Home

What is the correct answer?

4

Globular form of cementite is formed during the __________ process.

A. Spheroidising

B. Hardening

C. Annealing

D. Normalising

Correct Answer :

B. Hardening


Related Questions

What is the correct answer?

4

Vernier calipers cannot be used to measure the

A. I.D. & O.D. of the shaft

B. Thickness of parts

C. Depth of holes

D. Clearance between two mating surfaces

What is the correct answer?

4

An ideal material for making cooking vessels should have

A. High heat capacity

B. Low heat capacity

C. High thermal conductivity

D. Both (B) and (C)

What is the correct answer?

4

Pick out the wrong statement.

A. Lead can creep under its own weight at room temperature

B. The electrical conductivity of gold is considerably reduced by alloying additions due to the decrease in electron movement

C. Recrystallisation temperature decreases with decrease in strain in a cold worked metal

D. With increase in temperature, the electrical conductivity of intrinsic semi-conductor will increase

What is the correct answer?

4

Yield strength of a polycrystalline metal with an average grain size d, is proportional to

A. d1/2

B. d-1/2

C. d

D. d-1

What is the correct answer?

4

Which of the following alloying elements is present in maximum percentage in high speed steel?

A. Molybdenum

B. Chromium

C. Tungsten

D. Vanadium

What is the correct answer?

4

Silicon in steel

A. Makes it usable in almost all magnetic circuits where alternating current is used

B. Increases its electrical resistivity and decreases the hysteresis loss

C. Is present upto 5% & 4% respectively when used in transformers & motor armatures

D. All 'a', 'b' & 'c'

What is the correct answer?

4

Which of the following is not categorised as the ore agglomeration process?

A. Nodulising

B. Pelletising

C. Balling

D. Briquetting

What is the correct answer?

4

Metal cutting by oxy-acetylene flame is accomplished by the __________ of the metal.

A. Burning

B. Intensive oxidation

C. Evaporation

D. None of these

What is the correct answer?

4

Pick out the correct statement.

A. Hot worked materials are subjected to annealing to remove internal stresses

B. Annealing of steel hardens it slightly

C. Normalising of a material induces stresses

D. Tempering of a material improves ductility & toughness but reduces hardness & brittleness

What is the correct answer?

4

Nuclear fission of one atom of uranium-235 produces the energy equivalent to about __________ MeV.

A. 20

B. 200

C. 500

D. 2000

What is the correct answer?

4

Cold cracking in the heat affected zone of a high strength steel weld can take place because of the

A. Retained austenite

B. Martensite formation

C. Relatively high sulphur content in the base metal

D. Sufficient hydrogen present in the welding arc

What is the correct answer?

4

The main charge in blast furnace is usually

A. Iron ore & coke

B. Iron ore, coke & air

C. Limestone, coke & iron ore

D. Limestone, sand & iron ore

What is the correct answer?

4

Alcohols are not suitable as diesel engine fuel because the cetane number of alcohols is

A. Very low which prevents their ignition by compression

B. Very high which prevents their ignition by compression

C. Zero

D. None of these

What is the correct answer?

4

Steel produced from phosphatic iron is __________ in nature.

A. Malleable

B. Ductile

C. Brittle

D. Tough

What is the correct answer?

4

In Imperial Smelting Process for extraction of zinc, zinc vapour thus produced is quenched in the external condenser by the use of the following:

A. Jet of water at high pressure

B. Blast of air

C. Mixture of water and air

D. Rain of molten lead

What is the correct answer?

4

In multipass welds, shot peening is done after each pass to

A. Close the surface porosity

B. Break the continuity of columnar grains

C. Flatten the weldment

D. Introduce texture in the weld

What is the correct answer?

4

Desalination of water

A. Makes it potable

B. Makes it non-potable

C. Means distillation of water

D. None of these

What is the correct answer?

4

Current employed in resistance welding ranges from __________ kVA/.

A. 1.2 to 2.5

B. 4.5 to 6.2

C. 7.5 to 8.5

D. 10.5 to 15.5

What is the correct answer?

4

Hydrogen in liquid steels is dissolved

A. As tiny gas bubbles

B. In the atomic form

C. In the ionic form

D. In the molecular form

What is the correct answer?

4

Hooke's law

A. Applies to elastic deformation

B. Applies beyond limit of proportionality in stress-strain curve

C. States that stress is inversely proportional to strain upto elastic limit

D. None of these

What is the correct answer?

4

Angular displacement can be measured suitably by a

A. Shaft encoder

B. Linear variable differential transducer (LVDT)

C. Stroboscope

D. Tachometer

What is the correct answer?

4

For separating small pieces of metal from engine oil of a car, the best separating technique is the

A. Chromatography

B. Evaporation

C. Filtration

D. Fractional distillation

What is the correct answer?

4

Material of construction of foundry crucible is

A. Lead

B. Stainless steel

C. Graphite

D. Cast iron

What is the correct answer?

4

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

What is the correct answer?

4

Which of the following materials has the maximum shrinkage allowance?

A. Brass

B. Cast iron

C. Lead

D. Aluminium alloy

What is the correct answer?

4

While the thermosetting polymers are amorphous in nature, the thermoplastic polymers are either amorphous or crystalline. The crystalline polymers are characterised by the

A. Low impact strength

B. High flexibility

C. Better finish and surface appearance

D. High plastic deformation

What is the correct answer?

4

The amount of water evaporated in kg per kg of fuel burnt in a boiler is called the __________ of a boiler.

A. Evaporative capacity

B. Evaporation efficiency

C. Thermal efficiency

D. Steam load

What is the correct answer?

4

Colour comparator is used to measure the

A. pH value

B. Electrode potential

C. Colour intensity

D. None of these

What is the correct answer?

4

Earing is a defect found in steels after the following metal working operation.

A. Extrusion

B. Rolling

C. Deep drawing

D. Wire drawing

What is the correct answer?

4

As per international norms, the maximum permissible value of noise level in the industrial environment is __________ decibels as measured at a distance of 1.5 metres from the source of noise.

A. 110

B. 85

C. 60

D. 45