GATE MN format:nat PYQs & Answers — Page 30

Questions 291–300 of 300. Imported answers require independent review unless marked reviewed.

Topic practice 300 questionsPage 30 of 30

To break a volume of 30000 cubic meter of overburden per month in an open cast mine, the number of blast hole drills required for the following data is ________

Spacing and burden of blast holes: 6.0 m x 4.0 m Hours scheduled per shift: 5 Number of shifts per day: 2 Weeks per month: 4 Drilling days per week: 5 Drilling rate: 30.67 m/h

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Ground reaction curve (GRC) of a tunnel roof under hydrostatic stress field is given by

, where

is the required support pressure in MPa and

is radial displacement in m. A uniform support is installed at the boundary of the tunnel providing support reaction (SR) as

, for

m. Considering GRC = SR, the support pressure in MPa is ________

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

The discharge rate of a water pump is 0.25 m³/s. The diameter of the discharge and suction nozzles are 300 and 350 mm respectively. The measured pressure at the discharge end located 0.25 m above the center line of the impeller is 150 kN/m² and the pressure at the suction gage located at the centre line of the impeller is 20 kN/m². Specific weight of water is 9810 N/m³. The total dynamic head for the above installation in m is ________

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

In a mine, 200 and 250 persons are deployed in the Panels A and B (shown in figure) respectively in the largest shift.

Diagram for Mining Engineering question 48

The panels produce 400 and 500 tonne/day respectively. The resistances of panels A and B are 0.3 Ns²m⁻⁸ and 0.4 Ns²m⁻⁸ respectively and the combined resistance of shaft and trunk airways is 0.5 Ns²m⁻⁸. The operating static pressure of the fan in Pa to provide the minimum air quantities in the panels as per CMR 1957 is ________

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

In an auxiliary ventilation system, a fan is installed inside a 100 m long and 600 mm diameter duct to ventilate a blind heading face. The frictional coefficient of the duct is 0.0066 Ns²m⁻⁴ and the static pressure characteristic of the fan is represented by:

where,

is in Pa and Q is in m³/s. The quantity of air delivered by the fan in m³/s is ________

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

A stream flowing at 15 m³/s has a tributary feeding into it with a flow rate of 7 m³/s. The concentrations of chloride at the upstream of the junction and that of the tributary are 30 mg/L, and 50 mg/L respectively. Treating chloride as conservative substance and assuming complete mixing of two streams, the concentration of chloride in mg/L at the downstream is ________

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

A sample of mine water has 100 mg/L of

and 10 mg/L of

. The equivalent weights of

and

are 20 mg/meq and 12.2 mg/meq respectively. The hardness of mine water in unit of mg/L as CaCO₃ is ________

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

A 1.1 m wide belt conveyor carries materials of bulk density 1.35 t/m³ at a speed of 1.75 m/s. The average cross-sectional area of material is equal to

, where w is the width of the belt in m. The carrying capacity of the conveyor in t/h is ________

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

In a book of 600 pages, there are 60 typographical errors. Assuming Poisson distribution for the number of errors per page, the probability of no errors in randomly chosen 4 pages is ________

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

A wheel of radius 0.5 m rotates under a moment of 2000 N-m as shown in the figure. A block brake is used to stop the wheel.

Diagram for Mining Engineering question 55

If the coefficient of static friction between the wheel and the block brake is 0.3, the smallest force of P in N required to stop the wheel is ________

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

GATE MN format:nat PYQs

Question 43

Question 45

Question 47

Question 48

Question 49

Question 50

Question 51

Question 52

Question 53

Question 55