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

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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

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__________ 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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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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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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Wood is a/an __________ material.

A. Amorphous

B. Cellular

C. Homogeneous

D. Granular

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The effect of friction on the flow of steam through a nozzle is to decrease the __________ of steam.

A. Wetness

B. Mass flow rate

C. Both 'a' & 'b'

D. Neither 'a' nor 'b'

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Hot working of lead is carried out at

A. 75°C

B. 373°K

C. 150°C

D. Room temperature

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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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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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Out of the following, the most malleable material is

A. Copper

B. Aluminium

C. Wrought iron

D. Lead

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The ability of tool steel to resist softening at high temperatures is termed as __________ hardness.

A. Red

B. Extended

C. Super

D. Extreme

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One face of a furnace wall is at 1030°C and the other face is exposed to room temperature (30°C). If the thermal conductivity of furnace wall is 3 W. m^{- 1}. k^-1 and the wall thickness is 0.3 m, the maximum heat loss (in W/m) is

A. 100

B. 900

C. 9000

D. 10000

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The most commonly used moderator in nuclear power plants is

A. Graphite

B. Light water

C. Heavy water

D. Beryllium

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Preheating before welding is done to

A. Make the plate softer

B. Burn oil & grease sticking to plate surfaces

C. Avoid plate distortion

D. Prevent cold cracks

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High endurance limit of carburised machine parts is because of the fact that carburisation

A. Suppresses any stress concentration produced in the parts

B. Enhances the yield point of the material

C. Introduces a compressive layer on the surface

D. Produces a better surface finish

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The most important requirement for aluminium industry is the availability of cheap

A. Ore

B. Electrical power

C. Labour

D. Abundant water

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Shrinkage allowance on pattern is provided to compensate for shrinkage when the

A. Metal changes from liquid state to solid state at freezing temperature

B. Solid phase temperature drops from freezing temperature to the room temperature

C. Liquid metal temperature drops from pouring temperature to room temperature

D. Liquid metal temperature drops from pouring temperature to freezing temperature

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Cemented carbide tools are not suitable for cutting

A. Aluminium

B. Brass

C. Cast iron

D. Steel

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Material of construction of foundry crucible is

A. Lead

B. Stainless steel

C. Graphite

D. Cast iron

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Silicon crystal can be converted to p-type semiconductor by doping with

A. Phosphorous

B. Nitrogen

C. Carbon

D. Boron

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Pick out the wrong statement.

A. Ductile fracture of a stressed material, which exhibits a large plastic deformation is commonly caused by the formation and coalescence of voids in the necked region

B. Brittle fracture is caused by the propagation of pre-existing cracks in the material and involves minimum plastic deformation

C. Fatigue fracture of a material is always brittle in nature and takes place due to the existence of line imperfections

D. Brittle materials are generally tested in tension

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The maximum stress below which a material can withstand an infinite number of cycle of stress, is termed as the

A. Fatigue strength

B. Creep strength

C. Resilience

D. Endurance limit

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The 'transition temperature' for ductile to brittle behaviour of steel increases with increase in the __________ content in steel.

A. Carbon

B. Manganese

C. Both 'a' nor 'b'

D. Neither 'a' nor 'b'

Discuss this answer

Which of the following is an example of cathodic protection of metals against corrosion?

A. Painted steel

B. Galvanised iron

C. Case hardened steel

D. Lead lined reactor

Discuss this answer

Carbon supply in pack carburising process is in the form of

A. Charcoal

B. Calcium carbide

C. Hydrocarbon oil

D. Graphite

Discuss this answer

Pick out the correct statement

A. Jet engine can work, where there is no atmosphere

B. Rocket engines cannot work, where there is no atmosphere

C. Rocket engines carry oxygen required for the combustion in the form of oxidiser

D. Jet engines also carry oxidiser

Discuss this answer

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

Discuss this answer

Age hardening is connected with

A. Babbitt metal

B. Gun metal

C. Stainless steel

D. Duralumin

Discuss this answer

The amount of different substances produced, when the same quantity of electricity is passed through different solutions are proportional to their

A. Equivalent weight

B. (Equivalent weight)²

C. Molecular weight

D. (Molecular weight)²

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Which of the following approaches the ideal gas behaviour most closely?

A. Wet steam

B. Saturated steam

C. Superheated steam

D. Saturated water

Discuss this answer

A solid aluminium ball, when quenched in a water bath maintained at 40°C, cools down from 550°C to 450°C in 20 seconds. The expected temperature of the ball after next 20 seconds may be about __________ °C.

A. 370

B. 340

C. 320

D. 300

Discuss this answer

Accepted Answer

B. Increase gradually

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

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

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

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

Propulsion of rocket follows from the

Wood is a/an __________ material.

The effect of friction on the flow of steam through a nozzle is to decrease the __________ of steam.

Hot working of lead is carried out at

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

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

Out of the following, the most malleable material is

The ability of tool steel to resist softening at high temperatures is termed as __________ hardness.

One face of a furnace wall is at 1030°C and the other face is exposed to room temperature (30°C). If the thermal conductivity of furnace wall is 3 W. m^{- 1}. k^-1 and the wall thickness is 0.3 m, the maximum heat loss (in W/m) is

The most commonly used moderator in nuclear power plants is

Preheating before welding is done to

High endurance limit of carburised machine parts is because of the fact that carburisation

The most important requirement for aluminium industry is the availability of cheap

Shrinkage allowance on pattern is provided to compensate for shrinkage when the

Cemented carbide tools are not suitable for cutting

Material of construction of foundry crucible is

Silicon crystal can be converted to p-type semiconductor by doping with

Pick out the wrong statement.

The maximum stress below which a material can withstand an infinite number of cycle of stress, is termed as the

The 'transition temperature' for ductile to brittle behaviour of steel increases with increase in the __________ content in steel.

Which of the following is an example of cathodic protection of metals against corrosion?

Carbon supply in pack carburising process is in the form of

Pick out the correct statement

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

Age hardening is connected with

The amount of different substances produced, when the same quantity of electricity is passed through different solutions are proportional to their

Which of the following approaches the ideal gas behaviour most closely?

A solid aluminium ball, when quenched in a water bath maintained at 40°C, cools down from 550°C to 450°C in 20 seconds. The expected temperature of the ball after next 20 seconds may be about __________ °C.

Also checkout

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

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

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

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

Propulsion of rocket follows from the

Wood is a/an __________ material.

The effect of friction on the flow of steam through a nozzle is to decrease the __________ of steam.

Hot working of lead is carried out at

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

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

Out of the following, the most malleable material is

The ability of tool steel to resist softening at high temperatures is termed as __________ hardness.

One face of a furnace wall is at 1030°C and the other face is exposed to room temperature (30°C). If the thermal conductivity of furnace wall is 3 W. m- 1. k-1 and the wall thickness is 0.3 m, the maximum heat loss (in W/m) is

The most commonly used moderator in nuclear power plants is

Preheating before welding is done to

High endurance limit of carburised machine parts is because of the fact that carburisation

The most important requirement for aluminium industry is the availability of cheap

Shrinkage allowance on pattern is provided to compensate for shrinkage when the

Cemented carbide tools are not suitable for cutting

Material of construction of foundry crucible is

Silicon crystal can be converted to p-type semiconductor by doping with

Pick out the wrong statement.

The maximum stress below which a material can withstand an infinite number of cycle of stress, is termed as the

The 'transition temperature' for ductile to brittle behaviour of steel increases with increase in the __________ content in steel.

Which of the following is an example of cathodic protection of metals against corrosion?

Carbon supply in pack carburising process is in the form of

Pick out the correct statement

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

Age hardening is connected with

The amount of different substances produced, when the same quantity of electricity is passed through different solutions are proportional to their

Which of the following approaches the ideal gas behaviour most closely?

A solid aluminium ball, when quenched in a water bath maintained at 40°C, cools down from 550°C to 450°C in 20 seconds. The expected temperature of the ball after next 20 seconds may be about __________ °C.

Also checkout

One face of a furnace wall is at 1030°C and the other face is exposed to room temperature (30°C). If the thermal conductivity of furnace wall is 3 W. m^{- 1}. k^-1 and the wall thickness is 0.3 m, the maximum heat loss (in W/m) is