Pick out the wrong statement.

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Pick out the wrong statement.

A. A ferromagnetic material becomes paramagnetic above the 'Curie temperature'

B. Permanent magnets are made of hard materials, whereas electromagnets require soft magnetic materials

C. Soft magnetic materials (e.g., pure iron) have higher permeability and low hysterisis loss and coercive forces

D. Tungsten steel and alnico are not hard magnetic materials

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Fibre glass is a composite material of

A. Glass fibre in a polymer matrix

B. Glass fibre in a metallic matrix

C. Polymer fibre in a glassy matrix

D. Both 'b' & 'c'

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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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The atmospheric temperature during melting of ice/snow (in the atmosphere)

A. Decreases

B. Increases

C. Remain same

D. May increase or decrease; depends on the altitude where snow melts

Discuss this answer

Eutectoid composition of carbon steel at room temperature is

A. Cementite

B. Pearlite

C. Martensite

D. Ferrite

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Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity)

A. 1/k

B. k

C. k²

D. 1/k²

Discuss this answer

Pick out the wrong statement.

A. Geothermal energy is a non-conventional source of energy

B. Mass is converted into energy in both nuclear fission & fusion reaction

C. Inhalation of mercury vapour is not harmful for human beings

D. Inhalation of arsenic causes cancer

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In case of a, centrifugal pump, the ratio h₁/h₂ is termed as the __________ efficiency (where, h₁ = actual measured head & h₂ = head imparted to the fluid by impeller).

A. Mechanical

B. Overall

C. Volumetric

D. Impeller

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Ultimate strength in tension as compared to that in shear for steel is

A. Half

B. One third

C. One and half times

D. One fourth

Discuss this answer

What is the percentage of chromium in 18-4-1 high speed steel?

A. 1

B. 4

C. 18

D. 23

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Ganister contains maximum percentage of

A. FeO

B. SiO2

C. MgO

D. MnO2

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Catalyst used in the catalytic converter employed in automobiles to convert CO into CO2 and for complete oxidation of un-burnt hydrocarbons is

A. Nickel

B. Cobalt

C. Vanadium

D. Platinum

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Unbreakable crockeries are made from __________ polymers.

A. Polystyrene

B. Melamine

C. Polystyrene

D. Polyurethane

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Which of the following metals cannot be hot worked at room temperature?

A. Zinc

B. Nickel

C. Lead

D. Tin

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According to thermodynamic Fahrenheit scale, the fundamental interval between ice point to steam point is

A. 180°

B. 212°

C. 32°

D. 273°

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Nickel and __________ are the alloying element added in steel to increase its toughness.

A. Molybdenum

B. Chromium

C. Vanadium

D. Silicon

Discuss this answer

Steel balls are manufactured by

A. Sintering

B. Casting

C. Cold heading

D. Spinning

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Water hammer is caused in steam carrying pipelines, because of

A. Partial condensation of steam

B. Vibration of the pipeline

C. High degree of superheat of steam

D. Its exposure to torrential rain

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Cast iron contains __________ percent carbon.

A. 2.5

B. 3.75

C. 4.75

D. 5.25

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Tin based white metals are used, where bearings are subjected to

A. High pressure & load

B. Low pressure & load

C. High temperature

D. Large surface wear

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In fluid flow, and heat and mass transfer, one encounters (i) kinematic velocity (μ), (ii) molecular diffusivity (θ) and thermal diffusivity (α). The units of these quantities are.

A. μ , α and θ all have units of m/s

B. μ , α and θ all have units of m2/s

C. α and θ have units of m2/s, while μ has unit of m/s

D. α and θ have units of m/s, while μ has unit of m2/s

Discuss this answer

__________ flux is used for the extraction of metal from its self fluxing ores.

A. No

B. Acid

C. Basic

D. Neutral

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The following thermocouple may be used for measuring temperature upto 1873°K.

A. Chromel-alumel

B. Copper-constantan

C. Platinum-platinum rhodium

D. Iron-constantan

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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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Pick out the wrong statement.

A. Copper is the metal having the highest electronic conductivity

B. Hardenability & Weldability of metals are inversely related

C. Covalent bonding formed by sharing of electrons is present in all semi-conductor materials

D. Glass transition temperature applies to 'polymers' but not to 'glasses'

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Fine grained steels have

A. High brittleness

B. Higher tendency to distort

C. High ductility

D. None of these

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A jig is used while __________ a hole.

A. Boring

B. Counter boring

C. Drilling

D. Enlarging

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For the Stoke's law to be valid in the case of a falling sphere in a fluid, the

A. Reynolds number (based on sphere diameter) should be < 1

B. Flow around the sphere should be in turbulent region

C. Sphere must be metallic

D. Fluid density should be constant

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The friction factor for the turbulent fluid flow in a rough pipe does not depend upon the

A. Pipe roughness & pipe diameter

B. Fluid velocity

C. Type of flowing fluid

D. Both 'b' & 'c'

Discuss this answer

Half life of a radioactive isotope corresponds to the time required for half of the __________ to decay.

A. Atoms

B. Neutrons

C. Nucleons

D. Electrons

Discuss this answer

The delivery pressure of boiler feed water pump compared to the boiler steam pressure is

A. Same

B. Slightly less

C. Slightly more

D. Much more

Discuss this answer

Accepted Answer

D. Tungsten steel and alnico are not hard magnetic materials

Pick out the wrong statement.

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Fibre glass is a composite material of

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

The atmospheric temperature during melting of ice/snow (in the atmosphere)

Eutectoid composition of carbon steel at room temperature is

Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity)

Pick out the wrong statement.

In case of a, centrifugal pump, the ratio h₁/h₂ is termed as the __________ efficiency (where, h₁ = actual measured head & h₂ = head imparted to the fluid by impeller).

Ultimate strength in tension as compared to that in shear for steel is

What is the percentage of chromium in 18-4-1 high speed steel?

Ganister contains maximum percentage of

Catalyst used in the catalytic converter employed in automobiles to convert CO into CO2 and for complete oxidation of un-burnt hydrocarbons is

Unbreakable crockeries are made from __________ polymers.

Which of the following metals cannot be hot worked at room temperature?

According to thermodynamic Fahrenheit scale, the fundamental interval between ice point to steam point is

Nickel and __________ are the alloying element added in steel to increase its toughness.

Steel balls are manufactured by

Water hammer is caused in steam carrying pipelines, because of

Cast iron contains __________ percent carbon.

Tin based white metals are used, where bearings are subjected to

In fluid flow, and heat and mass transfer, one encounters (i) kinematic velocity (μ), (ii) molecular diffusivity (θ) and thermal diffusivity (α). The units of these quantities are.

__________ flux is used for the extraction of metal from its self fluxing ores.

The following thermocouple may be used for measuring temperature upto 1873°K.

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.

Pick out the wrong statement.

Fine grained steels have

A jig is used while __________ a hole.

For the Stoke's law to be valid in the case of a falling sphere in a fluid, the

The friction factor for the turbulent fluid flow in a rough pipe does not depend upon the

Half life of a radioactive isotope corresponds to the time required for half of the __________ to decay.

The delivery pressure of boiler feed water pump compared to the boiler steam pressure is

Also checkout

Pick out the wrong statement.

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Fibre glass is a composite material of

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

The atmospheric temperature during melting of ice/snow (in the atmosphere)

Eutectoid composition of carbon steel at room temperature is

Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity)

Pick out the wrong statement.

In case of a, centrifugal pump, the ratio h1/h2 is termed as the __________ efficiency (where, h1 = actual measured head & h2 = head imparted to the fluid by impeller).

Ultimate strength in tension as compared to that in shear for steel is

What is the percentage of chromium in 18-4-1 high speed steel?

Ganister contains maximum percentage of

Catalyst used in the catalytic converter employed in automobiles to convert CO into CO2 and for complete oxidation of un-burnt hydrocarbons is

Unbreakable crockeries are made from __________ polymers.

Which of the following metals cannot be hot worked at room temperature?

According to thermodynamic Fahrenheit scale, the fundamental interval between ice point to steam point is

Nickel and __________ are the alloying element added in steel to increase its toughness.

Steel balls are manufactured by

Water hammer is caused in steam carrying pipelines, because of

Cast iron contains __________ percent carbon.

Tin based white metals are used, where bearings are subjected to

In fluid flow, and heat and mass transfer, one encounters (i) kinematic velocity (μ), (ii) molecular diffusivity (θ) and thermal diffusivity (α). The units of these quantities are.

__________ flux is used for the extraction of metal from its self fluxing ores.

The following thermocouple may be used for measuring temperature upto 1873°K.

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.

Pick out the wrong statement.

Fine grained steels have

A jig is used while __________ a hole.

For the Stoke's law to be valid in the case of a falling sphere in a fluid, the

The friction factor for the turbulent fluid flow in a rough pipe does not depend upon the

Half life of a radioactive isotope corresponds to the time required for half of the __________ to decay.

The delivery pressure of boiler feed water pump compared to the boiler steam pressure is

Also checkout

In case of a, centrifugal pump, the ratio h₁/h₂ is termed as the __________ efficiency (where, h₁ = actual measured head & h₂ = head imparted to the fluid by impeller).