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4

The hole to be drilled for tapping is _________ the outside diameter of the thread on the tap.

A. Equal to

B. Smaller than

C. Greater than

D. None of these

Correct Answer :

B. Smaller than


Related Questions

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4

In centre less grinders, the maximum angular adjustment of the regulating wheel is

A.

B. 10°

C. 15°

D. 20°

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4

In an orthogonal cutting, the depth of cut is halved and the feed rate is double. If the chip thickness ratio is unaffected with the changed cutting conditions, the actual chip thickness will be

A. Doubled

B. Halved

C. Quadrupled

D. Unchanged

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4

What is the type of welding defect caused due to shrinkage during solidification and by weld stresses called?

A. Incomplete fusion

B. Lamellar tearing

C. Mismatch

D. Shrinkage void

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4

The tool material, for faster machining, should have

A. Wear resistance

B. Red hardness

C. Toughness

D. All of these

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4

The type of reamer used for reaming operation in a blind hole, is

A. Straight fluted reamer

B. Left hand spiral fluted reamer

C. Right hand spiral fluted reamer

D. Any one of these

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4

The average cutting speed for turning mild steel with a high speed steel tool is

A. 15 to 19 m/min

B. 25 to 31 m/min

C. 60 to 90 m/min

D. 90 to 120 m/min

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4

What is the method of brazing used to join relatively small assemblies made from materials that either do not oxidize at the brazing temperature or can be protected from oxidation with a flux?

A. Torch brazing

B. Dip brazing

C. Resistance brazing

D. Furnace brazing

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4

Any number of equal divisions can be obtained on milling machine by

A. Direct indexing

B. Simple indexing

C. Compound indexing

D. Differential indexing

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4

In a plain milling machine, the table can be moved

A. Longitudinally

B. Crosswise

C. Vertically

D. All of these

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4

The relation between tool life (T) and cutting speed (V) is VTn = Constant. In this relation, the value of n depends upon

A. Work material

B. Tool material

C. Working conditions

D. Type of chip produced

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4

In which of the following machine, the work rotates and the tool is stationary?

A. Vertical boring machine

B. Horizontal boring machine

C. Precision boring machine

D. Jig boring machine

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4

A diamond locating pin is used in jigs and fixtures because

A. Diamond is very hard and wear resistant

B. It occupies very little space

C. It helps in assembly with tolerance on centre distance

D. It has a long life

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4

A 15 mm drilling machine means that it can drill a hole

A. Of maximum diameter 15 mm

B. In 15 mm thick plates

C. Having cross-sectional area of 15 mm²

D. None of these

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4

As tool and work are not in contact in EDM process

A. No relative motion occurs between them

B. No wear of tool occurs

C. No power is consumed during metal cutting

D. No force between tool and work occurs

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4

The addition of lead, sulphur and phosphorus to low carbon steels, help to

A. Reduce built up edge

B. Break up chips

C. Improve machinability

D. All of these

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4

High speed steel tools retain their hardness upto a temperature of

A. 250°C

B. 350°C

C. 500°C

D. 900°C

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4

A tool used to withdraw a drill from the sleeve is called

A. Drill remover

B. Drill puller

C. Drift

D. Drill drawer

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4

The grinding operation is a

A. Shaping operation

B. Forming operation

C. Surface finishing operation

D. Dressing operation

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4

The lip clearance angle is the angle formed by the

A. Leading edge of the land with a plane having the axis of the drill

B. Flank and a plane at right angles to the drill axis

C. Chisel edge and the lip as viewed from the end of a drill

D. None of the above

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4

The actual feed in centerless grinders is given by (where d = Dia. of regulating wheel, n = Revolutions per minute, and α = Angle of inclination of wheel)

A. πd

B. πdn

C. πdn sinα

D. πdn cosα

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4

If the tearing efficiency of a riveted joint is 50%, then ratio of rivet hole diameter to the pitch of rivets is

A. 0.20

B. 0.30

C. 0.50

D. 0.60

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4

A better machinable metal is one which gives

A. Lower chip-tool contact area and larger shear angle

B. Higher chip-tool contact area and smaller shear angle

C. Lower chip-tool contact area and smaller shear angle

D. Higher chip-tool contact area and larger shear angle

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4

Glazing in grinding wheels takes place when the

A. Wheel is too hard or wheel revolves at a very high speed

B. Wheel is too soft or wheel revolves at a very slow speed

C. Wheel is too hard and wheel revolves at very slow speed

D. Wheel is too soft and wheel revolves at a very high speed

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4

In centreless grinders, the regulating wheel is inclined at

A. 0° to 8°

B. 9° to 15°

C. 16° to 20°

D. 21° to 25°

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4

For machining a cast iron workpiece by a high speed steel tool, the average cutting speed is

A. 10 m/min

B. 15 m/min

C. 22 m/min

D. 30 m/min

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4

In which type of welding a gas shield, a consumable electrode is used and the welding can be done in all positions.

A. ARC welding

B. Submerged ARC welding

C. TIG welding

D. MIG welding

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4

Larger than 15° side cutting edge angle

A. Increases tool life

B. Decreases tool life

C. Produces chipping and decreases tool life

D. Results in excessive stress concentration and greater heat generation

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4

What is the type of shielding gas for GTAW (Gas Tungsten Arc Welding) used for carbon steels only called?

A. Argon H₂

B. Argon CO₂

C. Argon Helium

D. Helium

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4

During the execution of a CNC part program block NO20 GO2 X45.0 Y25.0 R5.0 ; the type of tool motion will be

A. Circular Interpolation − clockwise

B. Circular Interpolation − counter clockwise

C. Linear Interpolation

D. Rapid feed

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4

The usual value of the helix angle of a drill is

A. 20°

B. 30°

C. 45°

D. 60°