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GATE 2019: Manufacturing Rapid Quiz-1 (App update required to attempt this test)

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Question 1

Essential required for the planes to be named as family of planes is

Question 2

Denoting as liquid and as solid in a phase-diagram with the subscripts representing different phases, a eutectoid reaction is described by

Question 3

Following data correspond to an orthogonal turning of a 100 mm diameter rod on a lathe. Rake angle: +15o; Uncut chip thickness: 0.5 mm; nominal chip thickness after the cut: 1.25 mm. The shear angle (in degrees) for this process is _________ (correct to two decimal places).

Question 4

For sand-casting a steel rectangular plate with dimensions a cylindrical riser has to be designed. The height of the riser is equal to its diameter. The total solidification time for the casting is 2 minutes. In Chvorinov’s law for the estimation of the total solidification time, exponent is to be taken as For a solidification time of 3 minutes in the riser, the diameter (in mm) of the riser is __________ (correct to two decimal places).

Question 5

A sprue in a sand mould has a top diameter of 20mm and height of 200mm. The velocity of the molten metal at the entry of the sprue is 0.5m/s. Assume acceleration due to gravity as 9.8 m/s2 and neglect all losses. If the mould is well ventilated, the velocity (upto 3 decimal points accuracy) of the molten metal at the bottom of the sprue is ________ m/s.

Question 6

An orthogonal turning operation is carried out under the following conditions: rake angle = 5 °; spindle rotational speed = 400 rpm: axial feed = 0.4 m/min and radial depth of cut = 5 mm. The chip thickness, tc, is found to be 3 mm. The shear angle (in degrees) in this turning process is_______

Question 7

In a shaping process, the number of double strokes per minutes is 45 and the quick return ratio is 0.8. If the length of the stroke is 300 mm, the average cutting velocity (in m/min) ___________.

Question 8

Through holes of 10 mm diameter are to be drilled in a steel plate of 20 mm thickness. Drill spindle speed is 300 rpm, feed 0.2 mm/rev and drill point angle is 1200. Assuming drill over travel of 2 mm, the time for producing a hole will be

Question 9

In a shear cutting operation, a sheet of 5mm thickness is cut along a length of 200mm. The cutting blade is 400mm long and zero-shear (S=0) is provided on the edge. The ultimate shear strength of the sheet is 100MPa and penetration to thickness ratio is 0.2. Neglect friction.
Description: D:\GradeStack Courses\GATE Tests (Sent by Ravi)\GATE EC-ME-17-Mar\GATE-ME-2010_files\image158.jpg
Assuming force vs displacement curve to be rectangular, the work done (in J) is

Question 10

In a machining experiment, tool life was found to vary with the cutting speed in the following manner:
The exponent (n) and constant (k) of the Taylor’s tool life equation are

Question 11

From the lists given below, choose the most appropriate set of heat treatment process and the corresponding process characteristics ______.

Description: D:\GradeStack Courses\GATE Tests (Sent by Ravi)\GATE ME 18-Mar\GATE-ME-2004_files\image324.png

Question 12

The surface irregularities of electrodes used in an electrochemical machining (ECM) process are 3 μm and 6 μm as shown in the figure. If the work-piece is of pure iron and 12V DC is applied between the electrodes, the largest feed rate is mm/min.

Assume the iron to be dissolved as Fe+2 and the Faraday constant to be 96500 Coulomb.
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