Boiler draught of 10 mm water column is equivalent to

Question

Boiler draught of 10 mm water column is equivalent to

A. 1 kgf/m²

B. 10 kgf/m²

C. 10 kgf/mm²

D. 1 kgf/mm²

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A steam carrying pipeline is insulated with two layers of insulating materials with the inferior insulation material forming the inner part. If the two insulating layers are interchanged, the heat conducted will

A. Increase

B. Decrease

C. Remain unaffected

D. May increase or decrease; depends on the thickness of each layer

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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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Electrometallurgy is not involved in the extraction of __________ from its ore.

A. Aluminium

B. Tin

C. Lead

D. Both (B) & (C)

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The activity co-efficient of the solute in a dilute solution

A. Decreases with the increase of concentration of the solute

B. Increases with the increase of concentration of the solute

C. Remains constant

D. Is unity at infinite dilution

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With increase in __________ Knocking tendency in a spark ignition petrol engine decreases.

A. Supercharging

B. Wall temperature

C. Compression ratio

D. Engine speed

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Which of the following is an ore dressing operation?

A. Classification

B. Smelting

C. Roasting

D. None of these

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Batch process is preferred over continuous process, when the

A. Product yields and quality cannot be achieved in continuous process, because of long residence time

B. Sales demand of product is not steady

C. Same equipment cannot be used for several processes of the same nature

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

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Square steel key is normally strong in failure by shear & crushing. Keys are normally made of __________ steel bars.

A. Hot rolled mild

B. Cold rolled mild

C. Forged

D. Machinable stainless

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The process of removal of scale formed during hot rolling of steel is termed as

A. Descaling

B. Shot blasting

C. Pickling

D. Skimming

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With increase in temperature, the electrical conductivity of semiconductors

A. Increases

B. Decreases

C. Remain constant

D. Either (A) or (B), depends on the type of semi-conductor

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In electrical resistance welding, distortion results from the use of improper

A. Clamping methods

B. Electrodes

C. Current

D. Filler material

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__________ can replace tungsten in high speed steel.

A. Chromium

B. Vanadium

C. Cobalt

D. Molybdenum

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The main constituent of bones is

A. CaF₂

B. Ca₃(PO₄)₂

C. CaCO₃

D. CaCl₂

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In practice, the compression ratio of compression-ignition (CI) engine ranges from

A. 15 to 25

B. 5 to 10

C. 40 to 55

D. 60 to 70

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Vernier calipers cannot be used to measure the

A. I.D. & O.D. of the shaft

B. Thickness of parts

C. Depth of holes

D. Clearance between two mating surfaces

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

A. Spherical

B. Nodular

C. Irregular

D. No preferred shape

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Basic open hearth furnace (BOF) is not used for producing __________ steel.

A. Killed

B. Rimming

C. High alloy

D. None of these

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While the oxy-acetylene flame produces a temperature of 3200°C, the temperature produced by oxy-hydrogen flame is about __________ °C.

A. 1800

B. 2000

C. 2400

D. 3000

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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

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The order of a chemical reaction

A. Can be determined only experimentally

B. Can be determined from the stoichiometry of the reaction

C. Cannot be zero

D. Can be fractional

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The most important consideration in value engineering is the

A. Profit maximisation

B. Customer satisfaction

C. Cost reduction

D. Process improvement

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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 is not an explosive?

A. TNT

B. CMC

C. RDX

D. Lead azide

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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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Isotropic materials have the same __________ in all directions.

A. Induced stresses

B. Density

C. Elastic properties

D. Thermal properties

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__________ of air does not increase with increase in temperature.

A. Density

B. Thermal diffusivity

C. Viscosity

D. Thermal conductivity

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Unbreakable crockeries are made from __________ polymers.

A. Polystyrene

B. Melamine

C. Polystyrene

D. Polyurethane

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Nusselt number is related to Grashoff number (Gr) in turbulent & laminar flow respectively, in respect of free convection over a vertical flat plate as

A. Gr^0.25, Gr

B. Gr^0.25, Gr^0.33

C. Gr, Gr^0.25

D. Gr^0.33, Gr^0.25

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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

Discuss this answer

Accepted Answer

B. 10 kgf/m²

Boiler draught of 10 mm water column is equivalent to

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

A steam carrying pipeline is insulated with two layers of insulating materials with the inferior insulation material forming the inner part. If the two insulating layers are interchanged, the heat conducted will

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%?

Electrometallurgy is not involved in the extraction of __________ from its ore.

The activity co-efficient of the solute in a dilute solution

With increase in __________ Knocking tendency in a spark ignition petrol engine decreases.

Which of the following is an ore dressing operation?

Batch process is preferred over continuous process, when the

Square steel key is normally strong in failure by shear & crushing. Keys are normally made of __________ steel bars.

The process of removal of scale formed during hot rolling of steel is termed as

With increase in temperature, the electrical conductivity of semiconductors

In electrical resistance welding, distortion results from the use of improper

__________ can replace tungsten in high speed steel.

The main constituent of bones is

In practice, the compression ratio of compression-ignition (CI) engine ranges from

Vernier calipers cannot be used to measure the

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

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

Basic open hearth furnace (BOF) is not used for producing __________ steel.

While the oxy-acetylene flame produces a temperature of 3200°C, the temperature produced by oxy-hydrogen flame is about __________ °C.

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

The order of a chemical reaction

The most important consideration in value engineering is the

Which of the following is the largest quantum of pressure?

Which of the following is not an explosive?

Coarse grained steels have

Isotropic materials have the same __________ in all directions.

__________ of air does not increase with increase in temperature.

Unbreakable crockeries are made from __________ polymers.

Nusselt number is related to Grashoff number (Gr) in turbulent & laminar flow respectively, in respect of free convection over a vertical flat plate as

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?

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