Q:

Two metallic plate of equal thickness and coefficient thermal conductivity K1 and K2 put together face to face. A common plate is constructed. What is equivalent K?

A) K1k2/k1+k2	B) 2k1k2/k1+k2
C) K1+k2/k1k2	D) None

Answer & Explanation Answer: B) 2k1k2/k1+k2

Explanation:

We know that,

The equivalent K = $\frac{L 1 + L 2}{\frac{L 1}{K 1} + \frac{L 2}{K 2}}$

where L1 & L2 are plate1 & Plate2 thicknesses, K1 & K2 are coefficient thermal conductivity of plate1 & Plate2 respectively.

But here L1 = L2 = L (say)

Then K = L+L/(L/K1 + L/K2) = $\frac{2 K 1 K 2}{K 1 + K 2}$

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Q:

Find the person who does not belongs to the group.

A) MS Dhoni	B) Sunita Williams
C) Kalpana Chawla	D) Rakesh Sharma

Answer & Explanation Answer: B) Sunita Williams

Explanation:

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Filed Under: Famous Personalities
Exam Prep: Bank Exams

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Q:

Which Schedule of Indian Constitution was added by 73rd Constitutional Amendment Act?

A) Eight Schedule	B) Ninth Schedule
C) Tenth Schedule	D) Eleventh Schedule

Answer & Explanation Answer: D) Eleventh Schedule

Explanation:

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Filed Under: Indian Politics
Exam Prep: Bank Exams

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Q:

Decibel is the unit of

A) speed of light	B) intensity of sound
C) intensity of heat	D) None of these

Answer & Explanation Answer: B) intensity of sound

Explanation:

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Filed Under: Physics

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Q:

‘World Sustainable Development Summit’ is organized by which institution?

A) The Energy and Resources Institute	B) World Economic Forum
C) NITI Aayog	D) UNDP

Answer & Explanation Answer: A) The Energy and Resources Institute

Explanation:

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Filed Under: General Awareness
Exam Prep: Bank Exams

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Q:

Which Governor General of India used to write poetry with the name of "Owen Meredith"?

A) Lord Dalhousie	B) Lord Ripon
C) Lord Lytton	D) Lord Canning

Answer & Explanation Answer: C) Lord Lytton

Explanation:

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Filed Under: Indian Politics
Exam Prep: Bank Exams

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Q:

An object at rest may have

A) Momentum	B) Potential energy
C) Velocity	D) Kinetic energy

Answer & Explanation Answer: B) Potential energy

Explanation:

An object at rest may have Potential energy.

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Filed Under: Physics
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Q:

In a certain city, 5% of all the persons in town have unlisted phone numbers. If you select 100 names at random from that city's phone directory, how many people selected will have unlisted phone numbers?

Answer

Zero. You are selecting names from the list, so they are all listed.

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Subject: Math Puzzles

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