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4

The increase in depth of cut and feed rate __________ surface finish.

A. Improves

B. Deteriorates

C. Does not effect

D. None of these

Correct Answer :

B. Deteriorates


Related Questions

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4

What is the type of welding defect caused due to poor manipulation of weld rod or a dirty joint called?

A. Porosity

B. Undercut

C. Under fill

D. Crack

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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

If the diameter of the hole is subject to considerable variation, then for locating in jigs and fixtures, the pressure type of locator used is

A. Conical locator

B. Cylindrical locator

C. Diamond pin locator

D. Vee locator

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4

In lapping operation, the amount of metal removed is

A. 0.005 to 0.01 mm

B. 0.01 to 0.1 mm

C. 0.05 to 0.1 mm

D. 0.5 to 1 mm

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4

With the same tool life, the maximum material per minute is removed by

A. Increasing the cutting speed

B. Decreasing the cutting speed

C. Increasing the depth of cut

D. Increasing the feed rate

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4

Cold working of steel is defined as working

A. At its recrystallisation temperature

B. Above its recrystallisation temperature

C. Below its recrystallisation temperature

D. At two thirds of the melting temperature of the metal

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4

The tool made of cemented carbide wear out faster at

A. Slow speeds

B. Medium speeds

C. Fast speeds

D. Very fast speeds

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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

A grinding wheel is said to be of _________ if it holds the abrasive grains more securely.

A. Soft grade

B. Medium grade

C. Hard grade

D. None of these

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4

The high cutting speed and large rake angle of the tool will result in the formation of

A. Continuous chips

B. Discontinuous chip

C. Continuous chips with built up edge

D. None of these

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4

In plunge grinding

A. The work is reciprocated as the wheel feeds to produce cylinders longer than the width of wheel face

B. The work rotates in a fixed position as the wheel feeds to produce cylinders equal to or shorter than the width of wheel face

C. The work is reciprocated as the wheel feeds to produce cylinders shorter than the width of wheel face

D. The work rotates in a fixed position as the wheel feeds to produce cylinders longer than the width of wheel face

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4

The correct sequence of tool materials in increasing order of their ability to retain their hot hardness is

A. Carbide, ceramic, cermet, borazon

B. Ceramic, carbide, borazon, cermet

C. Cermet, carbide, ceramic, borazon

D. Borazon, ceramic, carbide, cermet

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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 cutting speed for drilling copper with high speed steel drills varies from

A. 10 to 20 m/min

B. 18 to 30 m/min

C. 24 to 45 m/min

D. 60 to 90 m/min

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4

In _________ operation, the cutting force is maximum when the tooth begins its cut and reduces it to minimum when the tooth leaves the work.

A. Up milling

B. Down milling

C. Face milling

D. End milling

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4

For harder alloy steel, 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

Shrinkage allowance on pattern is provided to compensate for shrinkage when

A. The temperature of liquid metal drops from pouring to freezing temperature

B. The metal changes from liquid to solid state at freezing temperature

C. The temperature of solid phase drops from freezing to room temperature

D. The temperature of metal drops from pouring to room temperature

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4

The grooving 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

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

The negative rake is usually provided on

A. High carbon steel tools

B. High speed steel tools

C. Cemented carbide tools

D. All of these

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4

The abrasive slurry used in ultrasonic machining contains fine particles of

A. Aluminium oxide

B. Boron carbide

C. Silicon carbide

D. Any one of these

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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 hardness of a grinding wheel is specified by

A. Brinell hardness number

B. Rockwell hardness number

C. Vickers pyramid number

D. Letter of alphabet

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4

The correct sequence of the following parameters in order of their maximum to minimum influence on tool life is

A. Feed rate, depth of cut, cutting speed

B. Depth of cut, cutting speed, feed rate

C. Cutting speed, feed rate, depth of cut

D. Feed rate, cutting speed, depth of cut

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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

The type of tool used on lathe, shaper and planer 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

What is the type of welding defect caused due to poor deposition of weld rod is called?

A. Porosity

B. Undercut

C. Under fill

D. Crack

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4

The chuck used for setting up of heavy and irregular shaped work should be

A. Four jaw independent chuck

B. Three jaw universal chuck

C. Magnetic chuck

D. Drill chuck

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4

The obtuse angle, included between the chisel edge and the lip as viewed from the end of a drill, is called

A. Helix or rake angle

B. Point angle

C. Chisel edge angle

D. Lip clearance angle

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4

The specific cutting energy used for establishing the machinability of the metal depends upon its

A. Coefficient of friction

B. Microstructure

C. Work hardening characteristics

D. All of these