9–32.
A fairlead performs what function
during crane operations?
1.
Keeps the clamshell from
twisting
2.
Guides the drag cable onto
the hoist drum
3.
Guides the boom hoist cable
through the gantry
4.
Supports the pile hammer
during pile–driving operations
9-33.
A drag cable should be lubricated
each time operator maintenance is
performed on a crane.
1.
True
2.
False
Learning Objective:
Recognize the
principles of crane operations.
9-34.
What factor is the cause of most
crane mishaps?
1.
Mechanical error
2.
Operator error
3.
Natural disasters
4.
Design flaws
9-35.
Which of the following
COMSECOND/COMTHIRDNCBINST provides
guidelines for wire rope slings and
rigging hardware used in the NCF?
1.
11200.8
2.
11200.9
3.
11200.11
4.
11200.22
9-36.
Before receiving a license to
operate a crane, operators are
required to attend what total
number of hours of formal classroom
instruction?
1.
8
2.
16
3.
32
4.
40
9-37.
It is very dangerous for personnel
to control crane suspended loads by
their hands instead of a tag line.
1.
True
2.
False
9–38.
Which of the following personnel
has the ultimate responsibility
for a crane lift?
1.
The signalman
2.
The operator
3.
The oiler
4.
The rigger
9-39.
Which of the following forms is
used when performing crane prestart
inspections and is turned in to the
crane crew supervisor at the end of
each day or shift for reviewing and
signing?
1.
An ODCL
2.
A hard card
3.
An Operator’s Inspection Guide
4.
An Operator’s Daily PM report
9–40.
Wire rope should be replaced when
wear has destroyed what fraction
of the original diameter of the
outside individual wires?
1.
1/8
2.
1/3
3.
1/2
4.
2/3
9-41.
Which of the following sockets can
develop only 70 percent of the
breaking strength of the wire rope?
1.
Swage socket
2.
Cappel socket
3.
Spelter socket
4.
Wedge socket
9–42.
“Two-blocking” means hoisting the
hook block sheaves against the boom
tip sheaves.
1.
True
2.
False
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