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4

Which of the following process is used for preparing parts having large curved surfaces and thin sections?

A. Hot machining

B. Ultrasonic machining

C. ECM process

D. Chemical milling

Correct Answer :

D. Chemical milling


Related Questions

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The process of removing metal by a cutter which is rotated against the direction of travel of workpiece, is called

A. Up milling

B. Down milling

C. Face milling

D. End milling

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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

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

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

Which of the following process is used for preparing parts having large curved surfaces and thin sections?

A. Hot machining

B. Ultrasonic machining

C. ECM process

D. Chemical milling

What is the correct answer?

4

The lip angle of a single point tool is usually

A. 20° to 40°

B. 40° to 60°

C. 60° to 80°

D. None of these

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In machining metals, surface roughness is due to

A. Feed marks or ridges left by the cutting tool

B. Fragment of built-up edge on the machined surface

C. Cutting tool vibrations

D. All of these

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4

The average cutting speed for turning mild steel with a high speed steel tool is

A. 15 to 19 m/min

B. 25 to 31 m/min

C. 60 to 90 m/min

D. 90 to 120 m/min

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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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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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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

The angle between the lathe centres is

A. 30°

B. 45°

C. 60°

D. 90°

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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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In _________ operation, the chip thickness is minimum at the beginning of the cut and it reaches to the maximum when the cut terminates.

A. Conventional milling

B. Climb milling

C. Face milling

D. End milling

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The cutting speed for drilling aluminium, brass and bronze with carbon steel drills is _________ cutting speed for drilling mild steel with high speed steel drills.

A. Equal to

B. Less than

C. More than

D. None of these

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4

In a metal arc welding process, metal transfer across the arc may take place by a method of material transfer where the metal transfers across the arc is in larger drops. This is at the rate of 100 drops / sec or less, what is this known as

A. Globular transfer

B. Spray transfer

C. GMAW practice

D. Dip transfer

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Which of the following statement is correct about nose radius?

A. It improves tool life

B. It improves the surface finish

C. Both (A) and (B)

D. None of these

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Which of the following arc welding processes does not use consumable electrodes?

A. GMAW

B. GTAW

C. Submerged Arc Welding

D. None of these

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Broaching is applied for machining

A. Internal and external surfaces

B. Round or irregular shaped holes

C. External flat and contoured surfaces

D. All of these

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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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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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The aluminium oxide abrasive is chiefly used for grinding

A. High speed steel

B. Carbon steel

C. Wrought iron

D. All of these

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4

The structure of a grinding wheel depends upon

A. Hardness of the material being ground

B. Nature of the grinding operation

C. Finish required

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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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

Quality screw threads are produced by

A. Thread milling

B. Thread chasing

C. Thread cutting with single point tool

D. Thread casting

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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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The abrasive recommended for grinding materials of low tensile strength is

A. Silicon carbide

B. Aluminium oxide

C. Sand stone

D. Diamond

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The example of snag grinding is

A. Trimming the surface left by sprues and risers on castings

B. Grinding the parting line left on castings

C. Removing flash on forgings

D. All of these

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4

The average cutting speed for turning brass with a high speed steel tool is

A. 15 to 19 m/min

B. 25 to 31 m/min

C. 60 to 90 m/min

D. 90 to 120 m/min