Stone dust barriers in underground coal mines are used to arrest

The correct sequence of attachments between the winding rope and the cage in a drum winding system is

The functions of automatic contrivances in a winding system are to prevent

A low-grade deep-seated ore body dipping at 70° has a strike length of 2 km, and width of 100 m. The ore body and wall rocks are weak and fractured. The preferred method of mining is

The availability of water in the root zone for plant use is maximum in the case of

If the time to failure of a machine component is exponentially distributed, the reliability of the same at Mean Time To Failure (MTTF), (rounded off to three decimal places), is ______.

The major and minor principal stresses at a point are 25 MPa and -5 MPa respectively. The maximum shear stress, in MPa at that point is ______.

For a function $f(x)$, $f(1) = 5$ and $f'(1) = -5$. Ignoring all higher order terms in Taylor series, the value of the function at $x = 1.01$ (rounded off to two decimal places) is ______.

Proximate analysis of a coal sample gives 2.46% moisture, 25.73% volatile matter, and 42.89% ash. The volatile matter of the coal sample, in percentage, on dry ash free (daf) basis (rounded off to two decimal places) is ______.

A coarse sand aquifer has porosity 20% and hydraulic conductivity $3.5 \times 10^{-3}$ m/s. If the hydraulic gradient is 0.00423 (m/m), then the average linear velocity of the groundwater in mm/s, (rounded off to three decimal places) is ______.