Mechanical Engineering Gate 2015 Set-2 Questions with Answer

Ques 40 GATE 2015 SET-2

A cube and a sphere made of cast iron (each of volume 1000 cm³) were cast under identical conditions. The time taken for solidifying the cube was 4 s. The solidification time (in s) for the sphere is ________.

Ques 41 GATE 2015 SET-2

In a two-stage wire drawing operation, the fractional reduction (ratio of change in cross-sectional area to initial cross-sectional area) in the first stage is 0.4. The fractional reduction in the second stage is 0.3. The overall fractional reduction is

Ques 42 GATE 2015 SET-2

The flow stress (in MPa) of a material is given by σ = 500ε^0.1, where ε is true strain. The Young's modulus of elasticity of the material is 200 GPa. A block of thickness 100 mm made of this material is compressed to 95 mm thickness and then the load is removed. The final dimension of the block (in mm) is ________.

Ques 43 GATE 2015 SET-2

During a TIG welding process, the arc current and arc voltage were 50 A and 60 V, respectively, when the welding speed was 150 mm/min. In another process, the TIG welding is carried out at a welding speed of 120 mm/min at the same arc voltage and heat input to the material so that weld quality remains the same. The welding current (in A) for this process is

Ques 44 GATE 2015 SET-2

During a TIG welding process, the arc current and arc voltage were 50 A and 60 V, respectively, when the welding speed was 150 mm/min. In another process, the TIG welding is carried out at a welding speed of 120 mm/min at the same arc voltage and heat input to the material so that weld quality remains the same. The welding current (in A) for this process is

Ques 45 GATE 2015 SET-2

A single point cutting tool with 0° rake angle is used in an orthogonal machining process. At a cutting speed of 180 m/min, the thrust force is 490 N. If the coefficient of friction between the tool and the chip is 0.7, then the power consumption (in kW) for the machining operation is ________.

Ques 46 GATE 2015 SET-2

A resistance-capacitance relaxation circuit is used in an electrical discharge machining process. The discharge voltage is 100 V. At a spark cycle time of 25 μs, the average power input required is 1 kW. The capacitance (in μF) in the circuit is

Ques 47 GATE 2015 SET-2

The atomic packing factor for a material with body centered cubic structure is ________.

Ques 48 GATE 2015 SET-2

Which one of the following statements is TRUE?

Ques 49 GATE 2015 SET-2

A cantilever beam OP is connected to another beam PQ with a pin joint as shown in the figure. A load of 10 kN is applied at the mid-point of PQ. The magnitude of bending moment (in kN-m) at fixed end O is

Ques 50 GATE 2015 SET-2

A cantilever beam with square cross-section of 6 mm side is subjected to a load of 2 kN normal to the top surface as shown in the figure. The Young's modulus of elasticity of the material of the beam is 210 GPa. The magnitude of slope (in radian) at Q (20 mm from the fixed end) is ________.

Ques 51 GATE 2015 SET-2

In a plane stress condition, the components of stress at a point are σ_x = 20 MPa, σ_y = 80 MPa and τ_xy = 40 MPa. The maximum shear stress (in MPa) at the point is

Ques 52 GATE 2015 SET-2

A rod is subjected to a uni-axial load within linear elastic limit. When the change in the stress is 200 MPa, the change in the strain is 0.001. If the Poisson's ratio of the rod is 0.3, the modulus of rigidity (in GPa) is ________.