Q221
Open questionIt is the area of opening through which would pass the same quantity of air as pass through the mine under same pressure called . . . . . . . .
Select an option to see the answer and solution.
Mining Engineering · all questionsDrilling and Blasting
Drilling and Blasting
practice.
Practice every MCQ with options. Use Show answers when you want the correct option and solution.
911
Questions
12/46
Page
Pick an option on a question to see the right answer and solution.
Q222
Open questionCalculate 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?
Select an option to see the answer and solution.
Q223
Open questionThe qualities of the stone dust should be
Select an option to see the answer and solution.
Q224
Open questionPrimex is the trade name for
Select an option to see the answer and solution.
Q225
Open questionWhich of the following is true for ordinary electric detonator?
Select an option to see the answer and solution.
Q226
Open questionThe gradient from haulage engine to the brow is dipping nearly.
Select an option to see the answer and solution.
Q227
Open questionSelf-rescue breathing apparatus model spiral 2C consists of
Select an option to see the answer and solution.
Q228
Open questionHigh moisture and high voltage coals are more subceptiable to . . . . . . . .
Select an option to see the answer and solution.
Q229
Open questionThe basic principle of detonation is more intimate contact between the oxidizer and fuel, the higher is . . . . . . . .
Select an option to see the answer and solution.
Q230
Open questionGelatinous and semi gelatinous explosives are used in . . . . . . . .
Select an option to see the answer and solution.
Q231
Open questionSolid block of coal surrounded all sides by gallaries.
Select an option to see the answer and solution.
Q232
Open questionSurveyor mark reference points by plugs are fixed in roof after every . . . . . . . .m along the centre line.
Select an option to see the answer and solution.
Q233
Open questionThe gradient and direction of drift maintained in the hands of surveyor the instrument is . . . . . . . .
Select an option to see the answer and solution.
Q234
Open questionFires are practically unknown in . . . . . . . . coal mines.
Select an option to see the answer and solution.
Q235
Open questionStone dust used for dusting, should not contain more than . . . . . . . .% silver.
Select an option to see the answer and solution.
Q236
Open questionInclines are usually steeply dipping at
Select an option to see the answer and solution.
Q237
Open questionWhat is the nature of flow of air in mines?
Select an option to see the answer and solution.
Q238
Open questionHow strong is the NONEL tube.
Select an option to see the answer and solution.
Q239
Open questionHaldene apparatus used for
Select an option to see the answer and solution.
Q240
Open questionIn a mine a solid block of rock, which protects the inclines and shafts called as
Select an option to see the answer and solution.