6-53. There is a total of how many gears in
the gear type of rotary pump?
6-54. Screw pumps are used mainly to pump
what kind of fluid?
6-55. What is the source of lubrication for
the elements of a rotating pump?
Oil from the fittings
Grease forced between the spur
The liquid handled by the pump
Graphite added to the liquid in the
6-56. Most reciprocating pumps in the Navy
are of what type?
1. Direct acting
2. Indirect acting
3. Horizontal acting
4. Single acting
6-57. What part of a diaphragm pump
converts rotary motion to
1. The drive shaft
2. The camshaft
3. The eccentric connecting rod
4. The centrifugal cam
The liquid in a diaphragm is made to
move by what kind of motion?
Because of the makeup of the liquids
handled by the diaphragm pump,
operator maintenance means frequent
inspection of the
1. suction inlet strainer
2. pressure outlet strainer
3. liquid cylinder
4. debris collector
6-60. In a double-acting pump, what number
of strokes does it take to draw in and
6-61. Which of the following features is
indicative of a low-pressure pump?
The steam piston has a larger
diameter than the plunger in the
The pressure per square inch is
greater in the liquid cylinder than in
the steam cylinder
A small volume of liquid with a
high pressure is discharged
A large volume of liquid with a