Mine Supports And Strata Control - Study Mode

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[#176] In case of weak rock over lain by strong rock, the bolt installed through them will act in

(A) Beam

(B) Consolidation

(C) Suspension

(D) Keying

Correct Answer

(C) Suspension

[#177] The widely acceptable theory behind roof bolt is

(A) Beam theory

(B) Kestone theory

(C) Suspension theory

(D) Pressure theory

Correct Answer

(A) Beam theory

[#178] A support with combination of sleepers above one another in a cris-cross manner

(A) Saffaric support

(B) Chock

(C) Arch

(D) Stull

Correct Answer

(B) Chock

[#179] In high stress zone, the shape of the shaft cross section should be

(A) Square

(B) Circular

(C) Rectangular

(D) Parallelogram

Correct Answer

(B) Circular

[#180] The length of wedge used in slot and wedge type bolt

(A) 100 m

(B) 125 m

(C) 150 m

(D) 175 m

Correct Answer

(C) 150 m