Exams Questions and Answers

Q:

Most bacteria reproduce by

A) budding	B) binary fission
C) fragmentation	D) mitosis

Answer & Explanation Answer: B) binary fission

Explanation:

Most bacteria is reproduce by binary fission.

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4 6104

Q:

What is the maximum velocity with which a body of mass 'm' must enter a vertical loop of radius 'R'so that it can complete the loop?

A) 0 B) gR C) $\sqrt{2} g R$ D) $\sqrt{5 g R}$

A) A	B) B
C) C	D) D

Answer & Explanation Answer: D) D

Explanation:

To complete the vertical loop, the minimum speed required at the lowest point = $\sqrt{5 g R}$ .

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6 6102

Q:

A jogger running at 9 kmph alongside a railway track is 240 metres ahead of the engine of a 120 metre long train running at 45 kmph in the same direction. In how much time will the train pass the jogger ?

A) 10 sec	B) 48 sec
C) 36 sec	D) 56 sec

Answer & Explanation Answer: C) 36 sec

Explanation:

Given speed of jogger = 9 kmph
Speed of train = 45 kmph
As they are in same direction,
Relative speed = 45 - 9 = 36 kmph = 36x5/18 = 10 m/s
Distance = 240 + 120 = 360 mts
Time = distance/speed = 360/10 = 36 sec.

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Filed Under: Problems on Trains
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2 6101

Q:

A place where bees are kept in called

A) Apiary	B) Hive
C) Sanctuary	D) Mole

Answer & Explanation Answer: A) Apiary

Explanation:

a_place_where_bees_are_kept_in_called1559565045.jpg image

A place where honey bees are kept in called an Apiary or a bee yard.

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Filed Under: General Science
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8 6099

Q:

A room contains 3 brown, 5 black and 4 white chairs. Two chairs are picked and are put in the lawn. What is the probability that none of the chairs picked is white ?

A) 14/33	B) 14/55
C) 12/55	D) 13/33

Answer & Explanation Answer: A) 14/33

Explanation:

Total number of chairs = (3 + 5 + 4) = 12.

Let S be the sample space.

Then, n(s)= Number of ways of picking 2 chairs out of 12

$=^{12} 12_{2} = \frac{12 \times 11}{2 \times 1} = 66$

Let n(E) = number of events of selecting 2 chairs for selecting no white chairs.

$=^{8} C_{2} = \frac{8 \times 7}{2 \times 1} = 28$

Therefore required probability = 28/66 = 14/33.

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Filed Under: Probability
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15 6097

Q:

Which state in India has the maximum number of wildlife sanctuaries?

A) Madhya Pradesh	B) Odisha
C) Uttar Pradesh	D) Andhra Pradesh

Answer & Explanation Answer: A) Madhya Pradesh

Explanation:

Madhya Pradesh state has the maximum number of wildlife sanctuaries in India. It has total of 36 wildlife sanctuaries. In India, there are total 96 national parks and 510 wildlife sanctuaries.

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Filed Under: Indian Geography
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9 6095

Q:

The number of signals that can be generated by using 5 differently coloured flags, when any number of them may be hoisted at a time is:

A) 235	B) 253
C) 325	D) None of these

Answer & Explanation Answer: C) 325

Explanation:

Required number of signals = $5 P_{1} + 5 P_{2} + 5 P_{3} + 5 P_{4} + 5 P_{5}$

= 5 + 20 + 60 + 120 + 120 = 325

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Filed Under: Permutations and Combinations
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4 6091

Q:

Unsolicited e-mail is called a ______

A) Newsgroup	B) Usenet
C) Backbane	D) Spam

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