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GATE ME 2022: Manufacturing Quiz 1 (App update required to attempt this test)

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Question 1

A solid sphere of diameter equal to the side of a cube, made up of aluminium alloy. The ratio of their solidification time will be ________.

Question 2

In distributed NC machines, the satellite computers are used to _______.

Question 3

A mild steel plate 400 mm × 800 mm × 30 mm is to be shaped along its wider face. The ratio of return time to cutting time is 2 : 3 and the feed per cycle is 2 mm. Tool approach and over-travel respectively are 50 mm each, while along width it is 5 mm on both sides, and cutting speed of tool is 24 m/min. The machining time (in minutes) required for machining the given plate with HSS tool will be ___________.

Question 4

A blank of 400 mm wide and 25 mm thick is fed through a rolling mill with 2 powered rolls each of radius 250 mm. The workpiece thickness is to be reduced to 22 mm in one pass. The work material has average flow stress as 175 MPa. The torque required to drive each roll is (kNm)

Question 5

Find the feed rate in ECM process various parameters with iron as workpiece are:

Gap between tool and work piece = l = 0.3 mm–0.03 cm

Supply voltage, V = 12V

Specific resistance, ρs = 4 Ω cm

Cross-section area, A = 10cm2

Density, ρ = 7860 kg/m3

The feed rate is (in cm/sec)

Question 6Multiple Correct Options

In linear gas tungsten arc welding of plates the peak temperature T (in K) is given by: , where q is heat input per unit length (in J/m) of weld, α is thermal diffusivity (in m2/s). of plate material and C1 is a constant independent of process parameters & materials types.

Given

V = 15V, I = 200, V = 5mm/s and K = 150 W/m-K

and C = 950 J/kg-k

The heat transfer efficiency is 85% and temp measured is 1500 K. If current is increased by 30% and voltage is reduced by 20% without changing other parameters. Then, choose the correct ones ___________.

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May 4ESE & GATE ME