ASSIGNMENT 3
Textbook Assignment: “Steam Catapults”; chapter 4, pages 4-1 through 4-76.
3-1.
What are the most significant
differences among the various types
of
1.
2.
3.
4.
steam catapults?
Power strokes and lengths
Endspeeds and power strokes
Endspeeds and launching
capacities
Lengths and launching
3-7.
capacities
3-8.
IN ANSWERING QUESTIONS 3-2 THROUGH 3-4,
SELECT FROM COLUMN B THE SYSTEM THAT
CONTAINS THE COMPONENTS LISTED IN COLUMN
A.
A. COMPONENTS
B. SYSTEMS
3-2.
Launching valve
1.
assemblies
3-3.
Injector nozzles
2.
3-4.
Digital endspeed
indicator magnetic 3.
sensors
4.
Steam
system
Launching
system
Drive
system
Lubrication
system
3-5.
What determines the number of
launching cylinders that are
mounted in the catapult trough?
1.
Type and 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
3-6.
What function is provided by the
cylinder covers 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.
3-10.
3-11.
3-12.
3-13.
What prevents the loss of steam
from behind the steam piston
assemblies during the catapult’s
power stroke?
1.
Sealing strips
2.
Piston rings
3.
The piston barrel
4.
Bushings
What force maintains the tension on
the catapult launching engine
cylinder sealing strip?
1.
Hydraulic pressure
2.
Spring tension
3.
Steam pressure
4.
Air pressure
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
What component serves as a bearing
surface for the piston assembly?
1.
The rubbing strip
2.
The barrel
3.
The piston guide
4.
The strip guide
A total of how many rollers are
mounted on the shuttle frame?
1.
Six
2.
Two
3.
Eight
4.
Four
What component of the water brake
cylinder installation forms the
vortex at the open end of the water
brake cylinder?
1.
The jet ring
2.
The striker ring
3.
The annulus ring
4.
The choke ring
The term “elbow pressure” refers to
what specific pressure?
1.
The basket strainer inlet
pressure
2.
The basket strainer outlet
pressure
3.
The water pressure entering the
water brake cylinder
4.
The pump discharge pressure
12
