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Wohler test is a destructive test to find out the __________ strength of a prepared metal specimen.

A. Creep

B. Fatigue

C. Endurance

D. Tensile

Correct Answer :

B. Fatigue


Related Questions

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Use of water as a manometric liquid suffers from the disadvantage of its

A. Low vapour pressure

B. Corrosive nature

C. High vapour pressure

D. High boiling point

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4

Propulsion of rocket follows from the

A. Newton's second law of motion

B. Newton's third law of motion

C. Law of projectiles

D. Archimedes principle

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__________ temperature remains constant during adiabatic saturation process of unsaturated air.

A. Dew point

B. Dry bulb

C. Wet bulb

D. None of these

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Which of the following is not a ferromagnetic material?

A. Nickel

B. Cobalt

C. Aluminium

D. Iron

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Limestone is added in the blast furnace (during pig iron manufacture) to

A. Form slag by combining with impurities

B. Supply heat by undergoing exothermic reaction with impurities

C. Reduce the coke consumption

D. Reduce slag viscosity

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At absolute zero temperature, for any reaction involving condensed phases

A. Δ G° = 0 , Δ H° = 0

B. Δ H° = 0 , Δ S° = 0

C. Δ S° = 0 , Δ E° = 0

D. Δ S° = 0 , Δ Cp° = 0

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On being hit with a hammer, __________ will readily fracture.

A. Brass

B. Mild steel

C. Cast iron

D. Lead

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Coarse grained steels have

A. Low toughness

B. No tendency to distort

C. High density

D. Very high toughness

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On decreasing the grain size of a polycrystalline material, the property most likely to deteriorate is

A. Creep

B. Toughness

C. Tensile strength

D. Fatigue

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Dryness factor of steam is defined as the ratio of the mass of vapor in the mixture to the mass of the mixture. Dryness factor of steam is measured by a __________ calorimeter.

A. Bomb

B. Throttling

C. Junker's

D. Boy's

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In a neutral solution

A. H+ ions are absent

B. OH- ions are absent

C. Both H+ and OH- ions are present in very small but equal concentration

D. None of these

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Screws are specified by their __________ diameters.

A. Minor

B. Major

C. Pitch

D. None of these

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The product out from a cupola is called

A. Wrought iron

B. Pig iron

C. Cast iron

D. None of these

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Which of the following is the largest quantum of pressure?

A. 1 kg/cm2

B. 1 bar

C. 1 atmosphere

D. 1 kilo Pascal

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Which of the following varies as the square root of oil pressure during atomisation of fuel oil through a pressure jet burner?

A. Output & fineness

B. Velocity

C. Both (A) & (B)

D. None of these

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Reduction in the grain size reduces the __________ of the material.

A. Fatigue resistance

B. Tensile strength

C. Creep resistance

D. All (A), (B) & (C)

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For an ideal gas, Cp - Cv is

A. R

B. -R

C. 0

D. (3/2) R

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The property of material, by which a given amount of energy is absorbed by it without plastic deformation, is called the

A. Resilience

B. Toughness

C. Ductility

D. Impact strength

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Unbreakable crockeries are made from __________ polymers.

A. Polystyrene

B. Melamine

C. Polystyrene

D. Polyurethane

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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

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4

Hot dipping process is used for coating a low melting point metal (e.g. Pb, Sn, Zn) on iron, steel & copper having relatively higher melting points. Which of the following is not a hot dipping process?

A. Galvanising

B. Tinning

C. Sherardizing

D. None of these

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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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Referring to the periodic table of elements, it is found that with increasing atomic number. The atomic size in the same

A. Period increases

B. Period decreases

C. Group increases

D. Both 'b' & 'c'

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The temperature at which ferromagnetic material can no longer be magnetised by the outside forces, is termed as the

A. Critical point

B. Curie temperature

C. Inversion temperature

D. Eutectic temperature

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The majority charge carriers in p-type silicon are

A. Free electrons

B. Ions

C. Conduction electrons

D. Holes

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Notched bar test is used for testing the __________ of a material.

A. Impact strength

B. Endurance limit

C. Machinability

D. Corrosion resistance

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Evaporative cooling process employs a combination of cooling and humidification in which the

A. Sensible heat is added

B. Sensible heat is removed and the latent heat is added

C. Latent heat is removed

D. Sensible heat is added and latent heat is removed

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The yield point phenomenon observed in annealed low carbon steel is due to the presence of the following element.

A. Silicon

B. Carbon

C. Phosphorous

D. Chromium

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__________ furnace is generally used in the non-ferrous foundries.

A. Direct arc

B. Indirect arc

C. Resistance

D. Induction

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The ratio of thermal & electrical conductivity is same for all the metals at the same temperature; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K)

A. T

B. 1/T

C. T2

D. 1/T2