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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

Correct Answer :

B. Straight fluted drill


Related Questions

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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

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

In a plain milling cutter, the portion of the gash adjacent to the cutting edge on which the chip impinges is called

A. Face

B. Fillet

C. Land

D. Lead

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4

A dynamometer is a device used for the measurement of

A. Chip thickness ratio

B. Forces during metal cutting

C. Wear of the cutting tool

D. Deflection of the cutting tool

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4

Twist drills are made of

A. High speed steel

B. Carbon steel

C. Stainless steel

D. Either (A) or (B)

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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

The material which on machining produces chips with built up edge is

A. Brittle material

B. Tough material

C. Hard material

D. Ductile material

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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

Which of the following engineering materials is the most suitable candidate for hot chamber die casting?

A. Low carbon steel

B. Titanium

C. Copper

D. Tin

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4

In order to grind soft material

A. Coarse grained grinding wheel is used

B. Fine grained grinding wheel is used

C. Medium grained grinding wheel is used

D. Any one of these

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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

Small nose radius

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

For softer materials, the point angle of the drill is kept

A. Equal to 118°

B. Less than 118°

C. More than 118°

D. Any one of these

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4

Cutting fluids are used to

A. Cool the tool

B. Improve surface finish

C. Cool the workpiece

D. All of these

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4

Flank wear depends upon the

A. Hardness of the work and tool material at the operating temperature

B. Amount and distribution of hard constituents in the work material

C. Degree of strain hardening in the chip

D. All of these

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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

Which of the following statement is correct about EDM machining?

A. It can machine hardest materials.

B. It produces high degree of surface finish.

C. The tool and work are never in contact with each other.

D. All of these

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4

The factor which affects the tool life is

A. Tool geometry

B. Cutting speed

C. Feed rate

D. All of these

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4

The facing 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. Machining the ends of a workpiece to produce a flat surface square with the axis

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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

Gears can be best produced on mass production by

A. Shaping

B. Casting

C. Forming

D. Hobbing

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4

The cutting force in punching and blanking operations mainly depends on

A. The modulus of elasticity of metal

B. The shear strength of metal

C. The bulk modulus of metal

D. The yield strength of metal

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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

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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

Cast iron during machining produces

A. Continuous chips

B. Discontinuous chips

C. Continuous chips with built-up edge

D. None of these

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4

A mandrel is used to hold

A. An eccentric work

B. A heavy work

C. A thin work

D. None of these

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4

During normalizing process of steel, the specimen is heated

A. Between the upper and lower critical temperature and cooled in still air.

B. Above the upper critical temperature and cooled in furnace.

C. Above the upper critical temperature and cooled in still air.

D. Between the upper and lower critical temperature and cooled in furnace.

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4

While current is shut down in the welding circuit, what kind of voltage exists between the output terminals of the welding machine?

A. GTAW

B. Open air cut voltage

C. Kerf

D. Gouging

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4

Which of the following statement is correct for oblique cutting system?

A. The cutting edge is inclined at an angle less than 90° with the normal to the velocity of the tool.

B. Frequently, more than one cutting edges are in action.

C. The chip flows on the tool face at an angle less than 90° with the normal on the cutting edge.

D. All of the above

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4

Match the following metal forming processes with their associated stresses in the work piece.
Metal forming processTypes of stress
1. CoiningP. Tensile
2. Wire DrawingQ. Shear
3. BlankingR. Tensile and compressive
4. Deep DrawingS. Compressive

A. 1-S, 2-P, 3-Q, 4-R

B. 1-S, 2-P, 3-R, 4-Q

C. 1-P, 2-Q, 3-S, 4-R

D. 1-P, 2-R, 3-Q, 4-S