• NG based explosives
• Slurry explosives
• Emulsion explosives
• Gun powder

• Detonating fuse >> Safety fuse
• Detonating fuse << safety fuse
• Detonating fuse = Safety fuse
• Detonating fuse < safety fuse

• ASA and PETN
• Ammonium nitrate and PETN
• ASA and Ammonium nitrate
• None of these

P. Drag cut             1. Parallel cut
Q. Burn cut            2. Horizontal half wedge cut
R. Pyramid cut      3. Vertical half wedge cut
S. Fan cut               4. Double wedge cut

• P-1, Q-2, R-3, S-4
• P-2, Q-1, R-4, S-3
• P-3, Q-1, R-4, S-2
• P-4, Q-1, R-3, S-2

• Burn cut
• Pyramid cut
• Fan cut
• Coromant cut

• Burn cut
• Pyramid cut
• Wedge cut
• Fan cut

• Rotary-percussive drilling
• Percussive drilling
• Rotary drilling
• Hydraulic drilling

• Collar
• Heading
• Inset
• Scaffold

• cross bit
• button bit
• rotary roller bit
• button drag bit

• Bit
• Drill
• Adaptor
• None of these