Power Engineering - 4B7 UPDATED ACTUAL Questions and CORRECT
Answers
Question: 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
Question: 4B07-04-01-07 A simple gas turbine is one without reheaters or
Correct Answer: a. Starting motors b. Compressors c. Combustors d. Regenerators: d. Regenerators
Question: 4B07-04-01-08 An essential auxiliary in a gas turbine installation is
Correct Answer: a. an air heater b. a generator c. a water injection system d. a starting motor: d. a starting
motor
Question: 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.
Question: 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 d. an intake stroke,
immediately followed by a power stroke
Correct Answer: a. a power stroke, immediately followed by an exhaust stroke
Question: On steam turbines, carbon glands are
Correct Answer: a. Lubricated by the main oil pump b. Lubricated by the seal oil pump c. Lubricated by
governor oil d. Self-lubricating: d. Self-lubricating
Question: Excessive wind velocity in a natural draft cooling tower may cause
Correct Answer: a. Damaged louvres b. High drift losses c. Unstable sump water level d. Over-cooling of
the water: b. High drift losses
Question: 4B07-04-01-02 The combustion chamber of a gas turbine
Correct Answer: 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.: c. is where fuel is added to air, and burned.
Question: A gas turbine compressor
Correct Answer: 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: b. can be driven by the load turbine
Question: Water is removed from the air stream leaving a cooling tower, using a. fill or packing b.
desiccant c. cyclone separators d. drift eliminators
Correct Answer: d. drift eliminators
Question: The purpose of a spark plug is to
Correct Answer: a. Ignite the fuel air mixture in a gasoline engine b. Warm the cylinder of a diesel engine
c. Lower the ignition point of the fuel d. Ignite the air in the cylinder: a. Ignite the fuel air mixture in a
gasoline engine
, Question: The shrouding on the blades of a steam turbine serves to
Correct Answer: a. Cool the blade tips b. Expand the steam like a nozzle c. Change the steam direction d.
Confine the steam to the blades: d. Confine the steam to the blades
Question: When _____________ leached away from cooling tower wood, it is less able to resist decay. a.
sap is b. lignin is c. cellulose is d. natural extractives are
Correct Answer: d. natural extractives are
Question: Cylinder scavenging
Correct Answer: a. Refers to the flow of fuel air mixture into a diesel engine. b. Refers to the removal of
exhaust gases from the cylinder c. May be aided with air injectors to rapidly fill the cylinder d. Is performed
by a special piston ring that removes excessive oil from the cylinder walls: b. Refers to the removal of
exhaust gases from the cylinder
Question: 4B07-04-01-06 A gas turbine is most efficient when
Correct Answer: a. both turbine shafts run at the same speed b. the combustion chamber is kept cool c. the
ambient air temperature is low d. operated at the highest combustion temperature that the construction
materials permit.: d. operated at the highest combustion temperature that the construction materials permit.
Question: The part of a camshaft that converts rotary motion to reciprocating motion is called a. the
pushrod b. the lifter c. the lobe d. the journal
Correct Answer: c. the lobe
Question: When starting a steam turbine it is customary practice to
Correct Answer: a. First, rotate the shaft by hand to see if it turns freely. b. Check the lube oil and start the
lube oil cooler before starting the turbine. c. Close the turbine casing drains and steam trap bypasses until
the turbine is fully warmed. d. Overspeed the turbine to test the operation of the overspeed trip, before
continuing with the turbine warm-up.: b. Check the lube oil and start the lube oil cooler before starting the
turbine.
Question: Turbines often have segmental carbon ring sealing glands that are held in place by
Correct Answer: a. Set screws b. Woodruff keys c. Oil pressure d. Garter springs: d. Garter springs
Question: Four-stroke cycle engine valves are
Correct Answer: a. Operated by camshafts b. Operated by pressure differential c. Often called reed or
channel valves d. Open whenever the piston travels upward: a. Operated by camshafts
Question: Using a compressed air starting motor is a common method of starting
Correct Answer: a. Large stationary diesel engines b. Small two-stroke engines c. Gasoline engines d.
Aircraft engines: a. Large stationary diesel engines
Question: Smaller spark ignition engine use ____________ to vapourize gasoline
Correct Answer: a. Vapourizers b. Atomization c. Electric heaters d. Carburetion: d. Carburetion
Question: 4B07-04-01-05 A closed cycle gas turbine
Correct Answer: a. Does not need a combustion chamber b. Is the most common type of gas turbine c.
Recycles the same working fluid d. Burns fuel with spent exhaust gas.: c. Recycles the same working fluid
Question: A turbine overspeed trip
Answers
Question: 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
Question: 4B07-04-01-07 A simple gas turbine is one without reheaters or
Correct Answer: a. Starting motors b. Compressors c. Combustors d. Regenerators: d. Regenerators
Question: 4B07-04-01-08 An essential auxiliary in a gas turbine installation is
Correct Answer: a. an air heater b. a generator c. a water injection system d. a starting motor: d. a starting
motor
Question: 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.
Question: 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 d. an intake stroke,
immediately followed by a power stroke
Correct Answer: a. a power stroke, immediately followed by an exhaust stroke
Question: On steam turbines, carbon glands are
Correct Answer: a. Lubricated by the main oil pump b. Lubricated by the seal oil pump c. Lubricated by
governor oil d. Self-lubricating: d. Self-lubricating
Question: Excessive wind velocity in a natural draft cooling tower may cause
Correct Answer: a. Damaged louvres b. High drift losses c. Unstable sump water level d. Over-cooling of
the water: b. High drift losses
Question: 4B07-04-01-02 The combustion chamber of a gas turbine
Correct Answer: 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.: c. is where fuel is added to air, and burned.
Question: A gas turbine compressor
Correct Answer: 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: b. can be driven by the load turbine
Question: Water is removed from the air stream leaving a cooling tower, using a. fill or packing b.
desiccant c. cyclone separators d. drift eliminators
Correct Answer: d. drift eliminators
Question: The purpose of a spark plug is to
Correct Answer: a. Ignite the fuel air mixture in a gasoline engine b. Warm the cylinder of a diesel engine
c. Lower the ignition point of the fuel d. Ignite the air in the cylinder: a. Ignite the fuel air mixture in a
gasoline engine
, Question: The shrouding on the blades of a steam turbine serves to
Correct Answer: a. Cool the blade tips b. Expand the steam like a nozzle c. Change the steam direction d.
Confine the steam to the blades: d. Confine the steam to the blades
Question: When _____________ leached away from cooling tower wood, it is less able to resist decay. a.
sap is b. lignin is c. cellulose is d. natural extractives are
Correct Answer: d. natural extractives are
Question: Cylinder scavenging
Correct Answer: a. Refers to the flow of fuel air mixture into a diesel engine. b. Refers to the removal of
exhaust gases from the cylinder c. May be aided with air injectors to rapidly fill the cylinder d. Is performed
by a special piston ring that removes excessive oil from the cylinder walls: b. Refers to the removal of
exhaust gases from the cylinder
Question: 4B07-04-01-06 A gas turbine is most efficient when
Correct Answer: a. both turbine shafts run at the same speed b. the combustion chamber is kept cool c. the
ambient air temperature is low d. operated at the highest combustion temperature that the construction
materials permit.: d. operated at the highest combustion temperature that the construction materials permit.
Question: The part of a camshaft that converts rotary motion to reciprocating motion is called a. the
pushrod b. the lifter c. the lobe d. the journal
Correct Answer: c. the lobe
Question: When starting a steam turbine it is customary practice to
Correct Answer: a. First, rotate the shaft by hand to see if it turns freely. b. Check the lube oil and start the
lube oil cooler before starting the turbine. c. Close the turbine casing drains and steam trap bypasses until
the turbine is fully warmed. d. Overspeed the turbine to test the operation of the overspeed trip, before
continuing with the turbine warm-up.: b. Check the lube oil and start the lube oil cooler before starting the
turbine.
Question: Turbines often have segmental carbon ring sealing glands that are held in place by
Correct Answer: a. Set screws b. Woodruff keys c. Oil pressure d. Garter springs: d. Garter springs
Question: Four-stroke cycle engine valves are
Correct Answer: a. Operated by camshafts b. Operated by pressure differential c. Often called reed or
channel valves d. Open whenever the piston travels upward: a. Operated by camshafts
Question: Using a compressed air starting motor is a common method of starting
Correct Answer: a. Large stationary diesel engines b. Small two-stroke engines c. Gasoline engines d.
Aircraft engines: a. Large stationary diesel engines
Question: Smaller spark ignition engine use ____________ to vapourize gasoline
Correct Answer: a. Vapourizers b. Atomization c. Electric heaters d. Carburetion: d. Carburetion
Question: 4B07-04-01-05 A closed cycle gas turbine
Correct Answer: a. Does not need a combustion chamber b. Is the most common type of gas turbine c.
Recycles the same working fluid d. Burns fuel with spent exhaust gas.: c. Recycles the same working fluid
Question: A turbine overspeed trip
