7-12.
When the C/P unit is stabilized, where
Question 7-17 is to be judged True
does the standby pump discharge the
or False.
oil?
7-17.
A 7-year inspection of the main reduction
1.
To the servosystem
gear should be requested and the
2.
To the gravity tank
necessary repairs conducted by a naval
3.
To the lower oil tank
shipyard if alignment trouble is
4.
To the upper gravity tank
suspected.
7-13.
What is the main purpose of the upper
gravity oil tank?
1.
To recycle the control oil
2.
To act as a backup to the CRP system
3.
To maintain a static head pressure
on the hub
4.
To serve as a ready reserve to the
OD box
Learning Objective: Indicate the pro-
cedures to follow when inspecting gears
and related equipment.
7-14.
Before any inspection plate to the main
reduction gear is lifted or opened,
permission must first be obtained
from which of the following personnel?
7-15.
7-16.
1.
Commanding officer
2.
Main propulsion officer
3.
First lieutenant
4.
Engineer officer
Assume the main reduction gear inspection
plates are opened to check the tooth
contact of the pinions and bull gear.
What information should be entered in
the Engineering Log after the inspection
plates are secured?
1.
The name of the officer who witnessed
the closing of the inspection plates
2.
The statement that the inspection
showed no foreign matter had entered
the casing
3.
The statement that the inspection
showed that the oil-spray nozzle
lines were open and clear of any
obstructions
4.
All of the above
Reduction gear inspection plates should
be opened and the gears and oil-spray
nozzles inspected at least once each
7-18.
If a submerged object is struck by a
ship's propeller, when should the main
reduction gear be inspected?
1.
Immediately
2.
After the ship is drydocked
3.
After the ship is docked or anchored
4.
When it shows signs of malfunctioning
7-19.
When should the flexible couplings
between turbines and reduction gears be
inspected?
1.
Prior to full power trials
2.
After a full power trial
3.
Prior to shipyard overhaul
4.
During shipyard overhaul
7-20.
Which of the following operations is NOT
usually carried out just before a full
power trial?
1.
The opening of the gear casing
2.
The inspection of the contact of
the gear teeth
3.
The checking of the operation of
the oil-spray nozzles
4.
The inspection of the oil-spray
nozzle strainers
7-21.
A 2-hour full power trial has just been
completed and you are directed by proper
authority to check the main gear. Which
of the following actions will you take?
1.
Inspect the main thrust bearing
clearance
2.
Inspect the gear tooth contact
3.
Inspect the condition of the gear
teeth
4.
Each of the above
Learning Objective: Point out the
safety precautions which are applicable
to reduction gears, shafts, and bearings.
1.
week
2.
month
3.
quarter
4.
year
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