D:-Pentaerythritol trinitro
Correct Answer:- Option-C

Question11:-Which of the following statement is correct with respect to permitted
explosives :

A:-P1 - used for delay blasting in solid blasting and in gassy coal seams
B:-P2 - used for delay blasting in solid blasting and in gassy coal seams
C:-P3 - used for delay blasting in solid blasting and in gassy coal seams
D:-P5 - used for delay blasting in solid blasting and in gassy coal seams
Correct Answer:- Option-D

Question12:- is a chemical component having three properties. High
explosive and oxidising agent and cooling agent.

A:-Nitroglycerine

B:-Liquid oxygen

C:-TNT

D:-Ammonium nitrate

Correct Answer:- Option-D
Question13:-Detonating fuse consist core of

A:-PETN

B:-TNT

C:-ASA

D:-AN

Correct Answer:- Option-A
Question14:-The value of 'spacing' is dependent upon

A:-the hold depth, relative primer locations between adjacent charge columns,
and the delay type being used

B:-the burden, hold depth, relative primer locations between adjacent charge
columns, and the delay type being used

C:-the burden, stemming length, relative primer locations between adjacent
charge columns, and the delay type being used

D:-the burden, hold depth, relative primer locations between adjacent charge
columns, and the explosive type being used

Correct Answer:- Option-B

Question15:-The general observations during too wide spacing :
A:-Cause too much crushing and cratering between holes
B:-toe problems between holes
C:-blast vibration and air-blast problem
D:-boulders in the burden region
Correct Answer:- Option-B