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

Question

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

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Two solutions A1 & A2 have pH value of 2 & 6 respectively. It implies that the solution

A. A₁ is more alkaline than solution A₂

B. A₁ is highly acidic

C. A₂ is very slightly acidic

D. Both (B) & (C)

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Materials having resistivity ranging from 1 to 100 ohm. cm is termed as

A. Conductor

B. Insulator

C. Semi-conductor

D. None of these

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Change in volume of metals from absolute zero temperature to their melting points is

A. Almost same for all metals

B. Different for different metals

C. Less for low melting point metals

D. Less for high melting point metals

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The noble metals

A. Are exemplified by Na, K and Li

B. Do not resist corrosion very strongly

C. Are the lowermost in the electro-chemical series of metals

D. None of these

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Which of the following is not the commercial name of poly-methyl-methacrylate (PMMA)?

A. Styrofoam

B. Lucite

C. Perspex

D. Plexiglass

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The Al₂O₃ content of cryolite in Hall- Heroult cell is maintained between __________ percent.

A. 2-5

B. 18-20

C. 12-15

D. 6-12

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The pressure drop per unit length for laminar flow of fluid through a long pipe is proportional to (where, A = cross-sectional area of the pipe & D = Diameter of the pipe)

A. A

B. D

C. 1/A

D. 1/A²

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Stresses encountered in the metal forming processes are less than the __________ of the material.

A. Fracture strength

B. Yield strength

C. Elastic limit

D. Limit of proportionality

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Energy of the sun arises mainly from __________ reactions.

A. Fusion

B. Fission

C. Combustion

D. None of these

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Main constituent of bone ash is

A. Ammonium phosphate

B. Calcium phosphate

C. Animal charcoal

D. Ammonium sulphate

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Which of the following metals is not subjected to electrolytic refining/purification?

A. Copper

B. Zinc

C. Tin

D. Aluminium

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For a thermodynamic system undergoing a process, which of the following pairs best expresses the relationship similar to that expressed by the pressure volume plot?

A. Temperature - entropy

B. Temperature - pressure

C. Enthalpy - entropy

D. Enthalpy-pressure

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Machinability of hard alloys and tool steels is improved by

A. Spheroidising

B. Annealing

C. Tempering

D. Normalising

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In TIG welding, thoriated tungsten electrodes are used, because it

A. Has higher current carrying capacity

B. Has better electron emissivity

C. Is stronger than ordinary tungsten

D. Is easy to prepare

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Ganister contains maximum percentage of

A. FeO

B. SiO2

C. MgO

D. MnO2

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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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Co-efficient of performance of a Carnot cycle refrigerator operating between - 23°C and + 27°C is

A. 3

B. 5

C. 0.5

D. 1.5

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In case of water (Prandtl number ≈ 6) flowing over a flat plate heated over the entire length, the thermal boundary layer thickness as compared to hydrodynamic boundary layer thickness is

A. Less

B. More

C. Equal

D. Unpredictable

Discuss this answer

The burnout heat flux in the nucleate boiling regime is not a function of the

A. Liquid density

B. Vapour density

C. Temperature difference

D. Heat of evaporation

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On being hit with a hammer, __________ will readily fracture.

A. Brass

B. Mild steel

C. Cast iron

D. Lead

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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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In condensers used in thermal power plants, steam is normally used in shell side and cooling water on the tube side, because of the reason that

A. Compared to the mass flow rate of cooling water, the rate of condensation of steam is invariably smaller

B. Maintaining vacuum on tube side is more difficult than that on the shell side

C. Water velocity can be increased conveniently to increase the overall heat transfer co-efficient because of its lower specific volume compared to steam

D. Condenser can act as a storage unit for condensed steam

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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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Copper deposits are found in India at the following location:

A. Kudremukh

B. Kolar

C. Khetri

D. Ramagundam

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__________ is the trade name assigned to a nonferrous cast alloy composed of cobalt, chromium & tungsten.

A. Stellite

B. High speed steel

C. Cermet

D. Alnico

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Steel produced from phosphatic iron is __________ in nature.

A. Malleable

B. Ductile

C. Brittle

D. Tough

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Case hardening is not done by

A. Nitriding

B. Hot dipping

C. Electroplating

D. Both b & c

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Air/fuel ratio by weight for combustion of methane with theoretical quantity of air will be about

A. 9 : 1

B. 17 : 1

C. 23 : 1

D. 29 : 1

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High speed steel tools retain their hardness upto a temperature of __________ °C.

A. 500

B. 750

C. 900

D. 1100

Discuss this answer

Normalising does not __________ of a metal.

A. Improve machinability & tensile strength

B. Remove internal stresses

C. Refine the structure

D. Remove strains caused by cold working

Discuss this answer

Accepted Answer

C. Kinetic energy loss

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

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Two solutions A1 & A2 have pH value of 2 & 6 respectively. It implies that the solution

Materials having resistivity ranging from 1 to 100 ohm. cm is termed as

Change in volume of metals from absolute zero temperature to their melting points is

The noble metals

Which of the following is not the commercial name of poly-methyl-methacrylate (PMMA)?

The Al₂O₃ content of cryolite in Hall- Heroult cell is maintained between __________ percent.

The pressure drop per unit length for laminar flow of fluid through a long pipe is proportional to (where, A = cross-sectional area of the pipe & D = Diameter of the pipe)

Stresses encountered in the metal forming processes are less than the __________ of the material.

Energy of the sun arises mainly from __________ reactions.

Main constituent of bone ash is

Which of the following metals is not subjected to electrolytic refining/purification?

For a thermodynamic system undergoing a process, which of the following pairs best expresses the relationship similar to that expressed by the pressure volume plot?

Machinability of hard alloys and tool steels is improved by

In TIG welding, thoriated tungsten electrodes are used, because it

Ganister contains maximum percentage of

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

Co-efficient of performance of a Carnot cycle refrigerator operating between - 23°C and + 27°C is

In case of water (Prandtl number ≈ 6) flowing over a flat plate heated over the entire length, the thermal boundary layer thickness as compared to hydrodynamic boundary layer thickness is

The burnout heat flux in the nucleate boiling regime is not a function of the

On being hit with a hammer, __________ will readily fracture.

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

In condensers used in thermal power plants, steam is normally used in shell side and cooling water on the tube side, because of the reason that

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

Copper deposits are found in India at the following location:

__________ is the trade name assigned to a nonferrous cast alloy composed of cobalt, chromium & tungsten.

Steel produced from phosphatic iron is __________ in nature.

Case hardening is not done by

Air/fuel ratio by weight for combustion of methane with theoretical quantity of air will be about

High speed steel tools retain their hardness upto a temperature of __________ °C.

Normalising does not __________ of a metal.

Also checkout

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

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Two solutions A1 & A2 have pH value of 2 & 6 respectively. It implies that the solution

Materials having resistivity ranging from 1 to 100 ohm. cm is termed as

Change in volume of metals from absolute zero temperature to their melting points is

The noble metals

Which of the following is not the commercial name of poly-methyl-methacrylate (PMMA)?

The Al2O3 content of cryolite in Hall- Heroult cell is maintained between __________ percent.

The pressure drop per unit length for laminar flow of fluid through a long pipe is proportional to (where, A = cross-sectional area of the pipe & D = Diameter of the pipe)

Stresses encountered in the metal forming processes are less than the __________ of the material.

Energy of the sun arises mainly from __________ reactions.

Main constituent of bone ash is

Which of the following metals is not subjected to electrolytic refining/purification?

For a thermodynamic system undergoing a process, which of the following pairs best expresses the relationship similar to that expressed by the pressure volume plot?

Machinability of hard alloys and tool steels is improved by

In TIG welding, thoriated tungsten electrodes are used, because it

Ganister contains maximum percentage of

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

Co-efficient of performance of a Carnot cycle refrigerator operating between - 23°C and + 27°C is

In case of water (Prandtl number ≈ 6) flowing over a flat plate heated over the entire length, the thermal boundary layer thickness as compared to hydrodynamic boundary layer thickness is

The burnout heat flux in the nucleate boiling regime is not a function of the

On being hit with a hammer, __________ will readily fracture.

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

In condensers used in thermal power plants, steam is normally used in shell side and cooling water on the tube side, because of the reason that

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

Copper deposits are found in India at the following location:

__________ is the trade name assigned to a nonferrous cast alloy composed of cobalt, chromium & tungsten.

Steel produced from phosphatic iron is __________ in nature.

Case hardening is not done by

Air/fuel ratio by weight for combustion of methane with theoretical quantity of air will be about

High speed steel tools retain their hardness upto a temperature of __________ °C.

Normalising does not __________ of a metal.

Also checkout

The Al₂O₃ content of cryolite in Hall- Heroult cell is maintained between __________ percent.