Some Basic Questions Of Science And Engineering

2.

Unit of inductance is:

Farad
Ohm
Henry
Mho

Correct Answer

A. Henry

Explanation

The unit of inductance is Henry. Inductance is a property of an electrical circuit that opposes changes in current flow. It is measured in Henry (H), named after the American scientist Joseph Henry. Inductance is used to store energy in magnetic fields and is commonly found in devices such as inductors and transformers. Farad is the unit of capacitance, Ohm is the unit of resistance, and Mho (reciprocal of Ohm) is the unit of conductance.

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3.

The frequency of a DC signal is:

50 Hz
Zero
100 Hz
None of the above

Correct Answer

A. Zero

Explanation

The frequency of a DC signal is zero because DC stands for direct current, which means that the current flows in only one direction with a constant magnitude. Unlike AC (alternating current), which changes direction periodically, DC does not have any oscillation or frequency. Therefore, the correct answer is zero.

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4.

When was C programming invented?

1987
1967
1997
1977

Correct Answer

A. 1977

Explanation

C programming was invented in 1977.

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1

5.

The keyword used to transfer the control from sub routine to main function is:

Return
Go back
Exit
Escape

Correct Answer

A. Return

Explanation

The keyword "Return" is used to transfer the control from a subroutine to the main function. When a subroutine is called within a program, it performs its tasks and then returns the control back to the point where it was called. This allows the main function to continue executing the remaining code after the subroutine call.

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2

6.

Engineer's Day is celebrated in India in honor of:

Sir Mokshagundam Visvesvaraya
Aryabhata
Homi Bhabha
Yellapragada Subbarao

Correct Answer

A. Sir Mokshagundam Visvesvaraya

Explanation

Engineer's Day is celebrated in India in honor of Sir Mokshagundam Visvesvaraya. He was a renowned engineer, statesman, and the Diwan of Mysore. Visvesvaraya made significant contributions to the field of engineering and played a crucial role in the development of India's infrastructure. He was instrumental in the construction of several dams, bridges, and irrigation systems. His expertise and dedication to engineering have made him a symbol of inspiration for aspiring engineers in India. Therefore, Engineer's Day is celebrated to commemorate his achievements and to acknowledge the importance of engineering in society.

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7.

Which of the following is NOT a green house gas?

Hydrogen
Carbon di oxide
Nitrous oxide
Methane

Correct Answer

A. Hydrogen

Explanation

Hydrogen is not a greenhouse gas because it does not trap heat in the Earth's atmosphere. Greenhouse gases, such as carbon dioxide, nitrous oxide, and methane, are responsible for the greenhouse effect, which causes the Earth's temperature to rise. Hydrogen, on the other hand, is a highly flammable gas and does not contribute to the greenhouse effect.

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8.

Who discovered the radioactive element radium?

Marie Curie
Albert Einstein
Benjamin Franklin
Isaac Newton

Correct Answer

A. Marie Curie

Explanation

Marie Curie is the correct answer because she is widely recognized as the discoverer of the radioactive element radium. Curie, along with her husband Pierre Curie, conducted extensive research on radioactivity and made significant contributions to the field. In 1898, they successfully isolated radium from a uranium ore sample, marking a major breakthrough in the understanding of radioactive elements. Marie Curie's pioneering work in this area earned her numerous accolades, including becoming the first woman to win a Nobel Prize and the only person to win Nobel Prizes in two different scientific fields.

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9.

Who invented and patent dynamite?

A. Nobel
J. R. Gluber
G. Fawks
W. Bickford

Correct Answer

A. A. Nobel

Explanation

Alfred Nobel is the correct answer because he invented and patented dynamite. Alfred Nobel, a Swedish chemist and engineer, developed dynamite in the late 19th century. His invention revolutionized the construction and mining industries, as it provided a safer and more efficient way to handle explosives. Nobel's invention of dynamite had a significant impact on various fields, earning him a place in history as one of the most influential inventors.

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1

Some Basic Questions Of Science And Engineering

A step up motor increases:

Quiz Preview

Unit of inductance is:

The frequency of a DC signal is:

When was C programming invented?

The keyword used to transfer the control from sub routine to main function is:

Engineer's Day is celebrated in India in honor of:

Which of the following is NOT a green house gas?

Who discovered the radioactive element radium?

Who invented and patent dynamite?