Friction factor for fluid flow in pipe does not depend upon the

Question

Friction factor for fluid flow in pipe does not depend upon the

A. Pipe length

B. Pipe roughness

C. Fluid density & viscosity

D. Mass flow rate of fluid

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Comment

Cold heading or upsetting is categorised as the __________ process.

A. Extrusion

B. Bending

C. Rolling

D. Forging

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__________ wire is never used for making the heating element.

A. Nichrome

B. Kanthal

C. Invar

D. None of these

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Drossing is a __________ operation.

A. Smelting

B. Dressing

C. Roasting

D. Dressing

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Which of the following fastening devices has its both ends threaded?

A. Bolt

B. Stud

C. Set screw

D. Split nut

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The refrigerant freon-12 is chemically

A. CCl₂F₂

B. CCl₃F

C. CClF₃

D. CCl₄F

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The most serious manufacturing defect from fracture toughness point of view is

A. Surface roughness

B. Pores

C. Spherical inclusion

D. Crack

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One ton of refrigeration is not equivalent to the heat removal rate of

A. 200 BTU/minute

B. 50 kcal/minute

C. 50 kJ/sec

D. 3.5 KW

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Nusselt number is related to the Reynolds number (Re) in turbulent & laminar flow respectively as

A. Re^0.5, Re^0.8

B. Re^0.8, Re^-0.5

C. Re^0.8, Re^0.5

D. Re^-0.8, Re^0.5

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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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The malleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the maximum malleability?

A. Lead

B. Copper

C. Aluminium

D. Wrought iron

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The product (s) of roasting of a sulphide ore is (are)

A. Oxide only

B. Sulphate only

C. Oxide and sulphate

D. Dependent on temperature and partial pressure of oxygen & sulphur dioxide

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Addition of __________ to steel does not help in improving its machinability.

A. Sulphur

B. Silicon

C. Lead

D. Phosphorous

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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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Machinability of hard alloys and tool steels is improved by

A. Spheroidising

B. Annealing

C. Tempering

D. Normalising

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Adhesives

A. Cant be used in the form of pressure sensitive tapes

B. Cant join two dissimilar metals

C. Cure instantaneously after application on a surface

D. None of these

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Carbide tipped cutting tools are manufactured by powder metallurgy techniques and have a composition of

A. 90% tungsten carbide and 10% cobalt

B. 70% aluminium oxide & 30% silica

C. 30% nickel, 15% chromium & 55% tungsten

D. 65% tungsten & 35% zirconium

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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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Coating thickness in case of galvanising of steel sheet generally corresponds to the deposition of __________ gms of zinc per of steel strip.

A. 5-10

B. 1000-1500

C. 120-500

D. 1500-3000

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Which of the following materials has the least scrap value?

A. Aluminium

B. Stainless steel

C. Brass

D. Copper

Discuss this answer

Dielectric

A. Is an electrical insulating material

B. Of low resistivity is preferred

C. Should have high thermal conductivity

D. Need not defy the corrosive action of chemicals

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Filler material used in welding should have __________ as compared to the parent metal to be welded.

A. Lower melting temperature

B. Same melting temperature

C. Same composition

D. Both 'b' & 'c'

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Out of the following, the joint produced by __________ has the lowest strength.

A. Soldering

B. Welding

C. Brazing

D. Riveting

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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

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Eutectic reaction for iron-carbon system occurs at a temperature of __________ °C.

A. 723

B. 959

C. 1147

D. 1493

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Inertial forces are obtained, when the elastic forces are multiplied by __________ number.

A. Mach

B. Froude

C. Reynolds

D. Euler

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Electrostatic separation of minerals from each other is based on their differences in the following property.

A. Densities

B. Magnetic permeabilities

C. Electrical conductivities

D. Hardness

Discuss this answer

Lead pencil contains

A. Graphite

B. Lead sulphide

C. Lead

D. Both (B) & (C)

Discuss this answer

Which of the following metals reacts violently with water?

A. Mercury

B. Sodium

C. Calcium

D. Magnesium

Discuss this answer

The ratio of thermal & electrical conductivity is same for all the metals at the same temperature; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K)

A. T

B. 1/T

C. T²

D. 1/T²

Discuss this answer

Catalyst used in the catalytic converter employed in automobiles to convert CO into CO2 and for complete oxidation of un-burnt hydrocarbons is

A. Nickel

B. Cobalt

C. Vanadium

D. Platinum

Discuss this answer

Accepted Answer

A. Pipe length

Friction factor for fluid flow in pipe does not depend upon the

Correct Answer :

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Related Questions

Cold heading or upsetting is categorised as the __________ process.

__________ wire is never used for making the heating element.

Drossing is a __________ operation.

Which of the following fastening devices has its both ends threaded?

The refrigerant freon-12 is chemically

The most serious manufacturing defect from fracture toughness point of view is

One ton of refrigeration is not equivalent to the heat removal rate of

Nusselt number is related to the Reynolds number (Re) in turbulent & laminar flow respectively as

With increase in temperature, the electrical conductivity of semiconductors

The malleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the maximum malleability?

The product (s) of roasting of a sulphide ore is (are)

Addition of __________ to steel does not help in improving its machinability.

Corona discharge is related to the operation of a/an

Machinability of hard alloys and tool steels is improved by

Adhesives

Carbide tipped cutting tools are manufactured by powder metallurgy techniques and have a composition of

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

Coating thickness in case of galvanising of steel sheet generally corresponds to the deposition of __________ gms of zinc per of steel strip.

Which of the following materials has the least scrap value?

Dielectric

Filler material used in welding should have __________ as compared to the parent metal to be welded.

Out of the following, the joint produced by __________ has the lowest strength.

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

Eutectic reaction for iron-carbon system occurs at a temperature of __________ °C.

Inertial forces are obtained, when the elastic forces are multiplied by __________ number.

Electrostatic separation of minerals from each other is based on their differences in the following property.

Lead pencil contains

Which of the following metals reacts violently with water?

The ratio of thermal & electrical conductivity is same for all the metals at the same temperature; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K)

Catalyst used in the catalytic converter employed in automobiles to convert CO into CO2 and for complete oxidation of un-burnt hydrocarbons is

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