Mechanical Engineering Gate Yearwise
Mechanical Engineering Gate 2022 Set-1 Questions with Answer
Ques 27 GATE 2022 SET-1
Which of the following methods can improve the fatigue strength of a circular mild steel (MS) shaft?
Ques 28 GATE 2022 SET-1
A bracket is attached to a vertical column by means of two identical rivets U and V separated by a distance of 2a = 100 mm. The permissible shear stress of the rivet material is 50 MPa. If a load P = 10 kN is applied at an eccentricity e = 3√7 a, the minimum cross-sectional area of each rivet to avoid failure is?
Ques 29 GATE 2022 SET-1
A square threaded screw is used to lift a load W by applying a force F. Efficiency of the square threaded screw is expressed as?
Ques 30 GATE 2022 SET-1
A CNC worktable is driven in a linear direction by a lead screw connected directly to a stepper motor. The pitch of the lead screw is 5 mm. The stepper motor completes one full revolution upon receiving 600 pulses. If the worktable speed is 5 m/minute and there is no missed pulse, then the pulse rate being received by the stepper motor is?
Ques 31 GATE 2022 SET-1
The type of fit between a mating shaft of diameter 25.0
mm and a hole of diameter 25.015
mm is __________.
Ques 32 GATE 2022 SET-1
Which of the following heat treatment processes is/are used for surface hardening of steels?
Ques 33 GATE 2022 SET-1
Which of the following additive manufacturing technique(s) can use a wire as a feedstock material?
Ques 34 GATE 2022 SET-1
Electrochemical machining operations are performed with tungsten as the tool, and copper and aluminum as two different workpiece materials. Properties of copper and aluminum are given in the table below.
Ques 35 GATE 2022 SET-1
Under orthogonal cutting condition, a turning operation is carried out on a metallic workpiece at a cutting speed of 4 m/s. The orthogonal rake angle of the cutting tool is 5º. The uncut chip thickness and width of cut are 0.2 mm and 3 mm, respectively. In this turning operation, the resulting friction angle and shear angle are 45º and 25º, respectively. If the dynamic yield shear strength of the workpiece material under this cutting condition is 1000 MPa, then the cutting force is ______________ N (round off to one decimal place).
Ques 36 GATE 2022 SET-1
A 1 mm thick cylindrical tube, 100 mm in diameter, is orthogonally turned such that the entire wall thickness of the tube is cut in a single pass. The axial feed of the tool is 1 m/minute and the specific cutting energy (u) of the tube material is 6 J/mm³. The power required to carry out this operation is _________ kW (round off to one decimal place).
Ques 37 GATE 2022 SET-1
A 4 mm thick aluminum sheet of width w = 100 mm is rolled in a two-roll mill of
roll diameter 200 mm each. The workpiece is lubricated with a mineral oil, which
gives a coefficient of friction, µ=0.1. The flow stress (𝜎 ) of the material in MPa
is 𝜎 =207+414 𝜀, where 𝜀 is the true strain. Assuming rolling to be a plane strain
deformation process, the roll separation force (F) for maximum permissible draft
(thickness reduction) is _________ kN (round off to the nearest integer).
Use:
is average flow stress, 𝐿 is roll-workpiece
contact length, and ℎ J is the average sheet thickness.
Ques 38 GATE 2022 SET-1
Two mild steel plates of similar thickness, in butt-joint configuration, are welded by gas tungsten arc welding process using the following welding parameters:
Ques 39 GATE 2022 SET-1
In the Fe-Fe3C phase diagram, the eutectoid composition is 0.8 weight % of carbon at 725 °C. The maximum solubility of carbon in α-ferrite phase is 0.025 weight % of carbon. A steel sample, having no other alloying element except 0.5 weight % of carbon, is slowly cooled from 1000 °C to room temperature. The fraction of pro-eutectoid α-ferrite in the above steel sample at room temperature is
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