Explore topic-wise MCQs in Graduate Aptitude Test (GATE).

Mahatama Gandhi was known for his humility as

The Headmaster ___________ to speak to you. 

Which of the following options is incorrect to complete the above sentence?

If 3 ≤ X ≤ 5 and 8 ≤ Y ≤ 11 then which of the following options is TRUE?

The uniaxial compressive strength of a limestone sample is 80 MPa. The sample is confined at a pressure of 20 MPa in a triaxial compressive strength test. Based on Hoek-Brown failure criteria the maximum principal stress at failure in MPa is 

(consider rock constants as m = 7.88, s = 1.0 and a = 0.5)

A cylindrical rock specimen of diameter 54 mm has Young’s modulus of 68.97 GPa and Poisson’s ratio of 0.35. The rock specimen fails in uniaxial compression at a lateral strain of 0.01%. The axial load at failure in kN is __________

 For a shrinkage stope the following data values are given

Insitu tonnage                   9000 tonne

Insitu grade                       5.2 g/tonne

Average grade of waste  1.4 g/tonne

Loss of ore in the stope  10%

Dilution                              20%

The grade at the mill-head in g/tonne is ________

In an experiment to study coal dust explosibility, it is found that at least 3.0 g of limestone dust should be added to a sample of 2.0 g of coal dust to ensure that propagation of flame does not take place. The explosibility factor of coal dust is

 Two meshing spur gear wheels of Module 6 have 24 and 42 teeth. The distance in mm between the centres of the gear wheels is

In a belt conveyor system, function of the snub pulley is to

Under standard temperature and pressure conditions the theoretical maximum height in m to which water can be lifted using an air-lift pump is

 The number of ways in which the letters in the word MINING can be arranged is

An emulsion explosive of specific gravity 1.25 is used for blasting in an iron ore formation having P-wave velocity of 3000 m/s and specific gravity of 3.20. For an explosive impedance to rock impedance ratio of 0.5, the desired velocity of detonation of the explosive in m/s is

Identify the correct statement for a ‘normal distribution’.

 Among the following options, the specific energy for rock-drilling is lowest in

Events A and B are independent but NOT mutually exclusive. If the probabilities P(A) and P(B) are 0.5 and 0.4 respectively, then P(A ∪ B) is

The pressure on a phreatic surface is

Incubation period is NOT related to

 Transit theodolite is a

 Rill stoping method is a form of

Long-hole drilling with crater blasting is used for the construction of

For a 25 mm diameter spherical charge, the maximum allowable charge length in cm is

In the Moh’s scale of hardness, the minerals in increasing sequence of hardness are

If the transpose of a matrix is equal to its inverse, then the matrix is

In the Coward flammability diagram, the respective percentages of methane and oxygen at the nose limit are

The size of the Theodolite is defined according to the:

 The ore reserves for which tonnage and grade are computed party from specific
Measurements and partly from projection for a reasonable distance on geologic evidence is
Known as:

“Minimum stopping width" is the:

The purpose of the bulk sampling of the coal is:

 Coning and quartering is:

When the material collected to represent a rock type, or a formation or an ore body in
the quantitative sense then it is termed as:

Drift mining is generally employed:

Horizon mining for coal winning is more suitable where:

The mining methods adopted in Rakha copper mine:

Long wall method is:

The width of the ore body which can be economically mined is:

 Long wall method is generally employed for:

 Choose the most suitable answer for Gathering:

Strip mining is a method of:

Minimum metal percentage, at which mining is profitable, is known as

 The openings in the mini, which serve as a means of entry is known as:
 

 Snake holes are:

The mining terminology, exploitation or winning is:

Blasting gelatin is made up of:

The drill holes which are driven vertically and make the sides of the excavation are
Described as:

High explosives containing:

"Salting" of an ore is done:

 The grade which is available from a property after actual mining is:

The spacing of the trenches pits and boreholes depend on:

Grab sampling consists in: