EXERCISE
16.
Which are the three strengths in which pipe is available?
a.
Strong, extra strong, and double extra strong
b.
Strong, medium strong, and regular
c.
Regular, strong, and extra strong
17.
Which type of copper tubing is mainly used in hot water systems?
a.
K
b.
L
c.
M
18.
Which type of copper fitting is most widely used?
a.
Compression
b.
c.
Drain, waste, and vent
19.
Which type valve uses a ball system to prevent reversal of flow in the line?
a.
Stop valve
b.
Angle valve
c.
Check valve
20.
Which measurement is used to measure a piece of pipe having a fitting screwed
on one end only?
a.
Face-to-end
b.
Center-to-center
c.
End-to-end
21.
What would be the thread engagement for a 1-inch pipe?
a.
1/2 inch
b.
9/16 inch
c.
5/8 inch
6.
BENDERS.
a. Copper and brass. Benders are designed to facilitate bending brass or
copper pipe and tubing. Benders issued through the Army supply system are of the
spring type sized to fit pipe and tubing ranging from 1/4 to 1 inch in diameter
(fig 13). A tube bender is used to prevent tubing from kinking or flattening out
at the desired bend. To use a bender, push it over the tube until the center of
the bender is centered over the point in the tube where the bend is to be made.
The tube can then be bent by hand to the desired radius. Pull the bender from the
tube after bending.
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