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__________ test is the appropriate test to determine whether a material is ductile or brittle.

A. Impact

B. Cupping

C. Hardness

D. Tensile

Correct Answer :

A. Impact


Related Questions

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Austempering process results in the formation of __________ structure.

A. Martensitic

B. Bainitic

C. Carburised

D. Stressed

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The dimensional formula of bulk modulus of elasticity is same as that of the

A. Pressure

B. Density

C. Force

D. None of these

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__________ is a special constituent of chlorophyll without which photosynthesis is not possible.

A. Calcium

B. Nitrogen

C. Phosphorous

D. Hydrogen

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4

Laser is a device to produce

A. Gamma rays

B. Microwaves

C. A beam of white light

D. A beam of coherent light

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Which of the following metals is not subjected to electrolytic refining/purification?

A. Copper

B. Zinc

C. Tin

D. Aluminium

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Consideration of the creep is the most important in case of the

A. Blades of gas turbine

B. Piston of an I. C. engine

C. Flywheel of steam engine

D. Cycle chain

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The amount of different substances produced, when the same quantity of electricity is passed through different solutions are proportional to their

A. Equivalent weight

B. (Equivalent weight)2

C. Molecular weight

D. (Molecular weight)2

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Which of the following has the least value of ultimate tensile strength (UTS)?

A. Medium carbon steel

B. High carbon steel

C. Cast iron

D. Wrought iron

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In an amorphous material, atoms defy any definite atomic structure and exist in random pattern just like in liquid. Which of the following is an amorphous material?

A. Tin

B. Lead

C. Zinc

D. Glass

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4

The starting of a car takes time in winter, because the

A. Octane number of fuel is decreased

B. Fuel supply for ignition is not sufficient

C. Vaporisation of the fuel is decreased

D. Pour point of fuel decreases

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__________ is used as a material of construction for the blade of power saw.

A. Wrought iron

B. Stainless steel

C. Mild steel

D. High speed steel

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Laser welding is widely employed in the __________ industries.

A. Electronic

B. Structural

C. Process

D. Heavy

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The approximate height of a blast furnace having a useful volume of 2000 m3 is about __________ metres

A. 25

B. 35

C. 55

D. 75

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Satellites burn off during re-entry to earth's atmosphere, because of the

A. Combustion with air

B. Gravitational pull by earth

C. Friction with earth's atmosphere

D. Loss in weight of the satellite

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Water flow in the river during flood can be categorised as the __________ flow.

A. Unsteady uniform

B. Unsteady non-uniform

C. Steady uniform

D. Steady non-uniform

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Strain hardening effect in metals subjected to cold working is due to the __________ mechanism.

A. Slip

B. Fracture

C. Winning

D. Dislocation

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__________ pipe is the most suitable for carrying sanitary drainage.

A. Stainless steel

B. Reinforced cement concrete

C. Cast iron

D. Asbestos cement

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The maximum stress below which a material can withstand an infinite number of cycle of stress, is termed as the

A. Fatigue strength

B. Creep strength

C. Resilience

D. Endurance limit

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Fire refining process is employed in case of

A. Tin

B. Copper

C. Zinc

D. Aluminium

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A steam carrying pipeline is insulated with two layers of insulating materials with the inferior insulation material forming the inner part. If the two insulating layers are interchanged, the heat conducted will

A. Increase

B. Decrease

C. Remain unaffected

D. May increase or decrease; depends on the thickness of each layer

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Pick out the wrong statement.

A. Seam welding, projection welding & spot welding are the classification of electrical resistance welding

B. Electrode tip in spot welding is of copper and the tip diameter should be equal to t (where, t = plate thickness to be welded)

C. In spot welding, two pieces to be joined are overlapped and placed between two electrodes

D. Mild steel sheet cannot be spot welded

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Thermal equivalent of electrical power in practical calculation is __________ kcal/kWh.

A. 746

B. 3000

C. 1000

D. 550

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Carbon supply in pack carburising process is in the form of

A. Charcoal

B. Calcium carbide

C. Hydrocarbon oil

D. Graphite

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The 'transition temperature' for ductile to brittle behaviour of steel increases with increase in the __________ content in steel.

A. Carbon

B. Manganese

C. Both 'a' nor 'b'

D. Neither 'a' nor 'b'

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Oxide layer formed on the non-ferrous metal surface after its annealing is

A. Removed by acid pickling

B. Hammered into the surface

C. Removed with coarse emery cloth

D. Left as such to protect the surface

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The elastic strain in copper is due to the

A. Motion of dislocations

B. Stretching of atomic bonds

C. Breakage of atomic bonds

D. None of the above

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Transition from laminar to turbulent zone in free convection heat transfer is governed by the critical value of

A. Grashoff number

B. Grashoff number & Reynolds number

C. Reynolds number

D. Grashoff number & Prandtl number

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4

Biological shield in a nuclear reactor is generally provided to protect against the

A. α-rays

B. β-rays

C. Gamma rays & neutrons

D. Electrons

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A compact estimate about the amount of materials handling between various work stations is obtained from the

A. Gantt chart

B. Bin chart

C. String diagram

D. Travel chart

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Fibre reinforced plastic (FRP) are

A. Made of glass fibre and thermoplastic resins

B. Anisotropic

C. Made of thermosetting resin and glass fibre

D. Both 'b' & 'c'