ASSIGNMENT 6
Textbook Assignment:
“Instruments,” Shipboard Electrical Equipment,”
Controls,”
chapters 11, 12, and 13, pages 11-1
6-1.
6-2.
6-3.
6-4.
In a shipboard engineering plant,
the instruments let operating
personnel perform which of the
following tasks?
1.
Determine if machinery is
operating within a prescribed
range
2.
Determine the operating
efficiency of the plant
3.
Provide data for reports and
records
4.
Each of the above
On a pressure gauge, the red hand
(if installed) should be set at
what point?
1.
Zero
2.
Slightly above the maximum
normal operating pressure only
3.
Slightly below the minimum
normal operating pressure only
4.
Slightly above or slightly
below the maximum or minimum
normal operating pressure
A Bourdon-tube gauge operates on
what principal?
1.
Volume changes in a straight
tube tend to expand the tube
2.
Volume changes in a coiled tube
tend to collapse the tube
3.
Pressure in a straight tube
tends to bend the tube
4.
Pressure in a curved tube tends
to straighten the tube
If a curved Bourdon tube is used to
measure pressure that exceeds 200
psi, it is made from what metal?
1.
Copper
2.
Bronze
3.
Steel
4.
Lead
and “Environmental
through 13-7.
6-5.
In a simplex gauge, the free end of
the Bourdon tube is attached to the
indicating mechanism by a
1.
linkage assembly
2.
wire
3. cam
4.
bellows assembly
6-6.
You would use a simplex Bourdon-
tube gauge if you were taking which
of the following measurements?
1.
The water depth in a freshwater
tank
2.
The amount of fuel oil flowing
through a valve
3.
The pressure in a compressed
air system
4.
The pressure drop between the
inlet and the outlet side of a
lube oil strainer
6-7.
Vacuum gauges, which are used to
indicate pressures below
atmospheric pressure, have which of
the following units of measurement?
1.
Inches of water
2.
Inches of mercury
3.
Pressure per inch
4.
Pressure per square inch
6-8.
What Bourdon-tube gauge should you
use to take pressure and vacuum
measurements?
1.
Duplex
2.
Simplex
3.
Compound
4.
Differential
6-9.
What type of gauge should be
installed to check the pressure
between the inlet and outlet sides
of
1.
2.
3.
4.
lube oil strainers?
Duplex
Simplex
Compound
Diaphragm
32
