Home
Current Affairs January 2024

What is the correct answer?

4

Hooke's law

A. Applies to elastic deformation

B. Applies beyond limit of proportionality in stress-strain curve

C. States that stress is inversely proportional to strain upto elastic limit

D. None of these

Correct Answer :

A. Applies to elastic deformation


Related Questions

What is the correct answer?

4

Pick out the correct statement about the condensation.

A. Filmwise condensation gives a lower heat transfer rate than the dropwise condensation

B. Suitable coating or vapour additive is used to promote film wise condensation

C. If a condensing liquid does not wet the surface dropwise, even then condensation will take place on it

D. Reynolds number of condensing liquid is based on its mass flow rate

What is the correct answer?

4

Presence of nickel & chromium in steel does not raise its

A. Elastic limit

B. Machining properties

C. Ductility

D. Resilience

What is the correct answer?

4

Softening of hardened steel is done by its

A. Normalising

B. Tempering

C. Annealing

D. Carburising

What is the correct answer?

4

__________ is the process used for setting up compressive stresses in the surface of a metal to improve its fatigue strength.

A. Lancing

B. Shot peening

C. Slugging

D. Spinning

What is the correct answer?

4

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

What is the correct answer?

4

Velocity of a gas in sound is not proportional to (where, T = Absolute temperature of the gas. P = Absolute pressure of the gas. y = Ratio of specific heats (Cp/Cv) ρ = specific weight of the gas)

A. √T

B. 1/√P

C. √y

D. 1/√ρ

What is the correct answer?

4

Induced draft fans provided in large thermal power plant boilers have __________ blades.

A. Forward curved

B. Backward curved

C. Double curved

D. Radial or straight

What is the correct answer?

4

Wrought iron does not have

A. Uniform strength in all directions

B. Ability to hold protective coating

C. High ductility & corrosion resistance

D. Easily weldable characteristics

What is the correct answer?

4

Alloys having more than 80% copper are generally more

A. Abrasion resistant

B. Corrosion resistant

C. Prone to season cracking

D. Machinable

What is the correct answer?

4

Surface tension of a liquid

A. Is due to intermolecular forces of cohesion

B. Decreases with rise in temperature

C. Is responsible for the spherical shape of an isolated liquid drop

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

What is the correct answer?

4

Working of linear variable differential transducer (LVDT) is based on the principle of variable

A. Capacitance

B. Resistance

C. Mutual inductance

D. None of these

What is the correct answer?

4

Multistage compression of air as compared to single stage compression offers the advantage of

A. Power saving per unit weight of air delivered

B. Moisture elimination in the inter-stage cooler

C. Increased volumetric efficiency

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

What is the correct answer?

4

Galvanic corrosion cannot be prevented by

A. Cathodic protection

B. Anodic protection

C. Usage of largest possible anodic area

D. Any one of these

What is the correct answer?

4

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

What is the correct answer?

4

Glass reacts with

A. H2SO3

B. HF

C. HNO3

D. K2Cr2O7

What is the correct answer?

4

Out of the following, the best material capable of withstanding shock & vibration without the danger of cracking is

A. Malleable iron

B. Grey cast iron

C. Chilled cast iron

D. White cast iron

What is the correct answer?

4

The only suitable method for hardening the low carbon steel is case hardening. Which of the following is a case hardening process?

A. Cyaniding

B. Sherardizing

C. Spheroidising

D. None of these

What is the correct answer?

4

Iron content in Indian iron ore is about __________ percent.

A. 80-85

B. 60-65

C. 40-45

D. 20-25

What is the correct answer?

4

Maximum consumption of limestone is in the __________ industry.

A. Iron and steel

B. Cement

C. Glass

D. Fertiliser

What is the correct answer?

4

Plastics as a material of construction suffer from the drawback of low

A. Machinability

B. Density

C. Strength

D. Plastic deformation

What is the correct answer?

4

In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is __________ °C.

A. 20

B. 60

C. 120

D.

What is the correct answer?

4

Which of the following test is used for distinguishing among dry oils, semi-drying oils and non drying oils?

A. Elaiden test

B. Reichert-Meissl value test

C. Hunter value test

D. Iodine value test

What is the correct answer?

4

Metallic surveying tapes are made of __________ which has a low co-efficient of expansion & enough strength.

A. Invar

B. Hastelloy

C. Duralumin

D. Monel metal

What is the correct answer?

4

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

What is the correct answer?

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

What is the correct answer?

4

Oxyacetylene reducing flame is used while carrying out welding on

A. Alloy steel

B. Grey cast iron

C. Mild steel

D. High carbon steel

What is the correct answer?

4

With increase in annealing temperature, the following defect density decreases.

A. Vacancy

B. Dislocation

C. Grain boundary

D. All of these

What is the correct answer?

4

The most suitable material of construction for a sewer to carry sewage under high pressure is

A. Asbestos cement

B. Steel

C. Cement concrete

D. Stoneware

What is the correct answer?

4

Cupola produces __________ iron.

A. Pig

B. Cast

C. Wrought

D. Carbon free

What is the correct answer?

4

The thickness of oxide film is y at time t. If are the temperature dependent constants, the parabolic law of oxidation is given by

A.

B.

C.

D.