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4

A twist drill is specified by its

A. Shank, material and diameter

B. Shank, lip angle and size of flute

C. Material, length of body and helix angle

D. Any one of these

Correct Answer :

A. Shank, material and diameter


Related Questions

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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

For turning small taper on long workpiece, the suitable method is

A. By a form tool

B. By setting over the tail stock

C. By a taper turning attachment

D. By swivelling the compound rest

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4

The chamfering is an operation of

A. Bevelling the extreme end of a workpiece

B. Embossing a diamond shaped pattern on the surface of a workpiece

C. Reducing the diameter of a workpiece over a very narrow surface

D. Enlarging the end of a hole cylindrically

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4

Crater wear is mainly due to the phenomenon known as

A. Adhesion of metals

B. Oxidation of metals

C. Diffusion of metals

D. All of these

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4

Glazing in grinding wheels __________ cutting capacity.

A. Has no effect on

B. Increase

C. Decrease

D. None of these

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4

In a metal arc welding process, a gas metal arc welding with magnetized flux is used and can be done in all the positions i.e. flat position, vertical position or inclined position.

A. Globular transfer

B. Spray transfer

C. GMAW practice

D. Dip transfer

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4

Drilling is an example of

A. Orthogonal cutting

B. Oblique cutting

C. Simple cutting

D. Uniform cutting

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4

Allowance in limits and fits refers to

A. Maximum clearance between shaft and hole

B. Minimum clearance between shaft and hole

C. Difference between maximum and minimum sizes of hole

D. Difference between maximum and minimum sizes of shaft

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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

In oblique cutting of metals, the cutting edge of the tool is

A. Perpendicular to the workpiece

B. Perpendicular to the direction of tool travel

C. Parallel to the direction of tool travel

D. Inclined at an angle less than 90° to the direction of tool travel

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4

The relation between the tool life (T) in minutes and cutting speed (V) in m/min is (where n = An exponent, which depends upon the tool and workpiece, and C = A constant)

A. VnT = C

B. VTn = C

C. Vn/T = C

D. V/Tn = C

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4

It is desired to perform the operations like drilling, reaming, counter-boring etc. on a work piece. Which of the following machine will be used?

A. Sensitive drilling machine

B. Radial drilling machine

C. Gang drilling machine

D. Multiple spindle drilling machine

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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

A jig is defined as a device which

A. Holds and locates a workpiece and guides and controls one or more cutting tools

B. Holds and locates a workpiece during an inspection or for a manufacturing operation

C. Is used to check the accuracy of workpiece

D. All of the above

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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

In drilling operation, the metal is removed by

A. Shearing

B. Extrusion

C. Shearing and extrusion

D. Shearing and compression

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4

Work speed of circular electrode of 220 mm diameter for carrying out seam welding at 4 welds per cm on 1.6 mm thick mild steel tube. Welding cycle consists of 3 cycles on and 2 cycles off Power supply is at 50 Hz. Calculate R.P.M. and energy requirement of the above circular electrodes assuming effective resistance between electrodes as 100 ohm.

A. 2.17 rpm, 600 joules

B. 6.8 rpm, 6 joules

C. 5.03 rpm, 600 joules

D. 22 rpm, 600 joules

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4

The grade of grinding wheel depends upon

A. Hardness of the material being ground

B. Speed of wheel and work

C. Condition of grinding machine

D. All of these

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4

The stroke of a shaping machine is 250 mm. It makes 30 double strokes per minute. The overall average speed of operation is

A. 3.75 m/min

B. 5 m/min

C. 7.5 m/min

D. 15 m/min

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4

The cutting tool in a milling machine is mounted on

A. Spindle

B. Arbor

C. Column

D. Knee

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4

The grinding of long, slender shafts or bars is usually done by

A. In-feed grinding

B. Through feed grinding

C. End-feed grinding

D. Any one of these

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4

The parameter which completely defines the chip formation in a metal cutting process is

A. Shear angle

B. Chip-tool contact length

C. Both (A) and (B)

D. None of these

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4

In order to prevent tool from rubbing the work _________ on tools are provided.

A. Rake angles

B. Relief angles

C. Face angles

D. None of these

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4

In up milling, the thickness of chip is

A. Minimum at the beginning of the cut and maximum at the end of the cut

B. Maximum at the beginning of the cut and minimum at the end of the cut

C. Uniform throughout the cut

D. None of these

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4

In metal machining, the zone where the maximum heat is generated due to the plastic deformation of metal, is called

A. Friction zone

B. Work-tool contact zone

C. Shear zone

D. None of these

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4

Which one of the following is a solid state joining process?

A. Gas tungsten arc welding

B. Resistance spot welding

C. Friction welding

D. Submerged arc welding

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4

The purpose of jigs and fixtures is to

A. Increase machining accuracy

B. Facilitate interchangeability

C. Decrease expenditure on quality control

D. All of these

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4

When the tool moves parallel to the lathe axis, the movement is termed as

A. Cross feed

B. Angular feed

C. Longitudinal feed

D. Any one of these

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4

The type of tool used on milling machine and broaching machine is

A. Single point cutting tool

B. Two point cutting tool

C. Three point cutting tool

D. Multipoint cutting tool

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4

The cutting speed for drilling aluminium, brass and bronze with carbon steel drills is _________ cutting speed for drilling mild steel with high speed steel drills.

A. Equal to

B. Less than

C. More than

D. None of these