DeWalt 52051 Guide D'utilisation page 15

Operator's Name
Home Address
Date of Birth
Company Name
Company Address
Company Phone
Signature
Check the correct answer.
1. It is necessary to read the Instruction Manual prior to
operating a D WALT low velocity tool.
e
o True
o False
2. When fastening into concrete, the base material should
be greater than the shank penetration by at least:
o 1 time
o 2 times
o 3 times
3. When operating a powder actuated tool, your hand
should never be placed:
o Around the tool body
o In front of the tool muzzle
o Over the tool handle
4. To determine the suitability of a base material, use the
fastener as a center punch.
If the fastener is blunted, do not fasten; the material
is too:
o Soft
o Hard
o Brittle
If the fastener penetrates easily, do not fasten; the
material is too:
o Soft
o Hard
o Brittle
If the material cracks or shatters, do not fasten; the
material is too:
o Soft
o Hard
o Brittle
QUALIFIED TOOL OPERATOR EXAMINATION
Date
Age
Date
5. Unsafe applications for powder‑actuated tools may be
caused by which of the following?
o A soft base material
o Improper powder load
o Fastening too close to an unsupported edge
o A malfunctioning tool
o Fastening into a spalled area
o Fastening through a pre‑existing hole
o All of the above
6. Which one of the following building materials is not
suitable as a receiving material (base material) for
powder‑actuated fasteners?
o Sheet rock
o Wood
o Fiberglass
o Sheet metal
o All of the above
7. When considering the safety of a particular application,
the operator must think about:
o The base material
o The powder load power level
o The operator's safety
o The safety of bystanders and fellow workers
o All of the above
8. The proper loading procedure is: insert fastener first,
powder load second. The fastener should always be
placed in the tool prior to the load.
o True
o False
9. Which one of the following materials is usually suitable
for powder‑actuated fastenings?
o Poured concrete
o Hollow tile
o Surface hardened steel
o Glazed brick
10. In concrete, a fastener should be driven no closer to an
unsupported edge than:
o 1/2" (13 mm)
o 1‑1/2" (38 mm)
o 3" (76 mm)
11. Fishhooking is a condition which can occur when
a powder‑actuated fastener strikes a piece of hard
aggregate or very hard concrete, bends and comes out
of the work surface. A fishhook can cause a serious injury
or death.
o True
o False
12. Placing a hand over the muzzle bushing of a loaded tool
can result in serious injury from piston overdrive or an
escaping fastener if the tool is discharged accidentally.
o True
o False
English
13