Demolitions

Question 0

What length is detonating cord issued?

Answer 0

70m

Question 1

What is the weight of a PE7 block

Answer 1

500g

Question 2

What length of safety fuze is on a new reel and what is the maximum length that can be used on demolitions from a new reel?

Answer 2

8m

7.1m

Question 3

Explain the testing procedure for safety fuze

Answer 3

Cut off the first 300mm, discard.
Burn the second 300mm- must burn for between 35-43 seconds.
Discard if outside these parameters.
Cut off the last 300mm and discard.

Question 4

What are the two lengths of tail that can be used when using det cord?

Answer 4

100mm with grommet

300mm without

Question 5

State what D1 through to D6 are

Answer 5

D1- electrical
D2- non electrical
D3- combination 
D4- store's own
D5- simultaneous (3 methods)
D6- burn

Question 6

When making det cord joints with tape what length should the joint be?

Answer 6

100mm

Question 7

How many detonators are in a black box?

Answer 7

2

Question 8

What is the difference between the black box for electric detonators and flash detonators?

Answer 8

Electric dets box will have an embossed ‘E’ on base of box. Igneferous dets will have a smooth box base.