Home
Current Affairs January 2024

What is the correct answer?

4

Out of the following, maximum temperature drop for a given heat flow & for the same thickness will be in the case of

A. Steel

B. Glass wood

C. Copper

D. Fireclay bricks

Correct Answer :

B. Glass wood


Related Questions

What is the correct answer?

4

Maximum hardenability of steel depends upon its

A. Chemical composition

B. Carbon content

C. Grain size

D. Alloying elements content

What is the correct answer?

4

An ideal material for making cooking vessels should have

A. High heat capacity

B. Low heat capacity

C. High thermal conductivity

D. Both (B) and (C)

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

Which of the following has the highest value of refractive index?

A. Brine (sea water)

B. Diamond

C. Distilled water

D. Glass

What is the correct answer?

4

Non-ferrous alloys used for making cutting tools need not have high

A. Abrasion resistance

B. Toughness

C. Red hardness

D. Cutting speed

What is the correct answer?

4

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

A. Clamping methods

B. Electrodes

C. Current

D. Filler material

What is the correct answer?

4

According to maximum shear stress failure criterion, yielding in material occurs, when the maximum shear stress is equal to __________ times the yield stress.

A. 0.5

B. 2

C. √2

D. √3/2

What is the correct answer?

4

The main reducing agent in iron blast furnace is

A. Carbon dioxide

B. Carbon monoxide

C. Oxygen

D. Air

What is the correct answer?

4

As per the Indian boiler regulation (IBR), the type of joint preferred for the circumferential joint is the __________ joint.

A. Butt

B. Lap

C. Welded

D. None of these

What is the correct answer?

4

Powder metallurgy process does not make metal powder by

A. Atomisation

B. Grinding/milling

C. Hammering

D. Electrolytic deposition

What is the correct answer?

4

Moist air is cooled along the line of constant __________ , when it is passed over a cold & dry cooling coil, such that no condensation occurs?

A. Enthalpy

B. Relative humidity

C. Wet bulb temperature

D. Dew point temperature

What is the correct answer?

4

__________ is not a case hardening process.

A. Carburising

B. Nitriding

C. Cyaniding

D. Annealing

What is the correct answer?

4

The dew point of moist air becomes __________ with decrease in its relative humidity.

A. Less than the wet bulb temperature

B. More than the wet bulb temperature

C. More than the dry bulb temperature

D. Equal to wet bulb temperature

What is the correct answer?

4

__________ test is the appropriate test to determine whether a material is ductile or brittle.

A. Impact

B. Cupping

C. Hardness

D. Tensile

What is the correct answer?

4

Which of the following hardness tests does not measure the indentation hardness of metals and alloys?

A. Vickers hardness test

B. Shore scleroscope test

C. Brinell hardness test

D. Rockwell hardness test

What is the correct answer?

4

A cylindrical rod subjected to a tensile strain within the elastic limit undergoes a volume change. If the volume strain is equal to half the tensile strain, then the Poisson's ratio of the rod is

A. 0

B. 0.33

C. 0.44

D. 0.25

What is the correct answer?

4

Basic open hearth furnace (BOF) is not used for producing __________ steel.

A. Killed

B. Rimming

C. High alloy

D. None of these

What is the correct answer?

4

Potable water means the water used for

A. Fire-fighting

B. Cooling

C. Drinking

D. Evaporation to produce steam

What is the correct answer?

4

Blast furnace slag is mainly molten

A. Sand

B. Magnesium silicate

C. Calcium silicate

D. Iron pyrite

What is the correct answer?

4

Out of the following, which will fracture most readity, when hit with a hard hammer?

A. Brass

B. Bronze

C. German silver

D. Cast iron

What is the correct answer?

4

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

What is the correct answer?

4

Plasma is

A. A high temperature neutral gas

B. Nothing but ionised gas

C. A source of steady and highest controllable pressure

D. Formed at very low temperature

What is the correct answer?

4

Hardening of steel is not possible, unless it is heated __________ critical point.

A. Above the highest

B. Above the lowest

C. Between the first & second

D. Between the second & third

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

Steel rods are normally used for concrete reinforcement because concrete and steel have almost equal

A. Tensile strength

B. Compressive strength

C. Young's modulus

D. Thermal co-efficient of expansion

What is the correct answer?

4

The usual energy consumption in electric arc furnace steel making is __________ KWh/ton of steel.

A. 60 - 100

B. 400 - 700

C. 1200 -1500

D. 2000 - 2300

What is the correct answer?

4

In chemical dehumidification of air

A. Both specific humidity & dry bulb temperature increases

B. Both specific humidity & dry bulb temperature decreases

C. Specific humidity decreases & dry bulb temperature increases

D. Specific humidity increases & dry bulb temperature decreases

What is the correct answer?

4

If the head is doubled in & centrifugal pump, the power required will increase in the ratio of

A. 23

B. 23/2

C. 25/2

D. 21/3

What is the correct answer?

4

Elimination of brittleness resulting from welding of saw blades is done by __________ of the welded portion.

A. Annealing

B. Toughening

C. Work hardening

D. Tempering

What is the correct answer?

4

Which of the following represents the correct time-temperature curve when a block of metal is heated above room temperature & then left to cool in the room following Newton's law of cooling in which the rate of temperature drop will go on decreasing with the passage of time.

A.

B.

C.

D.