Mechanical Gate Subject

Aptitude and Reasoning Engineering Mathematics Engineering Mechanics Manufacturing Thermodynamics Industrial Engineering Material Science Vibrations Machine Theory Heat Transfer Strength of Material

Manufacturing Mechanical previous year questions with answer

1 2 3 4 5 6 7 8 9 10

Ques 21 Gate 2021 Set-2

In a CNC machine tool, the function of an interpolator is to generate

signal for the lubrication pump during machining

error signal for tool radius compensation during machining

NC code from the part drawing during post processing

reference signal prescribing the shape of the part to be machined

Ques 22 Gate 2021 Set-2

The machining process that involves ablation is

Abrasive Jet Machining

Chemical Machining

Electrochemical Machining

Laser Beam Machining

Ques 23 Gate 2021 Set-2

The allowance provided in between a hole and a shaft is calculated from the difference between

lower limit of the shaft and the upper limit of the hole

upper limit of the shaft and the upper limit of the hole

upper limit of the shaft and the lower limit of the hole

lower limit of the shaft and the lower limit of the hole

Ques 24 Gate 2020 Set-2

The process, that uses a tapered horn to amplify and focus the mechanical energy for machining of glass, is

electrical discharge machining

abrasive jet machining

ultrasonic machining

electrochemical machining

Ques 25 Gate 2020 Set-2

Two plates, each of 6 mm thickness, are to be butt-welded. Consider the following processes and select the correct sequence in increasing order of size of the heat affected zone
1. Arc welding
2. MIG welding
3. Laser beam welding
4. Submerged arc welding

3-2-4-1

1-4-3-2

1-2-3-4

4-3-2-1

Ques 26 Gate 2020 Set-2

A bolt head has to be made at the end of a rod of diameter d = 12 mm by localized forging (upsetting) operation. The length of the unsupported portion of the rod is 40 mm. To avoid buckling of the rod, a closed forging operation has to be performed with a maximum die diameter of ________ mm

18-19.5 is the correct answer.

Ques 27 Gate 2019 Set-1

In a casting process, a vertical channel through which molten metal flows downward , from pouring basin to runner for reaching the mould cavity is called

sprue

riser

pinhole

blister

Ques 28 GATE 2017 SET-2

Which one of the following statements is TRUE for the ultrasonic machining (USM) process?

In USM, the tool vibrates at subsonic frequency.

USM does not employ magnetostrictive transducer.

USM is an excellent process for machining ductile materials.

USM often uses a slurry comprising abrasive-particles and water.

Ques 29 GATE 2017 SET-2

It is desired to make a product having T-shaped cross-section from a rectangular aluminium block. Which one of the following processes is expected to provide the highest strength of the product?

Welding

Casting

Metal forming

Machining

Ques 30 GATE 2017 SET-2

A rod of length 20 mm is stretched to make a rod of length 40 mm. Subsequently, it is compressed to make a rod of final length 10 mm. Consider the longitudinal tensile strain as positive and compressive strain as negative. The total true longitudinal strain in the rod is

-0.5

-0.69

-0.75

-1.0