GATE MN branch:mn PYQs & Answers — Page 7

Questions 61–70 of 650. Imported answers require independent review unless marked reviewed.

A bord and pillar panel has 24 developed pillars of size 40 m × 40 m (centre to centre) under extraction. The following information is given:

Gallery width = 4 m Extraction height = 3 m Extraction ratio during depillaring = 80% Specific gravity of coal = 1.4 Incubation period = 6 months Average working days per month = 25

In order to extract the panel within the incubation period, the minimum rate of production, in tonne per day, is ______________. (rounded off to one decimal place)

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Following observations were taken using a Tacheometer with staff held vertical. The additive and multiplying constants of the instrument are 0 and 100, respectively. The reduced level (RL) of the staff station R, in m, is _____________. (rounded off to two decimal places)

Instrument station P; staff stations Q and R. Staff readings at Q: 1.4, 2.7, 3.9; vertical angle: 7°; at R: 2.1, 2.8, 3.6; vertical angle: 5°. RL of Q = 102 m.

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A truss PQR carries vertical load of 10 kN at Q as shown. The force in member PR, in kN, is ________________. (rounded off to two decimal places)

Diagram for Mining Engineering question 63

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Two blocks P and Q weighing 100 kN and 200 kN, respectively, are connected by a string passing through a massless and frictionless pulley as shown. The friction coefficient between blocks P and Q is 0.4, and that between block Q and surface is 0.3. The minimum force, F, in kN, required to pull the block Q, is ______________. (answer in integer)

Diagram for Mining Engineering question 64

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In a uniaxial compressive strength test, a 120 Ω strain gauge of gauge factor 2.0 is pasted on the rock sample as shown. At the end of the test, the change in resistance of the strain gauge is 0.5 Ω. The longitudinal deformation of the sample, in mm, is ________________. (rounded off to two decimal places)

Diagram for Mining Engineering question 65

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Even though I had planned to go skiing with my friends, I had to _________ at the last moment because of an injury.

Select the most appropriate option to complete the above sentence.

Your answerChoose one option.

back up

back of

back on

back out

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The President, along with the Council of Ministers, __________ to visit India next week.

Select the most appropriate option to complete the above sentence.

Your answerChoose one option.

wish

wishes

will wish

is wishing

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An electricity utility company charges ₹ 7 per kWh (kilo watt-hour). If a 40-watt desk light is left on for 10 hours each night for 180 days, what would be the cost of energy consumption? If the desk light is left on for 2 more hours each night for the 180 days, what would be the percentage-increase in the cost of energy consumption?

Your answerChoose one option.

₹ 604.8; 10%

₹ 504; 20%

₹ 604.8; 12%

₹ 720; 15%

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In the context of the given figure, which one of the following options correctly represents the entries in the blocks labeled (i), (ii), (iii), and (iv), respectively?

Diagram for Mining Engineering question 4

Your answerChoose one option.

Q, M, 12, and 8

K, L, 10 and 14

I, J, 10, and 8

L, K, 12 and 8

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A bag contains Violet (V), Yellow (Y), Red (R), and Green (G) balls. On counting them, the following results are obtained: (i) The sum of Yellow balls and twice the number of Violet balls is 50. (ii) The sum of Violet and Green balls is 50. (iii) The sum of Yellow and Red balls is 50. (iv) The sum of Violet and twice the number of Red balls is 50. Which one of the following Pie charts correctly represents the balls in the bag?

Your answerChoose one option.