(2024 Exam) Demo

Question 1

How many blasting cap can the Blasting Cap Container MK 663 Mod hold?

Answer 1

10

Question 2

How many charge-fire cycles will the Blasting Machine CD450-4J be able to do on one alkaline battery?

Answer 2

The battery will last more than 350 cycles.

Question 3

How much voltage is created by the CD450-4J?

Answer 3

450V

Question 4

How far shall blasting container be separated from explosives?

Answer 4

25 feet.

Question 5

Do not keep more than ____ blasting caps at the priming site at any one time?

Answer 5

100

Question 6

When using electric blasting caps or non-electric detonators, wait ___ minutes after initiation when approaching a misfire?

Answer 6

30 mins

Question 7

For non-electric blasting caps and time fuse wait ___ min after a misfire?

Answer 7

60 mins

Question 8

Prior to inserting safety fuse into a blasting cap, cut off at least ____ to ____” to insure a dry end.

Answer 8

1/8-inch to 1/4-inch

Question 9

Do not crimp blasting cap more than ___inch from its open end.

Answer 9

1/4”

Question 10

Military dynamite is usually satisfactory for bottom alteration. Composition C-4 should be used for excavation of_____ ____. A ______ brisance explosive is more effective in limestone and other soft rocks.

Answer 10

Hard rock. A lower brisance explosive is more effective in limestone and other soft rocks.

lower

Question 11

Trenching and tunneling in loose rock, clay, sand, or mud are best accomplished with what techniques?

Answer 11

a water jet, an air lift, or a combination of the two.