List of top Questions asked in TS PGECET

Depending upon the decreasing ability of surrounding rock to store strain energy in underground metal mining methods can be ordered as
The strength of standard wire rope is proportional to
A low-grade steep-seated ore body dipping at \(70^\circ\) has a strike length of \(2\ \text{km}\) and width \(100\ \text{m}\). The ore body and wall rocks are weak and fractured. The preferred method of mining is
Emulsion explosive is a mixture of
In a cut-and-fill stope, the main purpose of backfilling is to
The 'ratchet and pawl' mechanism in a jack hammer drill
In a belt conveyor system, the function of the snub pulley is to
The equipment used for both drop cut and terrace cut in surface mining is
Economic depth of surface mining primarily depends on
The factor of safety of a coal pillar decreases with
Post-pillar method of stoping is a variant of
For highwall mining, web pillar design is governed mainly by
Which one of the following ropes cannot be an effective cable bolt?
What is the formula for Factor of Safety?
A cylindrical sample of cross-sectional area \(A\), length \(L\), and Young's modulus \(E\) is subjected to a constant uniaxial load \(P\). Within the elastic limit, the expression for the total strain energy \((U)\) stored in the sample is
A borehole log of \(1.2\ \text{m}\) in length has recovered rock cores of lengths \(20,\ 8,\ 15,\ 8,\ 8,\ 4,\ 3,\ 9,\ 10,\ 1,\ 5,\) and \(10\ \text{cm}\). The RQD (in percentage) is
A multi-point borehole extensometer is used to monitor
The size distribution of soil is known as
Barton classified the rock mass on the basis of
When the two principal stresses are equal and are alike, the resultant stress on any plane is
The ratio of the specific weight of an intact rock to that of loose rock is
Massive sandstone in immediate roof delays the local fall in goaf of a coal mine. Under this condition crushing of the pillars at outbye side is called
Maximum shear stress in a Mohr's Circle is
Increase in moisture content of rock
The angle of draw in a trough subsidence helps in