Mechanical Engineering Gate Yearwise
Mechanical Engineering Gate 2013 Set-3 Questions with Answer
Ques 40 GATE 2013 SET-3
A steel bar 200 mm in diameter is turned at a feed of 0.25 mm/rev with a depth of cut of 4 mm. The rotational speed of the workpiece is 160 rpm. The material removal rate in mm3/s is
Ques 41 GATE 2013 SET-3
Two cutting tools are being compared for a machining operation. The tool life equations are:
Carbide tool: VT1.6 = 3000
HSS tool: VT0.6 = 200
where V is the cutting speed in m/min and T is the tool life in min. The carbide tool will provide higher tool life if the cutting speed in m/min exceeds
Ques 42 GATE 2013 SET-3
During the electrochemical machining (ECM) of iron (atomic weight = 56, valency = 2) at current of 1000 A with 90% current efficiency, the material removal rate was observed to be 0.26 gm/s. If Titanium (atomic weight = 48, valency = 3) is machined by the ECM process at the current of 2000 A with 90% current efficiency, the expected material removal rate in gm/s will be
Ques 43 GATE 2013 SET-3
In orthogonal turning of a bar of 100 mm diameter with a feed of 0.25 mm/rev, depth of cut of 4 mm and cutting velocity of 90 m/min, it is observed that the main (tangential) cutting force is perpendicular to the friction force acting at the chip-tool interface. The main (tangential) cutting force is 1500 N.
The orthogonal rake angle of the cutting tool in degree is
Ques 44 GATE 2013 SET-3
In orthogonal turning of a bar of 100 mm diameter with a feed of 0.25 mm/rev, depth of cut of 4 mm and cutting velocity of 90 m/min, it is observed that the main (tangential) cutting force is perpendicular to the friction force acting at the chip-tool interface. The main (tangential) cutting force is 1500 N.
The normal force acting at the chip-tool interface in N is
Ques 45 GATE 2013 SET-3
Match the CORRECT pairs.
| Processes | Characteristics / Applications |
| P. Friction Welding | 1. Non-consumable electrode |
| Q. Gas Metal Arc Welding | 2. Joining of thick plates |
| R. Tungsten Inert Gas Welding | 3. Consumable electrode wire |
| S. Electroslag Welding | 4. Joining of cylindrical dissimilar materials |
Ques 46 GATE 2013 SET-3
In a rolling process, the state of stress of the material undergoing deformation is
Ques 47 GATE 2013 SET-3
For a ductile material, toughness is a measure of
Ques 48 GATE 2013 SET-3
Cylindrical pins of 25+0.020+0.010 mm diameter are electroplated in a shop. Thickness of the plating is 30±2.0 micron. Neglecting gage tolerances, the size of the GO gage in mm to inspect the plated components is
Ques 49 GATE 2013 SET-3
A metric thread of pitch 2 mm and thread angle 60° is inspected for its pitch diameter using 3-wire method. The diameter of the best size wire in mm is
Ques 50 GATE 2013 SET-3
A linear programming problem is shown below.
Maximize 3x + 7y
Subject to
3x + 7y ≤ 10
4x + 6y ≤ 8
x, y ≥ 0
It has
Ques 51 GATE 2013 SET-3
A long thin walled cylindrical shell, closed at both the ends, is subjected to an internal pressure. The ratio of the hoop stress (circumferential stress) to longitudinal stress developed in the shell is
Ques 52 GATE 2013 SET-3
A simply supported beam of length L is subjected to a varying distributed load sin(3πx/L) Nm-1, where the distance x is measured from the left support. The magnitude of the vertical reaction force in N at the left support is
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