Mechanical Engineering Gate Yearwise
Mechanical Engineering Gate 2015 Set-1 Questions with Answer
Ques 40 GATE 2015 SET-1
In a linear arc welding process, the heat input per unit length is inversely proportional to
Ques 41 GATE 2015 SET-1
The function of interpolator in a CNC machine controller is to
Ques 42 GATE 2015 SET-1
A DC welding power source has a linear voltage-current (V-I) characteristic with open circuit voltage of 80 V and a short circuit current of 300 A. For maximum arc power, the current (in Amperes) should be set as ________.
Ques 43 GATE 2015 SET-1
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 ________.
Ques 44 GATE 2015 SET-1
The solidification time of a casting is proportional to (V/A)2, where V is the volume of the casting and A is the total casting surface area losing heat. Two cubes of same material and size are cast using sand casting process. The top face of one of the cubes is completely insulated. The ratio of the solidification time for the cube with top face insulated to that of the other cube is
Ques 45 GATE 2015 SET-1
In a slab rolling operation, the maximum thickness reduction (Δhmax) is given by Δhmax = μ2R, where R is the radius of the roll and μ is the coefficient of friction between the roll and the sheet. If μ = 0.1, the maximum angle subtended by the deformation zone at the centre of the roll (bite angle in degrees) is ________.
Ques 46 GATE 2015 SET-1
Which one of the following types of stress-strain relationship best describes the behaviour of brittle materials, such as ceramics and thermosetting plastics, (σ = stress and ε = strain)?
Ques 47 GATE 2015 SET-1
Holes of diameter 25.0+0.040+0.020 mm are assembled interchangeably with the pins of diameter 25.0+0.005-0.008 mm. The minimum clearance in the assembly will be
Ques 48 GATE 2015 SET-1
In the assembly shown below, the part dimensions are: L1 = 22.0±0.01 mm, L2 = L3 = 10.0±0.005 mm. Assuming the normal distribution of part dimensions, the dimension L4 in mm for assembly condition would be:
Ques 49 GATE 2015 SET-1
Consider a stepped shaft subjected to a twisting moment applied at B as shown in the figure. Assume shear modulus, G = 77 GPa. The angle of twist at C (in degrees) is ________.
Ques 50 GATE 2015 SET-1
Two identical trusses support a load of 100 N as shown in the figure. The length of each truss is 1.0 m; cross-sectional area is 200 mm2; Young's modulus E = 200 GPa. The force in the truss AB (in N) is ________.
Ques 51 GATE 2015 SET-1
Consider a steel (Young's modulus E = 200 GPa) column hinged on both sides. Its height is 1.0 m and cross-section is 10 mm x 20 mm. The lowest Euler critical buckling load (in N) is ________.
Ques 52 GATE 2015 SET-1
A cantilever beam with flexural rigidity of 200 N.m2 is loaded as shown in the figure. The deflection (in mm) at the tip of the beam is ________.
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