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4

The operation of producing grooves around the periphery of a cylindrical or conical workpiece is called

A. Profile milling

B. Gang milling

C. Saw milling

D. Helical milling

Correct Answer :

D. Helical milling


Related Questions

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4

In machining metal, cutting force at the cutting edge is measured by a

A. Wattmeter

B. Dynamometer

C. Hydrometer

D. Pyrometer

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4

When 3-2-1 principle is used to support and locate a three dimensional work-piece during machining, the number of degrees of freedom that are restricted is

A. 7

B. 8

C. 9

D. 10

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4

The velocity of tool along the tool face is known as

A. Shear velocity

B. Chip velocity

C. Cutting velocity

D. Mean velocity

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4

Internal gear cutting operation can be performed by

A. Milling

B. Shaping with rack cutter

C. Shaping with pinion cutter

D. Hobbing

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4

Which of the following statement is wrong about ultrasonic machining?

A. It is best suited for machining hard and brittle materials

B. It cuts materials at very slow speeds

C. It removes large amount of material

D. It produces good surface finish

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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 different spindle speeds on a lathe form

A. Arithmetical progression

B. Geometrical progression

C. Harmonical progression

D. Any one of these

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4

The percentage of carbon in gray cast iron is in the range of

A. 0.25 to 0.75 percent

B. 1.25 to 1.75 percent

C. 3 to 4 percent

D. 8 to 10 percent

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4

The depth of cut in drilling is __________ the drill diameter.

A. Equal to

B. One-fourth

C. One-half

D. Double

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4

When the shear angle is small

A. Path of shear is short and chip is thin

B. Path of shear is large and chip is thick

C. Path of shear is short and chip is thick

D. Path of shear is large and chip is thin

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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 snag grinding is done

A. To produce good surface finish and high degree of accuracy

B. To remove considerable amount of metal without regard to accuracy of the finished surface

C. To grind exterior cylindrical surfaces

D. Any one of the above

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4

In a particular type of welding, flux is prepared in the form of a coarse powder and granulated flux is spread over the joint. What is this type of welding process called?

A. Electric arc welding

B. Submerged arc welding

C. MIG welding

D. TIG welding

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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

Buffing wheels are made of

A. Softer metals

B. Cotton fabric

C. Carbon

D. Graphite

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4

What is the name of the device used in arc welding circuits for the purpose of modifying the rate of current change when the weld road is varied rapidly?

A. Reactor

B. Kerf

C. Inductor

D. Cone

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4

In a shaper, the metal is removed during

A. Forward stroke

B. Return stroke

C. Both the forward and return strokes

D. Neither the forward nor the return stroke

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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

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

Volume of a cube of side l and volume of a sphere of radius r are equal. Both the cube and the sphere are solid and of same material. They are being cast. The ratio of the solidification time of the cube to the same of the sphere is

A. (4π/6)³ × (r/l)⁶

B. (4π/6) × (r/l)²

C. (4π/6)² × (r/l)³

D. (4π/6)² × (r/l)⁴

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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

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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

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

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 is minimum while machining _________ with a high speed steel tool.

A. Cast iron

B. Mild steel

C. Brass

D. Aluminium

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4

The process of improving the cutting action of the grinding wheel is called

A. Truing

B. Dressing

C. Facing

D. Clearing

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4

EDM machining is applied for

A. Shaping carbide dies and punches having complicated profiles

B. Making large number of small holes in sieves and fuel nozzles

C. Embossing and engraving on harder materials

D. All of these

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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

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

Negative rakes are used for

A. Carbide tools

B. Heavy loads

C. Harder materials

D. All of these