential auxiliary in a gas turbine installation is:
a. an air heater
,Power Engineering - 4B7 Practice
Exam Questions & Answers (Grade
A+)
b. a generator
c. a water injection system
d. a starting motor -
correct answer ✅d. a starting motor
In a diesel engine, an injection nozzle is used for ___________
a. Lubricating the journal bearings
b. Scavenging the cylinder
c. Igniting the fuel.
d. Atomizing the fuel. -
correct answer ✅d. Atomizing the fuel.
During a single rotation of a 4-stroke cycle gasoline engine
crankshaft, the engine undergoes
a. a power stroke, immediately followed by an exhaust stroke
b. an intake stroke, immediately followed by an exhaust stroke
c. a compression stroke, immediately followed by an exhaust stroke
,Power Engineering - 4B7 Practice
Exam Questions & Answers (Grade
A+)
d. an intake stroke, immediately followed by a power stroke -
correct answer ✅a. a power stroke, immediately followed by an
exhaust stroke
On steam turbines, carbon glands are:
a. Lubricated by the main oil pump
b. Lubricated by the seal oil pump
c. Lubricated by governor oil
d. Self-lubricating -
correct answer ✅d. Self-lubricating
Excessive wind velocity in a natural draft cooling tower may cause:
a. Damaged louvres
b. High drift losses
c. Unstable sump water level
d. Over-cooling of the water -
correct answer ✅b. High drift losses
, Power Engineering - 4B7 Practice
Exam Questions & Answers (Grade
A+)
4B07-04-01-02 The combustion chamber of a gas turbine:
a. increases the density of the compressed air.
b. must be water cooled to protect against high temperature.
c. is where fuel is added to air, and burned.
d. preheats the combustion air before it is compressed. -
correct answer ✅c. is where fuel is added to air, and burned.
A gas turbine compressor:
a. is always an axial compressor
b. can be driven by the load turbine
c. must be intercooled
d. must be a multi-stage compressor -
correct answer ✅b. can be driven by the load turbine
Water is removed from the air stream leaving a cooling tower, using
Exam Questions & Answers (Grade
A+)
Between a valve and a pushrod, there is a
a. camshaft
b. wrist pin
c. connecting rod
d. rocker arm -
correct answer ✅d. rocker arm
4B07-04-01-07 A simple gas turbine is one without reheaters or:
a. Starting motors
b. Compressors
c. Combustors
d. Regenerators -
correct answer ✅d. Regenerators
4B07-04-01-08 An essential auxiliary in a gas turbine installation is:
a. an air heater
,Power Engineering - 4B7 Practice
Exam Questions & Answers (Grade
A+)
b. a generator
c. a water injection system
d. a starting motor -
correct answer ✅d. a starting motor
In a diesel engine, an injection nozzle is used for ___________
a. Lubricating the journal bearings
b. Scavenging the cylinder
c. Igniting the fuel.
d. Atomizing the fuel. -
correct answer ✅d. Atomizing the fuel.
During a single rotation of a 4-stroke cycle gasoline engine
crankshaft, the engine undergoes
a. a power stroke, immediately followed by an exhaust stroke
b. an intake stroke, immediately followed by an exhaust stroke
c. a compression stroke, immediately followed by an exhaust stroke
,Power Engineering - 4B7 Practice
Exam Questions & Answers (Grade
A+)
d. an intake stroke, immediately followed by a power stroke -
correct answer ✅a. a power stroke, immediately followed by an
exhaust stroke
On steam turbines, carbon glands are:
a. Lubricated by the main oil pump
b. Lubricated by the seal oil pump
c. Lubricated by governor oil
d. Self-lubricating -
correct answer ✅d. Self-lubricating
Excessive wind velocity in a natural draft cooling tower may cause:
a. Damaged louvres
b. High drift losses
c. Unstable sump water level
d. Over-cooling of the water -
correct answer ✅b. High drift losses
, Power Engineering - 4B7 Practice
Exam Questions & Answers (Grade
A+)
4B07-04-01-02 The combustion chamber of a gas turbine:
a. increases the density of the compressed air.
b. must be water cooled to protect against high temperature.
c. is where fuel is added to air, and burned.
d. preheats the combustion air before it is compressed. -
correct answer ✅c. is where fuel is added to air, and burned.
A gas turbine compressor:
a. is always an axial compressor
b. can be driven by the load turbine
c. must be intercooled
d. must be a multi-stage compressor -
correct answer ✅b. can be driven by the load turbine
Water is removed from the air stream leaving a cooling tower, using
