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Q:

There is an empty reservoir whose capacity is 30 litres. There is an inlet pipe which fills at 5 L/min and there is an outlet pipe which empties at 4 L/min. Both the pipes function alternately for 1 minute. Assuming that the inlet pipe is the first one to function, how much time will it take for the reservoir to be filled up to its capacity?

A) 49.5 min	B) 50 min
C) 51 min	D) 52 min

Answer & Explanation Answer: C) 51 min

Explanation:

The work to be done = Capacity of reservoir = 30 litres.

1^st Minute ---> inlet pipe opened ---> 5 lit filled

2^nd minute ---> inlet pipe closed; outlet pipe opened ---> 4 lit emptied

In 2 minutes (5 litres - 4 litres = 1lit) is filled into the reservoir.

It takes 2 minutes to fill 1lit ---> it takes 50 minutes to fill 25 litres into the reservoir.

In the 51^st minute inlet pipe is opened and the reservoir is filled.

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Filed Under: Pipes and Cistern
Exam Prep: CAT
Job Role: Bank PO

Q:

If log 64 = 1.8061, then the value of log 16 will be (approx)?

A) 1.9048	B) 1.2040
C) 0.9840	D) 1.4521

Answer & Explanation Answer: B) 1.2040

Explanation:

Given that, log 64 = 1.8061

i.e $\log (4^{3}) = 1.8061$

--> 3 log 4 = 1.8061

--> log 4 = 0.6020

--> 2 log 4 = 1.2040

$\Rightarrow \log (4^{2}) = 1.2040$

Therefore, log 16 = 1.2040

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Filed Under: Logarithms
Exam Prep: CAT
Job Role: Bank Clerk

Q:

An industrial loom weaves 1.14 meters of cloth every second. Approximately, how much time will it take to weave 52 meters of cloth ?

A) 29.32 sec	B) 42.51 sec
C) 39.25 sec	D) 45.61 sec

Answer & Explanation Answer: D) 45.61 sec

Explanation:

Given loom weaves 1.14 mts of cloth in one second then 52 mts of cloth can be weaved by loom in,

1.14 ----- 1

52.0 ------?

$\Rightarrow \frac{52}{1.14}$ = 45.61 sec

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Filed Under: Chain Rule
Exam Prep: CAT
Job Role: Bank PO

Q:

What is the capital of Bangladesh ?

A) Dhaka	B) Chittagong
C) Khulna	D) Sylhet

Answer & Explanation Answer: A) Dhaka

Explanation:

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Filed Under: Country Capitals

Q:

What is the capital of Cuba ?

A) Bayamo	B) Amancio
C) Havana	D) Sandino

Answer & Explanation Answer: C) Havana

Explanation:

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Filed Under: Country Capitals

Q:

What is the capital of Canada ?

A) Ottawa	B) Regina
C) Victoria	D) None of the above

Answer & Explanation Answer: A) Ottawa

Explanation:

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Filed Under: Country Capitals

Q:

The command used to remove text or graphics from a document. The information is then stored on a clipboard so you can paste it.

A) cut	B) Chop
C) Cart away	D) Clip

Answer & Explanation Answer: A) cut

Explanation:

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Filed Under: Computer

Q:

The capacity of a pure capacitor is 1 farad. In D.C circuit, its effective resistance will be

A) Zero	B) Infinite
C) 1 Ohm	D) 1/2 Ohm

Answer & Explanation Answer: B) Infinite

Explanation:

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Filed Under: Physics

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