LESSON 4
PRACTICE EXERCISE
ANSWER KEY AND FEEDBACK
Item
Correct Answer
1.
B.
Safety is of prime importance in the erection and use of ladders and scaffolds.
(page 4-1 introduction para)
2.
C.
The hoisting machines has a lock and brake that are controlled by the painter.
Before leaving the machine, you must remove control handle and lock the brake.
(page 4-26, para 4-5)
3.
C.
When ladders are not in use, store ladders in a sheltered well-ventilated place that
is away from weather elements. To prevent warping, hang ladders on brackets by
the ladders side rails. (page 4-8, para 4-1e)
4.
B.
Lower the scaffold to the ground when it is not in use. (page 4-14, para 4-2c[7])
5.
A.
As soon as the ladder is perpendicular, pull the ladder bottom out from the
building to a distance of one-fourth the working length of the ladder. (page 4-3,
para 4-la[2])
6.
D.
The bowline is used to form a single loop that will not tighten or slip under strain
and can be easily untied. (page 4-18 para 4-3b)
7.
D.
The rolling hitch is used to lower a load slowly. The boatswain's chair is another
important use of the hitch. You can lower yourself by releasing the pull on the
fall line and rolling the knot. (page 4-22, para 4-3i)
8.
C.
Prevent the scaffold from swinging outward after hoisting by lashing it to a
building or a structural wall as soon as possible. (page 4-14, para 4-2c[7])
9.
B.
Do not allow anyone on the ladder with you. If the work requires additional help,
the helper should get another ladder. (page 4-8, para 4-le)
10.
B.
For safe operation, the towers height must not exceed four times its' smallest base
dimension; in addition, the tower must have a guardrail above the working
platform. (page 4-12, para 4-2b[3])
EN0562
4-30
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