Case hardening of a material is

Question

Case hardening of a material is

A. Followed by tempering or carburising

B. Preceded by its tempering

C. Done to get a soft ductile interior with a very hard surface

D. Carried out to get extreme hardness in its core

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Heat release during phase change is observed in case of a/an

A. Boiler

B. Condenser

C. Evaporator

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

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Electrical conductivities of semi-conductors are of the order of __________ ohm/cm.

A. 10^-3

B. 10³

C. 10^-15

D. 10¹⁵

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Reynolds number of a fluid flowing in a circular pipe is 10,000. What will be the Reynolds number when the fluid velocity is decreased by 30% & the pipe diameter is increased by 30%?

A. 9,100

B. 13,000

C. 7,000

D. 2,550

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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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Inertial forces are obtained, when the elastic forces are multiplied by __________ number.

A. Mach

B. Froude

C. Reynolds

D. Euler

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The fugacity of liquid water at 298 K is approximately 3171 P_a. Considering the ideal heat of vaporisation as 43723 J/gm.mole, its fugacity at 300 K would be

A. 3171P_a

B. 3567P_a

C. 1.01 × 10⁵P_a

D. 5000P_a

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Which of the following is not the function of a volute casing provided in a centrifugal pump?

A. To reduce the head loss in discharge

B. To increase the pump efficiency

C. To collect liquid from the periphery of the impeller and to transmit it to the delivery pipe at constant velocity

D. To increase the pump discharge rate

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Principal alloying elements of cast tool alloys which have very high wear resistance & high temperature strength are

A. Cobalt, chromium & tungsten

B. Cobalt, chromium & nickel

C. Molybdenum, tungsten & chromium

D. Cobalt, zirconium & molybdenum

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M10 index of coke indicates its

A. Compressive strength

B. Hardness

C. Abrasion resistance

D. Impact strength

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Out of the following, the most malleable material is

A. Copper

B. Aluminium

C. Wrought iron

D. Lead

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Energy to be supplied to the radioactive nucleus for the emission of a neutron is __________ MeV.

A. 0.8

B. 7.8

C. 200

D. 10000

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Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother?

A. Cresylic acid

B. Xanthaies

C. Pine oil

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

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Depreciation of machines fails under the indirect expenses head. As per income tax regulations, it is calculated by the __________ method.

A. Diminishing balance

B. Sinking fund

C. Multiple straight line

D. Sum of the years digit

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A thin, flat & square plate measuring 2 m × 2 m is freely hanging in ambient air at 25°C. It is exposed to the solar radiation falling on one side of the plate at the rate of 500 W/m². The plate temperature will remain constant at 30°C, if the convective heat transfer co-efficient is __________ W/m² °C.

A. 50

B. 100

C. 150

D. 200

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The rolling process cannot be used to produce

A. Plates

B. Rods

C. Tubes

D. Wires

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The excess air required for the combustion of pulverised coal is of the order of about __________ percent.

A. 5

B. 15

C. 30

D. 45

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Atomic __________ is a whole number for an element.

A. Number

B. Weight

C. Radius

D. None of these

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Energy of the sun arises mainly from __________ reactions.

A. Fusion

B. Fission

C. Combustion

D. None of these

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Which of the following is not a characteristic observed in material failure by fatigue fracture?

A. Plastic deformation of material does not occur

B. Initiation of crack from below the surface does not occur

C. Initiation of crack occurs on the surface of the machine part

D. Presence of both rough & smooth zone with conchoidal markings in smooth zone of the surface

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On oscilloscope screen for dynamic measurement, lissajous diagram is normally used to determine the __________ of the input signal.

A. Frequency

B. Amplitude

C. Damping

D. None of these

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Density in the solid state is slightly less than that in its liquid state, in case of

A. Carbon dioxide

B. Water

C. Mercury

D. None of these

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Work hardenable alloy steel used to make the bucket wheel excavators, blades of bulldozers and other earth moving equipments contain iron, carbon and

A. Manganese

B. Silicon

C. Nickel

D. Chromium

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Large diameter reinforced cement concrete (RCC) pipes are generally joined by __________ joint.

A. Flanged iron

B. Collar

C. Flexible

D. Expansion

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Liquor poisoning generally occurs due to the presence of __________ in it.

A. Ethyl alcohol

B. Impurities

C. Methyl alcohol

D. Carbonic acid

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Which one can be directly solidified from gaseous state without entering into liquid state?

A. Helium

B. Oxygen

C. Carbon dioxide

D. None of these

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__________ cannot increase the fatigue strength of a material.

A. Grain refining

B. Grain coarsening

C. Surface hardening

D. Shot peening

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'Dikes' are low height walls made around the storage vessels meant for storing hazardous & inflammable material (e.g., petroleum products). Volume of dikes is equal to (where, V = volume of the storage vessel)

A. V

B. V/2

C. 2V

D. 3V

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What is the range of tempering temperature (°C) for most of the materials?

A. 75-100

B. 200-300

C. 350-450

D. 500-600

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Parallel straight line pattern of temperature distribution for both hot and cold fluids is observed in case of heat exchanger of the type

A. Parallel flow with equal heat capacities

B. Counter flow with equal heat capacities

C. Counter flow with unequal heat capacities

D. Parallel flow with unequal heat capacities

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Which of the following if present in iron ore, enhances its value?

A. Alumina

B. Alkali oxide

C. Lime & Magnesia

D. None of these

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Accepted Answer

D. Carried out to get extreme hardness in its core

Case hardening of a material is

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Heat release during phase change is observed in case of a/an

Electrical conductivities of semi-conductors are of the order of __________ ohm/cm.

Reynolds number of a fluid flowing in a circular pipe is 10,000. What will be the Reynolds number when the fluid velocity is decreased by 30% & the pipe diameter is increased by 30%?

Coarse grained steels have

Inertial forces are obtained, when the elastic forces are multiplied by __________ number.

The fugacity of liquid water at 298 K is approximately 3171 P_a. Considering the ideal heat of vaporisation as 43723 J/gm.mole, its fugacity at 300 K would be

Which of the following is not the function of a volute casing provided in a centrifugal pump?

Principal alloying elements of cast tool alloys which have very high wear resistance & high temperature strength are

M10 index of coke indicates its

Out of the following, the most malleable material is

Energy to be supplied to the radioactive nucleus for the emission of a neutron is __________ MeV.

Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother?

Depreciation of machines fails under the indirect expenses head. As per income tax regulations, it is calculated by the __________ method.

The rolling process cannot be used to produce

The excess air required for the combustion of pulverised coal is of the order of about __________ percent.

Atomic __________ is a whole number for an element.

Energy of the sun arises mainly from __________ reactions.

Which of the following is not a characteristic observed in material failure by fatigue fracture?

On oscilloscope screen for dynamic measurement, lissajous diagram is normally used to determine the __________ of the input signal.

Density in the solid state is slightly less than that in its liquid state, in case of

Work hardenable alloy steel used to make the bucket wheel excavators, blades of bulldozers and other earth moving equipments contain iron, carbon and

Large diameter reinforced cement concrete (RCC) pipes are generally joined by __________ joint.

Liquor poisoning generally occurs due to the presence of __________ in it.

Which one can be directly solidified from gaseous state without entering into liquid state?

__________ cannot increase the fatigue strength of a material.

'Dikes' are low height walls made around the storage vessels meant for storing hazardous & inflammable material (e.g., petroleum products). Volume of dikes is equal to (where, V = volume of the storage vessel)

What is the range of tempering temperature (°C) for most of the materials?

Parallel straight line pattern of temperature distribution for both hot and cold fluids is observed in case of heat exchanger of the type

Which of the following if present in iron ore, enhances its value?

Also checkout

Case hardening of a material is

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Heat release during phase change is observed in case of a/an

Electrical conductivities of semi-conductors are of the order of __________ ohm/cm.

Reynolds number of a fluid flowing in a circular pipe is 10,000. What will be the Reynolds number when the fluid velocity is decreased by 30% & the pipe diameter is increased by 30%?

Coarse grained steels have

Inertial forces are obtained, when the elastic forces are multiplied by __________ number.

The fugacity of liquid water at 298 K is approximately 3171 Pa. Considering the ideal heat of vaporisation as 43723 J/gm.mole, its fugacity at 300 K would be

Which of the following is not the function of a volute casing provided in a centrifugal pump?

Principal alloying elements of cast tool alloys which have very high wear resistance & high temperature strength are

M10 index of coke indicates its

Out of the following, the most malleable material is

Energy to be supplied to the radioactive nucleus for the emission of a neutron is __________ MeV.

Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother?

Depreciation of machines fails under the indirect expenses head. As per income tax regulations, it is calculated by the __________ method.

The rolling process cannot be used to produce

The excess air required for the combustion of pulverised coal is of the order of about __________ percent.

Atomic __________ is a whole number for an element.

Energy of the sun arises mainly from __________ reactions.

Which of the following is not a characteristic observed in material failure by fatigue fracture?

On oscilloscope screen for dynamic measurement, lissajous diagram is normally used to determine the __________ of the input signal.

Density in the solid state is slightly less than that in its liquid state, in case of

Work hardenable alloy steel used to make the bucket wheel excavators, blades of bulldozers and other earth moving equipments contain iron, carbon and

Large diameter reinforced cement concrete (RCC) pipes are generally joined by __________ joint.

Liquor poisoning generally occurs due to the presence of __________ in it.

Which one can be directly solidified from gaseous state without entering into liquid state?

__________ cannot increase the fatigue strength of a material.

'Dikes' are low height walls made around the storage vessels meant for storing hazardous & inflammable material (e.g., petroleum products). Volume of dikes is equal to (where, V = volume of the storage vessel)

What is the range of tempering temperature (°C) for most of the materials?

Parallel straight line pattern of temperature distribution for both hot and cold fluids is observed in case of heat exchanger of the type

Which of the following if present in iron ore, enhances its value?

Also checkout

The fugacity of liquid water at 298 K is approximately 3171 P_a. Considering the ideal heat of vaporisation as 43723 J/gm.mole, its fugacity at 300 K would be