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4

High speed steel drills can be operated at about _________ the speed of high carbon steel drills.

A. One-half

B. One-fourth

C. Double

D. Four times

Correct Answer :

C. Double


Related Questions

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4

In a centre lathe, the cutting tool is fed in _________ with reference to the lathe axis.

A. Cross direction only

B. Longitudinal direction only

C. Both cross and longitudinal direction

D. Any direction

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4

The enlarging of an existing circular hole with a rotating single point tool is called

A. Boring

B. Drilling

C. Reaming

D. Internal turning

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4

In American Standard Association (A S A) system, if the tool nomenclature is 8-6-5-5-10-15-2 mm, then the side rake angle will be

A.

B.

C.

D. 10°

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4

Gear finishing operation is called

A. Shaping

B. Milling

C. Hobbing

D. Burnishing

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4

The lathe spindles are usually made hollow and provided with

A. Internal taper

B. External taper

C. Internal and external taper

D. No taper

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4

Which of the following statement is correct in regard to centreless grinding?

A. The workpiece is supported throughout its entire length as grinding takes place.

B. It is a continuous process and adopted for production work.

C. It requires no holding device for the work.

D. All of the above

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4

The in-feed grinding is used to

A. Produce tapers

B. Grind shoulders and formed surfaces

C. Grind long, slender shafts or bars

D. All of these

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4

A drill considered as a cutting tool having zero rake, is known as a

A. Flat drill

B. Straight fluted drill

C. Parallel shank twist drill

D. Tapered shank twist drill

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4

A coarse grained grinding wheel is used to grind

A. Hard and brittle materials

B. Soft and ductile materials

C. Hard and ductile materials

D. Soft and brittle materials

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4

The taper on the lathe spindle is

A. 1 in 10

B. 1 in 15

C. 1 in 20

D. 1 in 30

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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

The size of abrasive grain required in a grinding wheel depends upon the

A. Amount of material to be removed

B. Hardness of material being ground

C. Finish desired

D. All of these

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4

While cutting helical gears on a non-differential gear hobber, the feed change gear ratio is

A. Independent of index change gear ratio

B. Dependent on speed change gear ratio

C. Interrelated to index change gear ratio

D. Independent of speed and index change gear ratio

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4

The process of changing the shape of grinding wheel as it becomes worn due to breaking away of the abrasive and bond, is called

A. Truing

B. Dressing

C. Facing

D. Clearing

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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

Segmental chips are formed during machining

A. Mild steel

B. Cast iron

C. High speed steel

D. High carbon steel

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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

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

A ring gauge is used to measure

A. Outside diameter but not roundness

B. Roundness but not outside diameter

C. Both outside diameter and roundness

D. Only external threads

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4

What is the welding defect caused due to improper control and poor removal of slog between passes called?

A. Mismatch

B. Under fill

C. Crack

D. Porosity

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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 tap used to cut threads in a blind hole is

A. Taper tap

B. Second tap

C. Bottoming tap

D. Any one of these

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4

It is required to cut screw threads of 2 mm pitch on a lathe. The lead screw has a pitch of 6 mm. If the spindle speed is 60 r.p.m., then the speed of lead screw will be

A. 10 r.p.m.

B. 20 r.p.m.

C. 120 r.p.m.

D. 180 r.p.m.

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4

The rear teeth of a broach

A. Perform burnishing operation

B. Remove minimum metal

C. Remove maximum metal

D. Remove no metal

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4

The lead screw of a lathe has _________ threads.

A. Single start

B. Double start

C. Multi-start

D. Any one of these

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4

The lathe spindles at the nose end have

A. Internal screw threads

B. External screw threads

C. No threads

D. Tapered threads

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4

In abrasive jet machining, as the distance between the nozzle tip and the work surface increases, the material removal rate

A. Increases continuously

B. Decreases continuously

C. Decreases, becomes stable and then increases.

D. Increases, becomes stable and then decreases.

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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

If a gas metal arc process uses a low arc voltage and the arc is continuously interrupted as the molten electrode metal fills up the arc gap is known as

A. ARC

B. Short ARC

C. ARC length

D. ARC blow

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4

Side rake angle of a single point cutting tool is the angle

A. By which the face of the tool is inclined towards back

B. By which the face of the tool is inclined sideways

C. Between the surface of the flank immediately below the point and a plane at right angles to the centre line of the point of the tool

D. Between the surface of the flank immediately below the point and a line drawn from the point perpendicular to the base