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

When a double ended ranging drum shearer cuts coal in a longwall face,

The three segments, whose synchronous functioning is essential for GPS operations, are

Apart from mining of coal, the longwall mining method has been practiced for mining the deposits
of

Nystagmus is a miner’s disease associated with

A dump truck powered by 350 kW engine is running at a speed of 35 km/h. Considering the
transmission efficiency of the truck as 85%, the rim pull of the truck in kN is

Equipment used in mining of placer deposits is

The roof bolt that follows the principle of point anchorage is

The equipment that is NOT used in hard rock metal mining drivage is

As per the Indian Electricity Rules 1956, the maximum permissible length of a flexible cable used
with an electric rope shovel in m is

In a surface mine, sound pressure level at a location generated by operation of a dozer and a drill
respectively are 80 dBA and 60 dBA, when operated independently. The sound pressure generated
by the dozer compared to the drill is higher by a factor of

If Poisson’s ratio of a rock sample is 0.25, then the relationship among the modulus of elasticity
(E), modulus of rigidity (G) and bulk modulus (K) is

The three axes comprising the numerical codification of resources, as per the UNFC, are

IRR of a project is the discount rate at which

Identify the WRONG statement. The ‘temperature inversion’ of the atmosphere in surface mines aggravates the problem of

0 Identify the WRONG statement.

Pit bottom air lock

Underground coal mines are in principle ventilated by exhausting system, so that

Jack hammer does NOT contain

In metalliferous mines, the sublevel interval does NOT depend on

Which one of the following ropes CANNOT be an effective cable bolt?

The support system followed along the goaf edge in a depillaring panel is

In a 4.2 m wide and 3.0 m high gallery in a coal seam, twelve shot holes are blasted per round. The holes are charged with 2 explosive cartridges of 435 g each. If the powder factor of the blast is 2.2 tonne/kg and specific gravity of coal is 1.4, the pull per round of blast in m is

In self-contained chemical-oxygen self-rescuer, oxygen is produced by

In a fully mechanised bord and pillar mining system, winning of coal and its transportation from the face is commonly carried out with the combination of

Low shock and high gas pressure explosive is generally used for blasting of

Dilatancy of rock is associated with

In a BOD test, 5 ml of wastewater is diluted with pure water to fill a 300 ml BOD bottle. The initial and final dissolved oxygen contents of the mix are 9.0 mg/l and 7.0 mg/l respectively. The BOD of the wastewater, in mg/l, is

The primary purpose of cut holes for blasting in an underground drivage is to

The excess pore pressure in backfill material in a cut-and-fill stope leads to

In a drum hoisting system through a vertical shaft, overwinding is prevented by

The angle in degrees at which a ridge line intersects contours 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

Out of the support categories given for an underground coal mine, identify the ‘active support’

A panel in coal mine produces 400 tonne per day. The number of persons employed in each
of the three shifts is 110, 130 and 120. As per CMR, the minimum quantity of air that
needs to be circulated at the last ventilation connection of the panel in m3
/min is

The significance of ‘potentially explosive mixture’ in Coward flammability diagram is -

The equipment NOT related to extraction of coal from longwall face operation is

Ward-Leonard system is provided in the winding system in order to restrict

The property that CANNOT be determined from uniaxial compressive strength test of a
rock sample fitted with strain gauges is

Exposure of weak roof in junctions of a development district in a coal mine can be
decreased by

Tri-cone drill bit is a type of

A six sided unbiased die with four green faces and two red faces is rolled seven times.
Which of the following combinations is the most likely outcome of the experiment?

In a party, 60% of the invited guests are male and 40% are female. If 80% of the invited
guests attended the party and if all the invited female guests attended, what would be the
ratio of males to females among the attendees in the party?

In appreciation of the social improvements completed in a town, a wealthy philanthropist
decided to gift Rs 750 to each male senior citizen in the town and Rs 1000 to each female
senior citizen. Altogether, there were 300 senior citizens eligible for this gift. However,
only 8/9th of the eligible men and 2/3rd of the eligible women claimed the gift. How much
money (in Rupees) did the philanthropist give away in total?

What is the missing number in the following sequence?
2, 12, 60, 240, 720, 1440, _____, 0

What would be the smallest natural number which when divided either by 20 or by 42 or
by 76 leaves a remainder of 7 in each case?

“A _________ investigation can sometimes yield new facts, but typically organized ones
are more successful.”
The word that best fills the blank in the above sentence is

“From where are they bringing their books? ________ bringing _______ books from
_____.”
The words that best fill the blanks in the above sentence are

 All professors are researchers 

Some scientists are professors 

Which of the given conclusions is logically valid and is inferred from the above arguments:

 In a factory, two machines M1 and M2 manufacture 60% and 40% of the autocomponents respectively. Out of the total production, 2% of M1 and 3% of M2 are found to be defective. If a randomly drawn autocomponent from the combined lot is found defective, what is the probability that it was manufactured by M2?

Velocity of an object fired directly in upward direction is given by V = 80 - 32 t, where t (time) is in seconds. When will the velocity be between 32 m/sec and 64 m/sec?

Select the pair that best expresses a relationship similar to that expressed in the pair: 

water: pipe::