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GATE ME 2021 || Subject Revision Quiz-6 (App update required to attempt this test)

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Question 1

Planar density of (1, 0, 0) planes of FCC structure is _________ %.

Question 2

The process of making hollow castings of non-circular shape and desired thickness by permanent mould without the use of cores is known as ____.

Question 3

The following data relate to an orthogonal turning process: Chip thickness = 0.62 mm Feed = 0.2 mm/rev The chip reduction coefficient is _____.

Question 4

The bite angle when rolling plates 12 mm thick using work rolls 600 mm diameter and reducing the thickness to 6 mm is _____ degrees.

Question 5

A 40 mm diameter rod is to be turned on a lathe at a cutting speed of 30 m/min. The required spindle speed should be approximately:

Question 6

An orthogonal turning operation is carried out under the following conditions: rake angle = 5 ° and Chip thickness ratio is given 0.6. The shear angle (in degrees) in this turning process is_______

Question 7

In Grinding wheel specification: A 76 M 8 S . Where S signifies____?

Question 8

A rectangular hole of size 150mm X 60mm is to be made on a 8 mm thick sheet having ultimate tensile strength and shear strength of 500MPa & 300MPa respectively. The punching force required (in KN) is__________.

Question 9

Tolerance on the dimension ‘X’ in the two component assembly shown below
[All dimension are in mm]

Question 10

The percentage change in the solidification time of a casting of cuboid shape when each dimension is increased to 3 times is __________. (Assume conditions remain same)

Question 11

A 4 mm thick steel sheet of 25 mm width is to bent at an angle of 60

having a bend radius of 5 mm. The bend allowance for this operation will be __________ mm( Given bend constant k= 0.33)

Question 12

In arc welding of a butt joint, the welding speed is to be selected such that highest cooling rate is achieved. Melting efficiency and heat transfer efficiency are 0.5 and 0.7, respectively. The area of the weld cross section is 5 mm² and the unit energy required to melt the metal is 10 J/mm³. If the welding power is 2 kW, the welding speed in mm/s is closest to

Question 13

In Orthogonal turning of medium carbon steel, the specific machining energy is 8.0 J/mm³the cutting velocity, feed and depth of cut are 120 m/min, 0.6 mm/rev and 6 mm respectively. The main cutting force in N is

Question 14

In a tool wear study experiment, it is found that doubling cutting speed reduces the tool life to 1/8^th of the original. The Taylor’s tool life index is

Question 15

The voltage length characteristic of a direct current (dc) arc is given by
V = (20 + 40 L) Watts
Where, L is the length of the arc in cm. The power source characteristic is approximated by a straight line with an open circuit voltage = 80 V and a short circuit current = 1000 amp. The optimum arc length is _________ (in cm).

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Jun 30ESE & GATE ME