MANUFACTURING AND PRODUCTION TECHNOLOGY QUIZ

In which of the following machine, the work is usually rotated while the drill is fed into work?

Sensitive drilling machine

Radial drilling machine

Deep hole drilling machine

Gang drilling machine

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Which of the following statement is correct regarding grinding of high carbon steel?

The grinding wheel has to be of open structure.

Grinding at high speed results in the reduction of chip thickness and cutting forces per grit.

All of these

Aluminium oxide wheels are employed.

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Two 1 mm thick steel sheets are to be spot welded at a current of 5000 A. Assuming effective resistance to be 200 μm and current flow time of 0.2 second, heat generated during the process will be

5 Joule

1000 Joule

1 Joule

0.2 Joule

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In centreless grinding, work place centre will be

At the intersection of the line joining the wheel centres with the work place plane

Below the line joining the two wheel centres

On the line joining the two wheel centres

Above the line joining the two wheel centres

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Which of the following process is used for preparing parts having large curved surfaces and thin sections?

Hot machining

ECM process

Chemical milling

Ultrasonic machining

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Fixtures are used

For holding the work in milling, grinding, planing or turning operations

For holding and guiding the tool in drilling, reaming or tapping operations

To check the accuracy of workpiece

None of these

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The chamfering is an essential operation after

Rough turning

Boring

Knurling

Thread cutting

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A solid cylinder of diameter 100 mm and height 50 mm is forged between two frictionless flat dies to a height of 25 mm. The percentage change in diameter is

2.07

20.7

41.4

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In a gating system, the ratio 1: 2: 4 represents

Pouring basin area: ingate area: runner area

Runner area: ingate area: casting area

Sprue base area: ingate area: casting area

Sprue base area: runner area: ingate area

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The saw milling is an operation of

Reproduction of an outline of a template on a workpiece

Machining several surfaces of a workpiece simultaneously

Producing grooves around the periphery of a cylindrical or conical workpiece

Producing narrow slots or grooves on a workpiece

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