Prime Movers Flashcards
(13 cards)
R4B07-05-01-02 The fuel for a diesel engine is:
Select one:
a.
admitted to the cylinder during the intake stroke
b.
mechanically atomized by high pressure
c.
fed to the carburetor under pressure
d.
mixed with air in the intake manifold
b.
mechanically atomized by high pressure
R4B07-02-03-03 Steam turbine governors:
Select one:
a.
Prevent the turbine from over speeding
b.
Regulate the speed of the turbine automatically
c.
Should be checked annually by the boiler inspector
d.
Are not required on reaction turbines
b.
Regulate the speed of the turbine automatically
Which component regulates engine speed when load requirements change?
a.
Inertia governor
b.
Governor
c.
Crosshead
d.
Fly wheel
b.
Governor
R4B07-05-05-02 A reduction in sealing between the piston rings and the cylinder wall may be the result of:
Select one:
a.
Low cooling water temperature
b.
High oil viscosity
c.
High coolant temperature
d.
High carbon residue in the oil
c.
High coolant temperature
If the turbine speed exceeds a pre-determined RPM, what will the overspeed trip device do?
a.
Reduce the turbine speed immediately
b.
Reduce the fuel flow to the combustor to a safe level
c.
Trip the air compressor immediately
d.
Cut off fuel immediately
d.
Cut off fuel immediately
R4B07-02-03-02 A turbine overspeed trip:
Select one:
a.
Trips the turbine if it is overloaded
b.
Is installed on all turbines
c.
Can be adjusted according to the load demand
d.
Disconnects the turbine load if the turbine overspeeds
b.
Is installed on all turbines
4B07-04-01-05 A closed cycle gas turbine:
Select one:
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
4B07-04-01-06 A gas turbine is most efficient when:
Select one:
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.
What does the rate of heat transfer depend on in any cooling tower system?
a.
The amount of time the air and water are in contact
b.
The difference between the relative humidity of the inlet air and the relative velocity
c.
The difference between the temperature of the water in and the temperature of the air out.
d.
The volume and temperature of the make-up water
a.
The amount of time the air and water are in contact
R4B07-05-02-03 A two-cycle gasoline engine:
Select one:
a.
produces twice the power of a four cycle
b.
must have two cylinders
c.
requires exhaust valves
d.
is simpler than a four cycle engine in construction
d.
is simpler than a four cycle engine in construction
R4B07-02-02-05 Turbine lubricating oil:
Select one:
a.
Contaminates the exhaust steam
b.
Must mix well with water
c.
Can be used to operate the turbine governor
d.
Lubricates the labyrinth gland
c.
Can be used to operate the turbine governor
When do high-speed automotive diesel engines run best?
a.
When cooling water temperatures are near ambient temperature
b.
When cooling water temperatures are near boiling point
c.
When cooling water temperatures are lower
d.
When cooling water temperatures are near freezing point
b.
When cooling water temperatures are near boiling point
R4B07-05-01-03 Internal combustion engines that drive gas compression machinery, and burn natural gas, operate on the ________ cycle.
Select one:
a.
Rotary
b.
Variable heat
c.
Two or four stroke
d.
Brayton
c.
Two or four stroke
