In volute casing the water velocity gradually . . . . . . . . and pressure energy of water correspondingly . . . . . . . .
A. Decreases, Increases
B. Pressed, Depressed
C. High, Low
D. None
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For AM 50 continuous miner application the rock should posses compressive strength of about . . . . . . . .
A. 800 kgf/cm2
B. 600 kgf/cm2
C. 400 kgf/cm2
D. 200 kgf/cm2
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Safety catches located . . . . . . . . the running position of the cage.
A. Below
B. Bottom of shaft
C. Above
D. None
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Flitting of the gathering arm loader is possible by . . . . . . . . chain.
A. Roller
B. D-links
C. Crawler
D. Ropes
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Keps are provided and used at the . . . . . . . .
A. Pit bottom
B. Shaft mid set
C. Shaft pit top
D. All of these
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The triangular plate of cage is attached to detaching hook by means of . . . . . . . .
A. Rope
B. Cappel
C. Bull chains
D. All of these
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The coal yield per blast by using model 625 Auger drill.
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No special fittings or attachments is attached in .the method of rope jointing.
A. Rope splicing
B. Laying
C. Vulcanizing
D. Prestrancy
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The cross section of the steel guides are usually . . . . . . . .
A. 8 × 10 cm
B. 10 × 20 cm
C. 20 × 20 cm
D. 10 × 10 cm
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In order to increase the stability of a mine car the limiting ratio of the length of the body to its wheel axle base generally remains as . . . . . . . .
A. 1 : 1
B. 2 : 1
C. 3 : 1
D. 5 : 1
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The drills used for high speed drivage of large size drifts and blasting gallery.
A. Jack hammer
B. Jumbo
C. Drifter
D. Stopper
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The slow moving rope haulage is . . . . . . . .
A. Direct
B. Main and tail
C. Gravity
D. Endless
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There is an opening at the centre of the impeller called . . . . . . . .
A. ear
B. eye
C. blade
D. evasee
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A wire rope, round stranded with fibre core has a dia meter of 2.54 cm, using the value of K is 0.36. Find the mass of the rope?
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The king wire in the flattened strand rope is . . . . . . . . cross section.
A. Circular
B. Square
C. Triangular
D. Elliptical
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The curve which shows how much magnitude of one quantity varies with the changes in some other related quantity called . . . . . . . .
A. Characteristic curve
B. Nomial curve
C. Isoclinical curve
D. Tangent curve
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In main and tail rope haulage the length of main rope is . . . . . . . .
A. Twice the length of haulage plane
B. One and half times the length of haulage plane
C. Equal to the length of plane
D. Thrice the length of haulage plane
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Double drum rope haulage installation requires . . . . . . . . roads.
A. Narrow
B. Wider
C. High
D. None
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Pressure per unit area varies directly with . . . . . . . .
A. Volume
B. Head
C. Inclineation
D. Mass
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The direction of laying of wires, in the strand called . . . . . . . .
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