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.

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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

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For a small scale toy factory, the fixed cost per month is Rs. 5000/-. The variable cost per toy is Rs. 20 and sales price is Rs. 30 per toy. The break even production per month will be __________ toys.

A. 250

B. 500

C. 1000

D. 3000

Discuss this answer

Softening of hardened steel is done by its

A. Normalising

B. Tempering

C. Annealing

D. Carburising

Discuss this answer

Cast iron contains __________ percent carbon.

A. 2.5

B. 3.75

C. 4.75

D. 5.25

Discuss this answer

A solution which resists change in its pH value on addition of acid/alkali is called the __________ solution.

A. Neutral

B. Ideal

C. Buffer

D. Zero pH

Discuss this answer

While the bin cards are used in the effective stores management, the queuing theory is associated with the __________ time.

A. Waiting

B. Idle

C. Inspection

D. Tool replacement

Discuss this answer

Liquid nitrogen containers can be made from

A. Ferritic stainless steel

B. HSLA steel

C. Titanium

D. Austenitic stainless steel

Discuss this answer

Spherical shape of mercury droplets is due to its

A. High viscosity

B. Low surface tension

C. High density

D. High surface tension

Discuss this answer

Which of the following can be manufactured using powder metallurgy techniques?

A. Brake linings

B. Bearings

C. Carbide tool tips

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

Discuss this answer

Elimination of brittleness resulting from welding of saw blades is done by __________ of the welded portion.

A. Annealing

B. Toughening

C. Work hardening

D. Tempering

Discuss this answer

Fog is an example of colloidal system of

A. Solid dispersed in gas

B. Solid dispersed in liquid

C. Liquid dispersed in gas

D. Gas dispersed in liquid

Discuss this answer

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

A. Burning

B. Intensive oxidation

C. Evaporation

D. None of these

Discuss this answer

A fire tube boiler is limited to a maximum steam pressure of about __________ kg/cm².

A. 6

B. 18

C. 38

D. 52

Discuss this answer

The value of for air & most common gases can be safely assumed to be

A. 0.8

B. 1

C. 1.4

D. 1.8

Discuss this answer

Good design of the casing of a centrifugal pump aims at minimising the

A. Cavitation

B. Frictional losses

C. Kinetic energy loss

D. Static head

Discuss this answer

Use of economiser in a boiler plant reduces the fuel consumption for steam generation by about __________ percent.

A. 1

B. 10

C. 30

D. 50

Discuss this answer

Which of the following processes follows the hardening process for reducing the hardening strains & increasing the toughness of the steel part?

A. Anodising

B. Tempering

C. Carburising

D. Annealing

Discuss this answer

Out of the following __________ iron has the best capability to bear sudden & excessive shocks.

A. White

B. Cast

C. Wrought

D. Pig

Discuss this answer

The cathode in an electrochemical cell always carries

A. Negative charge

B. Positive charge

C. Zero charge

D. Positive or negative charge depending upon the nature of the cell

Discuss this answer

For preparation of porous bearings by powder metallurgy, preferred particle shape is

A. Spherical

B. Nodular

C. Irregular

D. No preferred shape

Discuss this answer

Unit of viscosity in CGS system is

A.

B.

C.

D.

Discuss this answer

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'

Discuss this answer

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

Discuss this answer

__________ is the hardest oxide and is hence used where high wear resistance at high temperature is required.

A. Beryllium

B. Zirconia

C. Alumina

D. Magnesia

Discuss this answer

Chromium molybdenum steel cannot be welded using __________ welding.

A. Thermit

B. Electrical resistance

C. Oxy-acetylene

D. Any of these

Discuss this answer

Hollow shafts can be made as strong as solid shafts by making the twisting moments of both the shafts same. Shafts made by __________ have residual stresses.

A. Forging

B. Cold rolling

C. Hot rolling

D. Casting

Discuss this answer

Spark plug is provided in a/an

A. Engine having carburettor

B. Diesel engine

C. Compression ignition engine

D. Both (B) & (C)

Discuss this answer

In connection with corrosion of metals, passivation is the process that

A. Intensifies deterioration

B. Changes the composition of the metal

C. Inhibits further deterioration

D. None of these

Discuss this answer

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

Discuss this answer

In a boundary layer developed along the flow, the pressure decreases in the downstream direction. The boundary layer thickness in this case will

A. Decrease gradually

B. Increase gradually

C. Increase rapidly

D. Remain constant

Discuss this answer

__________ is the process of coating the surface of steel with aluminium oxide, thereby imparting it increased resistance to corrosion & oxidation upto a temperature of 700°C.

A. Veneering

B. Galvanising

C. Electroplating

D. Calorising

Discuss this answer

Accepted Answer

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

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.

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

For a small scale toy factory, the fixed cost per month is Rs. 5000/-. The variable cost per toy is Rs. 20 and sales price is Rs. 30 per toy. The break even production per month will be __________ toys.

Softening of hardened steel is done by its

Cast iron contains __________ percent carbon.

A solution which resists change in its pH value on addition of acid/alkali is called the __________ solution.

While the bin cards are used in the effective stores management, the queuing theory is associated with the __________ time.

Liquid nitrogen containers can be made from

Spherical shape of mercury droplets is due to its

Which of the following can be manufactured using powder metallurgy techniques?

Elimination of brittleness resulting from welding of saw blades is done by __________ of the welded portion.

Fog is an example of colloidal system of

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

A fire tube boiler is limited to a maximum steam pressure of about __________ kg/cm².

The value of for air & most common gases can be safely assumed to be

Good design of the casing of a centrifugal pump aims at minimising the

Use of economiser in a boiler plant reduces the fuel consumption for steam generation by about __________ percent.

Which of the following processes follows the hardening process for reducing the hardening strains & increasing the toughness of the steel part?

Out of the following __________ iron has the best capability to bear sudden & excessive shocks.

The cathode in an electrochemical cell always carries

For preparation of porous bearings by powder metallurgy, preferred particle shape is

Unit of viscosity in CGS system is

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

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).

__________ is the hardest oxide and is hence used where high wear resistance at high temperature is required.

Chromium molybdenum steel cannot be welded using __________ welding.

Hollow shafts can be made as strong as solid shafts by making the twisting moments of both the shafts same. Shafts made by __________ have residual stresses.

Spark plug is provided in a/an

In connection with corrosion of metals, passivation is the process that

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

In a boundary layer developed along the flow, the pressure decreases in the downstream direction. The boundary layer thickness in this case will

__________ is the process of coating the surface of steel with aluminium oxide, thereby imparting it increased resistance to corrosion & oxidation upto a temperature of 700°C.

Also checkout

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.

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

For a small scale toy factory, the fixed cost per month is Rs. 5000/-. The variable cost per toy is Rs. 20 and sales price is Rs. 30 per toy. The break even production per month will be __________ toys.

Softening of hardened steel is done by its

Cast iron contains __________ percent carbon.

A solution which resists change in its pH value on addition of acid/alkali is called the __________ solution.

While the bin cards are used in the effective stores management, the queuing theory is associated with the __________ time.

Liquid nitrogen containers can be made from

Spherical shape of mercury droplets is due to its

Which of the following can be manufactured using powder metallurgy techniques?

Elimination of brittleness resulting from welding of saw blades is done by __________ of the welded portion.

Fog is an example of colloidal system of

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

A fire tube boiler is limited to a maximum steam pressure of about __________ kg/cm2.

The value of for air & most common gases can be safely assumed to be

Good design of the casing of a centrifugal pump aims at minimising the

Use of economiser in a boiler plant reduces the fuel consumption for steam generation by about __________ percent.

Which of the following processes follows the hardening process for reducing the hardening strains & increasing the toughness of the steel part?

Out of the following __________ iron has the best capability to bear sudden & excessive shocks.

The cathode in an electrochemical cell always carries

For preparation of porous bearings by powder metallurgy, preferred particle shape is

Unit of viscosity in CGS system is

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

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).

__________ is the hardest oxide and is hence used where high wear resistance at high temperature is required.

Chromium molybdenum steel cannot be welded using __________ welding.

Hollow shafts can be made as strong as solid shafts by making the twisting moments of both the shafts same. Shafts made by __________ have residual stresses.

Spark plug is provided in a/an

In connection with corrosion of metals, passivation is the process that

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

In a boundary layer developed along the flow, the pressure decreases in the downstream direction. The boundary layer thickness in this case will

__________ is the process of coating the surface of steel with aluminium oxide, thereby imparting it increased resistance to corrosion & oxidation upto a temperature of 700°C.

Also checkout

A fire tube boiler is limited to a maximum steam pressure of about __________ kg/cm².

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).