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GATE ME 2019 National Champion Quiz: Manufacturing & Engg. Material (App update required to attempt this test)

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Question 1

Which of the following are major factors of arising dislocations ________?

Question 2

The part of a gating system which regulates the rate of pouring of molten metal is _________.

Question 3

In a single point turning operation with cemented carbide tool and steel work piece, it is found that the Taylor’s exponent is 0.25. If the cutting speed is reduced by 50% then the tool life changes by ______ times.

Question 4

The temperature range for soldering process is:

Question 5

In a wire drawing operation, diameter of steel wire is reduced from 10 mm to 8 mm. The ideal force required for drawing (ignore friction) is 8.97 kN. The mean flow stress in MPa is ________.

Question 6

A seamless tube 30 mm diameter is turned on the lathe. The cutting velocity of tool relative to work piece is 10 m/min. Rake angle, α = 35 °, depth of cut, t1 = 0.125 mm, length of chip = 55 mm. The velocity of chip relative to work-piece is

Question 7

Which among the following is NOT the characteristics of non-traditional machine process _________?

Question 8

While removing material from iron surface (atomic weight = 56, valency = 2 and density = 7.8 g/cm3) that is 40 mm × 40 mm in cross-section by electrochemical machining, a metal removal rate of 4 cm3/min is desired. The supply voltage is 12 V DC. The specific resistance of electrolyte is The gap between tool and workpiece is 0.25 mm. The overvoltage (extra - voltage in Volts) required for ion transfer is

Question 9

In a DC arc welding operation, the voltage-arc length characteristic was obtained as where the arc length was varied between 5 mm and 7 mm. Here denotes the arc voltage in Volts. The arc current was varied from 400 A to 500 A. Assuming linear power source characteristic, the open circuit voltage and the short circuit current for the welding operation are

Question 10

Resistance spot welding is performed on two plates of 2 mm thickness with 6 mm diameter electrode, using 15000 A current for time duration of 0.25 seconds. Assuming interface resistance to be 0.0001 ohm, the heat generated to form the weld is ____ W-sec.

Question 11

The tool of an NC machine has to move along a circular arc from (5,5) to (10,10) while performing an operation. The center of the arc is at (10, 5). Which one of the following NC tool path commands performs the above mentioned operation?

Question 12

A shell of 100 mm diameter and 100 mm height with the corner radius of 0.4 mm is to be produced by cup drawing. The required blank diameter is
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May 21ESE & GATE ME