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4

For cutting brass, the hacksaw blade should have __________ teeth per 25 mm.

A. 14

B. 24

C. 32

D. 40

Correct Answer :

A. 14


Related Questions

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A ring gauge is used to

A. Check the diameter of shafts or studs

B. Test the accuracy of holes

C. Check the clearance between two mating surfaces

D. All of the above

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A rip saw

A. Is a two man saw

B. Is used for cutting along the grains of wood

C. Has a narrow blade with two wooden handles

D. All of the above

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The tolerance produced by shell moulding process of casting is

A. +0.05 mm

B. ±0.2 mm

C. +0.5 mm

D. ±1 mm

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For arc welding

A. Alternating current with high frequency is used

B. Alternating current with low frequency is used

C. Direct current is used

D. Any one of these

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4

A three high rolling mill consists of three rolls placed one above the other. Which of the following statement is correct?

A. The upper and middle rolls rotate in the same direction whereas the bottom roll rotates in opposite direction

B. The upper and bottom rolls rotate in the same direction whereas the middle roll rotates in opposite direction

C. The bottom and middle roll rotate in the same direction

D. Any one of the above

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A file removes the metal during

A. Forward stroke

B. Return stroke

C. Both forward and return strokes

D. None of these

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In sheet metal work, he cutting force on the tool can be reduced by

A. Grinding the cutting edges sharp

B. Increasing the hardness of tool

C. Providing shear on tool

D. Increasing the hardness of die

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A moving mandrel is used in

A. Wire drawing

B. Tube drawing

C. Metal cutting

D. Forging

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The brass and bronze are welded by _________ flame.

A. Neutral

B. Oxidising

C. Carburising

D. All of these

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A mortise gauge is a

A. Striking tool

B. Planing tool

C. Boring tool

D. Marking tool

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The cold chisels are made by

A. Drawing

B. Rolling

C. Piercing

D. Forging

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The diaphragm moulding machine is used to

A. Ram the sand harder at the pattern face with decreasing hardness towards the back of the mould

B. Ram the sand harder at the back of the mould and softer on the pattern face

C. Produce uniform packing of sand in the mould

D. Give uniform sand hardness throughout the mould

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4

The instrument which has all the features of try-square, bevel protractor, rule and scriber, is

A. Outside micrometer

B. Inside micrometer

C. Depth gauge micrometer

D. Combination set

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4

The property of sand due to which it evolves a great amount of steam and other gases is called

A. Collapsibility

B. Permeability

C. Cohesiveness

D. Adhesiveness

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The oxyacetylene gas used in gas welding produce a flame temperature of

A. 1800°C

B. 2100°C

C. 2400°C

D. 3200°C

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4

The centrifugal casting method, is used for casting articles of

A. Symmetrical shape about vertical axis

B. Symmetrical shape about horizontal axis

C. Irregular shape

D. Nonferrous metal only

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A basic hole is one whose

A. Lower deviation is zero

B. Upper deviation is zero

C. Lower and upper deviations are zero

D. None of these

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A diamond pointed chisel is used for cutting

A. Flat surfaces

B. Grooves

C. Keyways

D. V-shaped grooves

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In a hot chamber die casting machine

A. Ferrous alloys with low melting temperature are casted

B. Ferrous alloys with high melting temperature are casted

C. Nonferrous alloys with low melting temperature are casted

D. Nonferrous alloys with high melting temperature are casted

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In arc welding, the electric arc is produced between the work and the electrode by

A. Voltage

B. Flow of current

C. Contact resistance

D. All of these

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During cold working process

A. Grain structure is distorted

B. Strength and hardness of metal increases

C. Close dimensional tolerance can be maintained

D. All of the above

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The adhesiveness is the property of sand due to which

A. It evolves a great amount of steam and other gases

B. The sand grains stick together

C. It clings to the sides of a moulding box

D. None of these

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Sand wash is a casting defect which

A. Results in a mismatching of the top and bottom parts of a casting

B. Results in general enlargement of the casting

C. Occurs near the ingates as rough lumps on the surface of a casting

D. Occurs as sand patches on the upper surface of a casting

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The teeth of hacksaw blade are bent

A. Towards right

B. Towards left

C. Alternately towards right and left and every third or fourth left straight

D. May be bent in any direction

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The punch and die set up is ________ for punching and piercing operation.

A. Same

B. Similar

C. Different

D. None of these

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In a four high rolling mill, there are four rolls out of which

A. One is working roll and three are backing up rolls

B. Two are working rolls and two are backing up rolls

C. Three are working rolls and one is backing up roll

D. All of the four are working rolls

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The process extensively used for making bolts and nuts is

A. Hot piercing

B. Extrusion

C. Cold peening

D. Cold heading

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The purpose of a riser is to

A. Deliver molten metal into the mould cavity

B. Act as a reservoir for the molten metal

C. Feed the molten metal to the casting in order to compensate for the shrinkage

D. Deliver the molten metal from pouring basin to gate

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The operation of producing cup shaped parts from flat sheet metal blanks by bending and plastic flow of metal, is known as

A. Drawing

B. Squeezing

C. Coining

D. Planishing

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The operation of straightening a curved sheet metal, is known as

A. Drawing

B. Squeezing

C. Coining

D. Planishing