Q601
Open questionFind the watergauge required to pass 1500 m3 of air/min through an air way of 2.5 × 3 m cross section and 2000 m long.
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
31/46
Page
Pick an option on a question to see the right answer and solution.
Q602
Open questionEarth quake loading frequency is about. . . . . . . . .
Select an option to see the answer and solution.
Q603
Open questionA building where explosives and detonators are stored is called
Select an option to see the answer and solution.
Q604
Open questionSelf contained breathing apparatus used in our mines are of well known makes
Select an option to see the answer and solution.
Q605
Open questionLow mixture of methane burn in air producing . . . . . . . . flame.
Select an option to see the answer and solution.
Q606
Open questionThe example for High density explosives
Select an option to see the answer and solution.
Q607
Open questionWhat happens of the booster fan is placed too for inbye of the neutral point in either intake or return.
Select an option to see the answer and solution.
Q608
Open questionAs per the statute the key of the firing apparatus shall be retained throughout the shift in the possession of
Select an option to see the answer and solution.
Q609
Open questionIn no case shall the well insulated cable be less than A m long as per CMR 2017. A is given by
Select an option to see the answer and solution.
Q610
Open questionIn case of steep seam the shape of pillar should be . . . . . . . .
Select an option to see the answer and solution.
Q611
Open questionThe percentage of recovery in BG method is . . . . . . . .
Select an option to see the answer and solution.
Q612
Open questionInflammability of coal dust increase almost . . . . . . . . proportional to the percentage of fire damp present in atmosphere.
Select an option to see the answer and solution.
Q613
Open questionWhat do you mean by mechanical efficiency of a fan.
Select an option to see the answer and solution.
Q614
Open questionIt involves the measurement of air velocity and quantity of air flowing in various parts of the mine called . . . . . . . .
Select an option to see the answer and solution.
Q615
Open questionA roadway driven in coal seam called . . . . . . . .
Select an option to see the answer and solution.
Q616
Open questionIncubation period of coal is judged by . . . . . . . .
Select an option to see the answer and solution.
Q617
Open questionAmmonium nitrate is comes under
Select an option to see the answer and solution.
Q618
Open questionNo drill shall be used for boring a shot hole unless it allows a clearance of at least "A" em over the diameter of the explosive cartridge. A is given
Select an option to see the answer and solution.
Q619
Open questionThe minimum pillar to pillar distance of the depth of the seam is 150 m and gallery width is 3.6 m.
Select an option to see the answer and solution.
Q620
Open questionMeen air temperature of a 450 m deep down cast shaft is 29°C and that of the up cast shaft is 37°C, the height of the motion column m is . . . . . . . .
Select an option to see the answer and solution.