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Current Affairs January 2024

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Removal of non-condensable from steam or other vapour is termed as the __________ process.

A. Condensation

B. Deaeration

C. Scavenging

D. Exhaust

Correct Answer :

B. Deaeration


Related Questions

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The critical pressure at which the latent heat of vaporisation of steam becomes zero is __________ Kg/cm2.

A. 273.15

B. 225.65

C. 100.03

D. 373.15

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4

The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as

A. Rigid

B. Tough

C. Ductile

D. Plastic

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In the Bayer's process, bauxite is digested under pressure using

A. H2SO4

B. NaOH

C. NH3

D. HCl

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Melting point & boiling points of liquid oxygen are respectively - 218.8°C & - 183°C, while the same for liquid nitrogen is - 210°C & - 195.8°C respectively. The difference in melting points of liquid oxygen & liquid nitrogen is not equal to 8.8

A. °C

B. °F

C. °K

D. °R

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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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Fire in fuel gas pipelines is extinguished most effectively by

A. Spraying water

B. Blanketting the area with nitrogen atmosphere

C. Fire fighting foam

D. None of these

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4

Which of the following properties of a solid is not dependent on crystal imperfection?

A. Ductility

B. Semi-conductivity

C. Melting point

D. Yield stress

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4

In connection with corrosion of metals, passivation is the process that

A. Intensifies deterioration

B. Changes the composition of the metal

C. Inhibits further deterioration

D. None of these

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4

Which of the following is the correct nature of shear stress distribution along the cross section in a horizontal circular pipe under steady state fluid flow condition?

A.

B.

C.

D.

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Circular cross section machine parts which are symmetrical about the axis of rotation are made by hot

A. Piercing

B. Spinning

C. Drawing

D. Extrusion

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The most abundant metal present in the earth's crust is;

A. Iron

B. Copper

C. Titanium

D. Aluminium

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For an ideal gas, Cp - Cv is

A. R

B. -R

C. 0

D. (3/2) R

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The thermodynamic law, = constant, is not followed by the

A. Free expansion of an ideal gas

B. Adiabatic expansion of steam in turbine

C. Adiabatic compression of air

D. Ideal compression of air

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4

The excess air required for the combustion of pulverised coal is of the order of about __________ percent.

A. 5

B. 15

C. 30

D. 45

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Carnot cycle is also termed as the constant __________ cycle in thermodynamics.

A. Entropy

B. Pressure

C. Volume

D. Heat

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__________ is the process of coating the surface of steel with aluminium oxide, thereby imparting it increased resistance to corrosion & oxidation upto a temperature of 700°C.

A. Veneering

B. Galvanising

C. Electroplating

D. Calorising

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4

Pipelines carrying various utilities in chemical industries are identified by their colour codes. The color of pipeline carrying steam is

A. Black

B. Silver grey

C. Green

D. Yellow

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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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A spring material should have low

A. Elastic limit

B. Deflection value

C. Fatigue resistance

D. None of these

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4

'GASOHOL' widely used in Brazil as a motor fuel is a mixture of alcohol and

A. Petrol

B. LPG

C. Light hydrocarbon gases (e.g. butane or propane)

D. None of these

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4

Ferromagnetic materials owe their properties to __________ inner sub-shells.

A. Completely filled

B. Partially filled

C. Equally filled

D. Vacant

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Projection welding & stud welding is categorised as the __________ welding.

A. Pressure

B. Thermit

C. Resistance

D. Arc

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Gas turbine normally employs a constant __________ cycle.

A. Pressure

B. Temperature

C. Volume

D. None of these

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4

Diameter of the rivet to be provided on a 20 mm. thick boiler plate will be __________ mm.

A. 10

B. 20

C. 30

D. 40

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The type of pump used for lifting large quantity of sewage is a __________ pump.

A. Gear

B. Centrifugal

C. Reciprocating

D. Plunger

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4

Atomic __________ is a whole number for an element.

A. Number

B. Weight

C. Radius

D. None of these

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Which of the following metals reacts violently with water?

A. Mercury

B. Sodium

C. Calcium

D. Magnesium

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4

Heat flow across a hollow sphere of inner radius 'r1' and outer radius 'r2' is directly proportional to

A. (r2 - r1)/r1. r2

B. r1. r2/(r2 - r1)

C. (r2 + r1)/r1. r2

D. r1. r2/(r2 + r1)

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4

Broaching tools are usually made of

A. Cermets

B. High speed steel

C. Tungsten carbide

D. Stellite

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Transformer cores are normally made from

A. Soft ferrites

B. High purity iron

C. Grain oriented Fe-Si alloy

D. Al-Ni-Co alloy