Home
Current Affairs January 2024

What is the correct answer?

4

A high pressure boiler generates steam at a pressure greater than __________ kg/cm2.

A. 10

B. 30

C. 50

D. 80

Correct Answer :

D. 80


Related Questions

What is the correct answer?

4

What is the percentage of chromium in 18-4-1 high speed steel?

A. 1

B. 4

C. 18

D. 23

What is the correct answer?

4

While the bin cards are used in the effective stores management, the queuing theory is associated with the __________ time.

A. Waiting

B. Idle

C. Inspection

D. Tool replacement

What is the correct answer?

4

The most important requirement for aluminium industry is the availability of cheap

A. Ore

B. Electrical power

C. Labour

D. Abundant water

What is the correct answer?

4

Case hardening of a material is

A. Followed by tempering or carburising

B. Preceded by its tempering

C. Done to get a soft ductile interior with a very hard surface

D. Carried out to get extreme hardness in its core

What is the correct answer?

4

During decarburising of a plain carbon steel, the thickness of ferrite layer growth is proportional to

A. Time

B. Square root of time

C. Square of time

D. Cube of time

What is the correct answer?

4

For a spontaneous natural process at constant temperature and pressure, the free energy of the system always

A. Increases

B. Decreases

C. Remain constant

D. Increases to a maximum before decreasing

What is the correct answer?

4

Routing in production, planning & control is concerned with the

A. Sequence of operation to be performed

B. Progress of work performed

C. Authorisation of work to be performed

D. Balancing of load on machines

What is the correct answer?

4

The maximum thickness of the metal which can be welded using ultrasonic welding is __________ mm.

A. 0.5

B. 3

C. 10

D. 25

What is the correct answer?

4

Cold cracking in the heat affected zone of a high strength steel weld can take place because of the

A. Retained austenite

B. Martensite formation

C. Relatively high sulphur content in the base metal

D. Sufficient hydrogen present in the welding arc

What is the correct answer?

4

Mho's scale of hardness, which consists of 10 standard minerals is used for the measurement of __________ hardness.

A. Scratch

B. Indentation

C. Dynamic

D. Rebound

What is the correct answer?

4

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

A. Pressure

B. Thermit

C. Resistance

D. Arc

What is the correct answer?

4

Breakeven point represents the condition, when the company runs under no profit no loss condition. In break even analysis, total cost comprises of fixed cost

A. Only

B. Plus variable cost

C. Plus overhead cost

D. Plus selling expenses

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

The diffusion co-efficient of Ni in Cu at 1000 K is 1.93 × 10-16 m2S-1 and it is 1.94 × 10-14 m2S- 1 at 1200 K. The activation energy (in k. J.mole-1) for the diffusion of Ni in Cu is

A. 130

B. 180

C. 230

D. 250

What is the correct answer?

4

Alloying elements present in Haynes stellite, which has superior performance than high speed steel, are:

A. Nickel, cobalt & chromium

B. Tungsten, chromium & cobalt

C. Manganese, chromium & cobalt

D. Tungsten, molybdenum & nickel

What is the correct answer?

4

Wrought iron is not

A. Ductile & resistant to corrosion/rusting

B. Weldable easily

C. Having uniform strength in all directions

D. Having maximum tensile strength along the lines of slag distribution

What is the correct answer?

4

Steel is welded using the __________ flame.

A. Carburising

B. Neutral

C. Oxidising

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

What is the correct answer?

4

X-rays are

A. Positively charged

B. Negatively charged

C. Neutral

D. Of higher wavelength than visible light

What is the correct answer?

4

Which of the following has the least value of ultimate tensile strength (UTS)?

A. Medium carbon steel

B. High carbon steel

C. Cast iron

D. Wrought iron

What is the correct answer?

4

Transition from laminar to turbulent zone in free convection heat transfer is governed by the critical value of

A. Grashoff number

B. Grashoff number & Reynolds number

C. Reynolds number

D. Grashoff number & Prandtl number

What is the correct answer?

4

Material of construction of foundry crucible is

A. Lead

B. Stainless steel

C. Graphite

D. Cast iron

What is the correct answer?

4

Saturated steam at a pressure of 25 kg/cm2 is throttled to attain 5 kg/cm2. Then the outcoming steam will be

A. Wet

B. Saturated

C. Superheated

D. None of these

What is the correct answer?

4

Though tin occurs lower than iron in the electrochemical series, yet it is coated on steel for corrosion protection, because of its

A. Lower cost

B. Abundant availability

C. Resistance to vegetable acids as the tin plate are commercially used in 'canning' industry

D. None of these

What is the correct answer?

4

Particle nature of cathode rays is proved due to the fact that they

A. Travel in a straight line

B. Get deflected by magnetic electric field

C. Produce fluorescence

D. Heat the exposed material

What is the correct answer?

4

Matte smelting is used in the extraction of

A. Lead

B. Zinc

C. Aluminium

D. Copper

What is the correct answer?

4

Hot working of lead is carried out at

A. 75°C

B. 373°K

C. 150°C

D. Room temperature

What is the correct answer?

4

Maximum permissible air velocity in pipelines is about __________ metre/second.

A. 5

B. 10

C. 20

D. 40

What is the correct answer?

4

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

What is the correct answer?

4

Lead is poured into the joints between two __________ pipes.

A. Cast iron

B. Steel

C. Concrete

D. Plastic

What is the correct answer?

4

Corrosion rate cannot be lowered by reducing the __________ of the corroding medium.

A. Concentration

B. Velocity

C. Temperature

D. None of these