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4

In drilling softer materials, the cutting speed is _________ as compared to harder materials.

A. Same

B. Low

C. High

D. None of these

Correct Answer :

C. High


Related Questions

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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 hard grade grinding wheels are denoted by the letters

A. A to H

B. I to P

C. Q to Z

D. A to P

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4

Which among the NC operations given below are continuous path operations? Arc Welding (AW), Drilling (D), Laser Cutting of Sheet Metal (LC), Milling (M), Punching in Sheet Metal (P), Spot Welding (SW)

A. AW, LC and M

B. AW, D, LC and M

C. D, LC, P and SW

D. D, LC, and SW

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4

In order to have interference fit, it is essential that the lower limit of the shaft should be

A. Greater than the upper limit of the hole

B. Lesser than the upper limit of the hole

C. Greater than the lower limit of the hole

D. Lesser than the lower limit of the hole

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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

Gear lapping is an operation

A. After heat treatment

B. Prior to heat treatment

C. For gear reconditioning

D. None of these

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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

An expendable pattern is used in

A. Slush casting

B. Squeeze casting

C. Centrifugal casting

D. Investment casting

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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

In the relation VTn = C, the value of n for carbide tools is

A. 0.1 to 0.2

B. 0.20 to 0.25

C. 0.25 to 0.40

D. 0.40 to 0.55

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4

Two plates of the same metal having equal thickness are to be butt welded with electric arc. When the plate thickness changes, welding is achieved by

A. Adjusting the current

B. Adjusting the duration of current

C. Changing the electrode size

D. Changing the electrode coating

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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

What is the type of joining process called, where the parts to be welded are kept in contact and rotated relative to each other and axial pressure is applied when the desired temperature is obtained?

A. Ultrasonic welding

B. Forge welding

C. Electron beam welding

D. Friction welding

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4

Stellite preserves hardness upto a temperature of

A. 350°C

B. 500°C

C. 900°C

D. 1100°C

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4

The tail stock set over method of taper turning is preferred for

A. Internal tapers

B. Small tapers

C. Long slender tapers

D. Steep tapers

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4

The factor considered for evaluation of machinability is

A. Cutting forces and power consumption

B. Tool life

C. Type of chips and shear angle

D. All of these

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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

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

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

A set of eight form relieved milling cutters for each module is provided to enable cutting of gears of different

A. Materials

B. Types of gears

C. Number of teeth

D. Width of gears

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4

Dielectric is used in

A. Electrochemical machining

B. Ultrasonic machining

C. Electro discharge machining

D. Laser machining

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4

The thrust force will increase with the increase in

A. Side cutting edge angle

B. Tool nose radius

C. Rake angle

D. End cutting edge angle

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4

The angle between the shear plane and __________ is called shear angle.

A. Work surface

B. Tool face

C. Machine surface

D. None of these

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4

The guideways are of

A. Flat type

B. V-type

C. Dovetail type

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

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

Two streams of liquid metal which are not hot enough to fuse properly result into a casting defect known as

A. Cold shut

B. Swell

C. Sand wash

D. Scab

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4

In drilling softer materials, the cutting speed is _________ as compared to harder materials.

A. Same

B. Low

C. High

D. None of these

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4

A process of removing metal by pushing or pulling a cutting tool is called

A. Up milling

B. Down milling

C. Forming

D. Broaching

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4

The silicon carbide abrasive is chiefly used for grinding

A. Cemented carbide

B. Ceramic

C. Cast iron

D. All of these