1-63.
1-64.
1-65.
1-66.
1-67.
1-68.
Before opening a main reduction gear
(MRG) cover, you should take all
EXCEPT which of the following
precautions?
1.
Drain the LO sump
2.
Post a security watch
3.
Clean the areas around the
covers
4.
Obtain the chief engineers
permission
Backlash is best described by which
of the following statements?
1.
Clearance of the gears that do
not mesh
2.
Clearance of the gears operating
in parallel
3.
Play between the surfaces of the
teeth in mesh
4.
Radial play between the pinion
teeth and bearings
When pinion and gear teeth have been
slightly indented by foreign
material, what action should you
take?
1.
Closely monitor the damage to
see if it spreads
2.
Remove both gears for a complete
overhaul
3.
Remove the raised metal on the
damaged teeth
4.
Remove the raised metal on both
gears
When performing a static check to
determine tooth contact, you should
use which of the following compounds
to coat the gear teeth?
1.
An indelible marker
2.
Copper sulfate
3.
Persian blue
4.
Prussian blue
Corrective pitting along the pitch
line may occur during which of the
following periods of service?
1.
During full-power operation
2.
During prolonged operation
3.
During the first few months of
operation
4.
During excessive operation at
low power
When determining offset alignment
readings, manufacturers take into
account all EXCEPT which of the
following factors?
1.
Speed of the installation
2.
Thermal expansion of the MRG
3.
The hydrodynamic oil film effect
4.
Thermal expansion of the
foundation
1-69.
The line shaft (spring) bearing
(LSB) used on gas turbine ships is
what type of bearing?
1.
Prealigned, self-lubricated
bearing
2.
Nonaligned, pressure lubricated
bearing
3.
Self-aligning, oil-lubricated
roller bearing
4.
Self-aligning, oil-lubricated
journal bearing
1-70.
On the LSB, where are the original
installation clearance readings
located?
1.
On the lower bearing housing
2.
On the upper bearing housing
3.
On the base support
4.
On the side cover
1-71.
How are the stern tube and strut
tube bearings cooled?
1.
By heat-dissipating fins
2.
By air from the masker air
system
3.
By fresh water
4.
By seawater
1-72.
The temperature-compensated pitch
indicating system depends on the
thermal stability of which of the
following transmitting mediums to
sense pitch position?
1.
Seawater
2.
Prairie air
3.
Masker air
4.
CRP oil
1-73.
The electronic pitch position
transducer is located in what area?
1.
Inside the CRP electronics
enclosure
2.
On the right side of the OD box
3.
On the front end of the OD box
4.
Inside the propeller hub
1-74.
A steady increase in hub
servopressure, without a change in
system demands, is a good indication
that which of the following
components is faulty?
1.
Auxiliary relief valve
2.
Sequencing valve (closed
position)
3.
Reducing valve
4.
Electrohydraulic servo valve
6
