Tempering of a material does not improve its

Question

Tempering of a material does not improve its

A. Machinability

B. Toughness

C. Internal stress level

D. Softness

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Which of the following is the most suitable material of construction for the condenser tubes, where the cooling medium is brine (salty water)?

A. Aluminium

B. Copper

C. Titanium

D. Stainless steel

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Earing is a defect found in steels after the following metal working operation.

A. Extrusion

B. Rolling

C. Deep drawing

D. Wire drawing

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The cooling rate required to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours is __________ BTU/hr.

A. 100

B. 200

C. 1000

D. 2000

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If the demand for an item is trebled and the order cost is reduced to one third, then the economic order quantity

A. Is trebled

B. Remains unchanged

C. Decreases by a factor of 3

D. Decreases by a factor of 1/3

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Lead is poured into the joints between two __________ pipes.

A. Cast iron

B. Steel

C. Concrete

D. Plastic

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Glycerine is used as a coolant in cooling of some engines instead of water, because

A. Its higher boiling point (290°C) increases its heat carrying capacity

B. Comparatively less weight of coolant is required

C. Smaller radiator can be used

D. All a, b & c

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Steel is welded using the __________ flame.

A. Carburising

B. Neutral

C. Oxidising

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

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Pick out the wrong statement.

A. Molecules with symmetrical arrangements (e.g. CH₄ or CCl₄) are non-polar

B. Generally, non-polar compounds are chemically inactive, conduct electricity poorly and do not ionise

C. Most of the hydrocarbons are non-polar

D. None of these

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Aluminium is extracted from

A. Chalcocite

B. Bauxite

C. Galena

D. None of these

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Electrometallurgical methods of metal extraction is normally used for those metals

A. Whose oxide/ore is not reduced by carbon

B. Which fall in the category of alkali & alkaline earth metals

C. Which stands higher in the electrochemical series of the metal

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

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Which of the following is resistant to the action of both heat & chemicals?

A. Borosilicate glass

B. Silica glass

C. Soda lime glass

D. None of these

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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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The pressure outside a bubble/droplet of liquid is __________ the internal pressure.

A. Greater than

B. Less than

C. Equal to

D. Unpredictable; depends on the bubble size

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The property of material, by which a given amount of energy is absorbed by it, without plastic deformation, is called

A. Resilience

B. Toughness

C. Ductility

D. Impact strength

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Magnesium is present in

A. Haemoglobin

B. Chlorophyll

C. Hypo solution

D. None of these

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Water-tube boiler is the one, in which

A. Water passes through tubes and flue gases around it

B. Tube carrying hot flue gases are immersed in a pool of water

C. Tubes are placed in vertical position

D. None of these

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Maraging steels derive their strength from the following mechanism:

A. A fine, highly dislocated and strong martensite

B. Fine dispersions of inter-metallic of Fe, Ni, Ti etc

C. Fine dispersions of alloy carbides in a ferrite matrix

D. Fine dispersions of C nucleated on dislocations in austenite

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Lead pencil contains

A. Graphite

B. Lead sulphide

C. Lead

D. Both (B) & (C)

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Corona discharge is related to the operation of a/an

A. Induction motor

B. Electrostatic precipitator

C. Fast breeder reactor

D. Magneto hydrodynamic generator (MHD)

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Brazing filler metal used for joining steel plates

A. Melts below the melting points of base metals

B. Melts below 300°C

C. Is copper phosphorous alloy

D. Is copper

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The minimum temperature to which the water can be cooled in a cooling tower is the __________ temperature of air.

A. Ambient

B. Dry bulb

C. Dew point

D. Wet bulb

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The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is

A. Full annealing

B. Bright annealing

C. Patenting

D. None of these

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The condition of diffraction from a crystal is given by

A. nλ = 2d Sin θ

B. λ = d Sin 2θ

C. λ = 2d Sin 2θ

D. nλ = d Sin θ

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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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The diffusion co-efficient of Ni in Cu at 1000 K is 1.93 × 10^-16 m²S^-1 and it is 1.94 × 10^-14 m²S^{- 1} at 1200 K. The activation energy (in k. J.mole-1) for the diffusion of Ni in Cu is

A. 130

B. 180

C. 230

D. 250

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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

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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A common disinfectant used in village wells for disinfection of water is

A. Free chlorine

B. Bromine

C. Iodine

D. Potassium permanganate

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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'

Discuss this answer

__________ is not used as a material of construction in thermocouples.

A. Alumel

B. Rhodium

C. Constantan

D. Duralumin

Discuss this answer

Accepted Answer

A. Machinability

Tempering of a material does not improve its

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Which of the following is the most suitable material of construction for the condenser tubes, where the cooling medium is brine (salty water)?

Earing is a defect found in steels after the following metal working operation.

The cooling rate required to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours is __________ BTU/hr.

If the demand for an item is trebled and the order cost is reduced to one third, then the economic order quantity

Lead is poured into the joints between two __________ pipes.

Glycerine is used as a coolant in cooling of some engines instead of water, because

Steel is welded using the __________ flame.

Pick out the wrong statement.

Aluminium is extracted from

Electrometallurgical methods of metal extraction is normally used for those metals

Which of the following is resistant to the action of both heat & chemicals?

Isotropic materials have the same __________ in all directions.

The pressure outside a bubble/droplet of liquid is __________ the internal pressure.

The property of material, by which a given amount of energy is absorbed by it, without plastic deformation, is called

Magnesium is present in

Water-tube boiler is the one, in which

Maraging steels derive their strength from the following mechanism:

Lead pencil contains

Corona discharge is related to the operation of a/an

Brazing filler metal used for joining steel plates

The minimum temperature to which the water can be cooled in a cooling tower is the __________ temperature of air.

The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is

The condition of diffraction from a crystal is given by

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

The diffusion co-efficient of Ni in Cu at 1000 K is 1.93 × 10^-16 m²S^-1 and it is 1.94 × 10^-14 m²S^{- 1} at 1200 K. The activation energy (in k. J.mole-1) for the diffusion of Ni in Cu is

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

Pick out the wrong statement.

A common disinfectant used in village wells for disinfection of water is

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?

__________ is not used as a material of construction in thermocouples.

Also checkout

Tempering of a material does not improve its

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Which of the following is the most suitable material of construction for the condenser tubes, where the cooling medium is brine (salty water)?

Earing is a defect found in steels after the following metal working operation.

The cooling rate required to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours is __________ BTU/hr.

If the demand for an item is trebled and the order cost is reduced to one third, then the economic order quantity

Lead is poured into the joints between two __________ pipes.

Glycerine is used as a coolant in cooling of some engines instead of water, because

Steel is welded using the __________ flame.

Pick out the wrong statement.

Aluminium is extracted from

Electrometallurgical methods of metal extraction is normally used for those metals

Which of the following is resistant to the action of both heat & chemicals?

Isotropic materials have the same __________ in all directions.

The pressure outside a bubble/droplet of liquid is __________ the internal pressure.

The property of material, by which a given amount of energy is absorbed by it, without plastic deformation, is called

Magnesium is present in

Water-tube boiler is the one, in which

Maraging steels derive their strength from the following mechanism:

Lead pencil contains

Corona discharge is related to the operation of a/an

Brazing filler metal used for joining steel plates

The minimum temperature to which the water can be cooled in a cooling tower is the __________ temperature of air.

The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is

The condition of diffraction from a crystal is given by

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

The diffusion co-efficient of Ni in Cu at 1000 K is 1.93 × 10-16 m2S-1 and it is 1.94 × 10-14 m2S- 1 at 1200 K. The activation energy (in k. J.mole-1) for the diffusion of Ni in Cu is

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

Pick out the wrong statement.

A common disinfectant used in village wells for disinfection of water is

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?

__________ is not used as a material of construction in thermocouples.

Also checkout

The diffusion co-efficient of Ni in Cu at 1000 K is 1.93 × 10^-16 m²S^-1 and it is 1.94 × 10^-14 m²S^{- 1} at 1200 K. The activation energy (in k. J.mole-1) for the diffusion of Ni in Cu is