21. It is the area of opening through which would pass the same quantity of air as pass through the mine under same pressure called . . . . . . . .
22. Calculate the total resistance for 20 numbers of electric delay detonators connected in parallel, each detonator has resistance of 2 ohms and resistance of connecting wire and blasting cable is 8 ohms and 3 ohms respectively?
23. The qualities of the stone dust should be
24. Primex is the trade name for
25. Which of the following is true for ordinary electric detonator?
26. The gradient from haulage engine to the brow is dipping nearly.
27. Self-rescue breathing apparatus model spiral 2C consists of
28. High moisture and high voltage coals are more subceptiable to . . . . . . . .
29. The basic principle of detonation is more intimate contact between the oxidizer and fuel, the higher is . . . . . . . .
30. Gelatinous and semi gelatinous explosives are used in . . . . . . . .
Read More Section(Drilling and Blasting)
Each Section contains maximum 100 MCQs question on Drilling and Blasting. To get more questions visit other sections.
- Drilling and Blasting - Section 1
- Drilling and Blasting - Section 2
- Drilling and Blasting - Section 4
- Drilling and Blasting - Section 5
- Drilling and Blasting - Section 6
- Drilling and Blasting - Section 7
- Drilling and Blasting - Section 8
- Drilling and Blasting - Section 9
- Drilling and Blasting - Section 10