ASSIGNMENT 3
Textbook Assignment: “Steam Catapults,” Pages 4-1 through 4-67.
3-1.
What are the most significant differences
among the various types of steam catapults?
1.
Power strokes and lengths
2.
Endspeeds and power strokes
3.
Endspeeds and launching capacities
4.
Lengths and launching capacities
3-2.
What switch or valve controls the flow of
steam from the ship's boilers to the catapult's
wet-steam accumulator?
1.
The steam launching valve
2.
The capacity selector valve
3.
The steam fill valve
4.
The steam pressure cutoff switch
3-3.
How far must the launch valve control assem-
bly crosshead travel to stop the number 2
launch valve stroke timer clock?
1.
3 1/2 in.
2.
6 in.
3.
9 in.
4.
11 1/2 in.
3-4.
What device controls the opening rate of the
launch valves to allow the launching of various
types and weights of aircraft?
1.
The launch valve control valve
2.
The capacity selector valve
3.
The launch valve stroke timers
4.
The steam pressure cutoff switch
3-5.
What mechanism prevents a steam buildup be-
hind the launching engine steam pistons?
1.
The exhaust valve
2.
The pressure-breaking orifice elbow
3.
The exhaust valve keeper valve
4.
The wet-steam accumulator
3-6.
The exhaust valve hydraulic lock valve con-
trols the flow of fluid to which of the following
components?
1.
The steam pressure cutoff switch
2.
The pressure breaking elbow
3.
The exhaust valve limit switch
4.
The exhaust valve hydraulic actuator
3-7.
What determines the number of launching cyl-
inders that are mounted in the catapult trough?
1.
Overall length of the catapult
2.
Required amount of elongation for the type
of catapult
3.
Number of base pads in the trough
4.
Number of lubricator nozzles required for
the type of catapult
3-8.
What function is provided by the cylinder co-
vers of the launching engine?
1.
Eliminates the need for external bracing of
the trough covers and track assembly
2.
Prevents steam from escaping through the
cylinder slots during the power stroke
3.
Prevents steam pressure from spreading
the cylinder in the area of the cylinder slot
4.
Provides a means of connecting the shuttle
to the piston assemblies
3-9.
What force maintains the tension on the cata-
pult launching engine cylinder sealing strip?
1.
Hydraulic pressure
2.
Spring tension
3.
Steam pressure
4.
Air pressure
3-10.
What component serves as the chassis for the
other
components
of
the
steam
piston
assembly?
1.
The spear
2.
The barrel
3.
The connector
4.
The support guide
3-11.
What prevents the loss of steam from behind
the
steam
piston
assemblies
during
the
catapult's power stroke?
1.
Segmented seals
2.
Piston rings
3.
The piston barrel
4.
Bushings
13
