PRACTICE EXERCISE
ANSWER KEY AND FEEDBACK
Item
Correct Answer and Feedback
1.
C. 3.
This is a mandatory requirement for safety reasons as
stated in part A, paragraph 7.
2.
A. 50 feet. This is a mandatory requirement so that an accurate
reading can be obtained. Part A, paragraph 9.
3.
B. Aluminum paint.
Aluminum paint presents a sparking hazard.
Part B, paragraph 4, page 9.
4.
D. With properly grounded conductive material. All areas within
an operating room requiring conductive floors and shoes must be
grounded to include exposed table tops where explosives or dust
may be encountered. Part B, paragraph 6, c.
5.
C. Intraline distance.
Intraline distance is the minimum
distance in feet that a operation containing more than 70 pounds
(Net Explosive Weight) can be from an adjoining operation. Part
C, paragraph 3, d.
6.
B. 25 feet.
This is maximum distance in feet that a work
station can be from the exit door to give the operator a safe
exit from the building in case of an explosion.
Part C,
paragraph 1.f.
7.
D. As close as possible. In a shielded operation using machines
such as a pull-apart device, the deluge system must be positioned
to put out a fire in case of an explosion. Part C, paragraph 10.
8.
D. Finger print neutralizer.
Finger print neutralizer must be
used to clean the gages because the natural acids on a person's
hands will effect the measurement of the gage. Part D, paragraph
3, d (3).
9.
A. 230 degrees F. The sweeping compound must have a flash point
of at least 230 degrees because the static electricity generated
by cleaning the floor containing exposed explosives might cause a
fire or explosion. Part D, paragraph 4.b.(4).
25
MM4673
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