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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Filed Under: Physics
Exam Prep: GATE , Bank Exams , AIEEE
Job Role: Network Engineer

12 7108

Q:

Germany signed the Armistice Treaty on ____ and World War I ended

A) January 19, 1918	B) May 30, 1918
C) November 11, 1918	D) February 15, 1918

Answer & Explanation Answer: C) November 11, 1918

Explanation:

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Filed Under: General Awareness

20 7108

Q:

Select the related word/letters/numbers from the given alternatives:

5 : 100 :: 7 : ?

A) 49	B) 196
C) 91	D) 135

Answer & Explanation Answer: B) 196

Explanation:

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Filed Under: Quantitative Aptitude - Arithmetic Ability

0 7106

Q:

Select the related word/letters/numbers from the given alternatives:

9 : 162 :: 8 : ?

A) 96	B) 112
C) 128	D) 160

Answer & Explanation Answer: C) 128

Explanation:

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Filed Under: Verbal Reasoning - Mental Ability

0 7105

Q:

Nord Stream 2 pipeline, which was making news recently, passes through which Sea?

A) Red Sea	B) Caspian Sea
C) East China Sea	D) Baltic Sea

Answer & Explanation Answer: D) Baltic Sea

Explanation:

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Filed Under: General Awareness
Exam Prep: Bank Exams

0 7104

Q:

Baking soda is used ______.

I. for making baking powder

II. in soda-acid fire extinguishers

III. to neutralize excess acid in the stomach

A) Only I and II	B) Only I and III
C) Only II and III	D) All I, II and III

Answer & Explanation Answer: D) All I, II and III

Explanation:

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Filed Under: Chemistry
Exam Prep: AIEEE , Bank Exams

2 7103

Q:

Which element has similar properties to Beryllium?

A) Manganese	B) Calcium
C) Both A & B	D) Helium

Answer & Explanation Answer: B) Calcium

Explanation:

The elements in the same column will have similar properties. Beryllium is the group II element. Group II elements are magnesium, calcium, strontium, barium and radium. Hence, these show the similar prperties.

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Filed Under: Chemistry
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Analyst , Bank Clerk , Bank PO

7 7092

Q:

Select the synonym of

swine

A) hog	B) simple
C) immaculate	D) shine

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