Q721
Open questionThe first barrier also 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
37/46
Page
Pick an option on a question to see the right answer and solution.
Q722
Open questionMethane drainage was first attempted in which mine.
Select an option to see the answer and solution.
Q723
Open questionThe type of apparatus used to administer pure O2 to an unconscious person or to whome breathing is feeble called . . . . . . . .
Select an option to see the answer and solution.
Q724
Open questionANFO is used in
Select an option to see the answer and solution.
Q725
Open questionA roadway driven along dip of seam.
Select an option to see the answer and solution.
Q726
Open questionMargin of safety usually equals to . . . . . . . . of the depths in case 1 'O' Donhue's formula for shaft pillar.
Select an option to see the answer and solution.
Q727
Open questionIt is the instrument used to testing continuity of an electric circuit for blasting
Select an option to see the answer and solution.
Q728
Open questionCrawler mounted rocker shovel is best for drifting a drift maximum grident of
Select an option to see the answer and solution.
Q729
Open questionIf the gas mask or self rescuer used in atmosphere containing more than 2% CO what happens.
Select an option to see the answer and solution.
Q730
Open questionNatural ventilation pressure assists the fan ventilation pressure in case of . . . . . . . .
Select an option to see the answer and solution.
Q731
Open questionEach oxygen cylinder in Novex reviving apparatus containing . . . . . . . . litter of O2 charged to . . . . . . . . atmospheres.
Select an option to see the answer and solution.
Q732
Open questionMucking means
Select an option to see the answer and solution.
Q733
Open questionTo avoid freezing of NG explosive which agent is mixed.
Select an option to see the answer and solution.
Q734
Open questionMaximum or shut off head developed by centrifugal fan when
Select an option to see the answer and solution.
Q735
Open questionThe formula for theoretical depression of axial flow fan will be
Select an option to see the answer and solution.
Q736
Open questionThe self rescuer can be used for . . . . . . . . hours.
Select an option to see the answer and solution.
Q737
Open questionCoal mines are said to be steep if the inclination in between.
Select an option to see the answer and solution.
Q738
Open questionMain purpose of tippler
Select an option to see the answer and solution.
Q739
Open questionCooling chamber of protomark IV apparatus made of . . . . . . . .
Select an option to see the answer and solution.
Q740
Open questionCO2 absorbent keeps the percentage of CO2 in breathing circuit below . . . . . . . .% in proto mark IV apparatus.
Select an option to see the answer and solution.