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GATE 2020 Manufacturing Rapid Mini Mock (App update required to attempt this test)

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Question 1

List 1 shows the accessories employed in Lathe machine and List 2 shows their use. Match List 1 with List 2

List 1:

1) Collets

2) Face plate

3) Dog clutch

4) Mandrel

List 2:

P) holding thin and hollow workpiece

Q) drive workpiece when it is held between two centres

R) holding irregular shapes

S) holding semi finished and finished parts

Question 2

Choose the correct order of tool materials arranged, according to the decreasing order of their hot hardness.

Question 3

The fit on a hole shaft basic system is specified as H7-q5 then this fit belongs to

Question 4

Match the following group A with group B

Group A

A. Program end

B. Tool change

C. Coolant on

D. Linear feed move

E. Dwell

GROUP B

1. M08

2. M02

3. G04

4. G01

5. M06

Question 5

A Robot arm PQ with end coordinates P (0,0) and Q (2,5) rotates counter-clockwise about P in the XY plane by 90 °. The new coordinate pair of the end point Q is

Question 6

A round billet is extruded at a temperature of 675 °C. The billet diameter is 125 mm and diameter after extrusion is 50 mm. The extrusion force required if the extrusion constant is 56 N/mm2, is _______ MN.

Question 7

A rectangular plate of dimensions 500×250×45 mm is being produced using casting. The solidification time of the rectangular plate casting is 8 minutes. Calculate the diameter of a cylindrical riser (in mm) having d/l ratio as 1 that will take 25% longer to solidify.

Question 8

In a metal cutting operation carried out with zero rake angle, the shear angle was calculated to be . The shear strain measured during the cutting process is __________

Question 9

The maximum interference in mm after assembly between a bush of size Description: E:\Gate\SSC JE Mechanical Part 1\Made Easy Questions\09_Manufacturing-Engg_BLok1_files\image007.png and a shaft of size Description: E:\Gate\SSC JE Mechanical Part 1\Made Easy Questions\09_Manufacturing-Engg_BLok1_files\image008.png is

Question 10

In rolling operation, diameter of roll is 200 mm, thickness of strip is 12 mm. Considering 20 % reduction in the thickness, the roll strip contact length?

Question 11

The volume of a weld nugget produced by spot welding process is 80 , welding is performed using 10000 A current. Energy required for melting of unit volume of metal is 10 J/mm3. Assume that heat lost to the surrounding base metal is 500 J and contact resistance is 0.0002 ohms. If all other losses are negligible. The thermal efficiency of the spot welding is

Question 12

ECM is performed on a material having following alloyingcombination

Take I = 500 amp and density of alloy = 8.28 g/cm3

The material removal rate(upto two places of decimal) in cm3/hour of the alloy will be

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Mar 8ESE & GATE ME