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Q:

Which of the following menu types is also called a drop down menu?

A) fly-out	B) cascading
C) pop-up	D) pull-down

Answer & Explanation Answer: D) pull-down

Explanation:

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Filed Under: Computer

Q:

Which of the following software applications would be the most appropriate for performing numerical and statistical calculations?

A) Database	B) Document Processor
C) Graphic Package	D) Spread Sheet

Answer & Explanation Answer: D) Spread Sheet

Explanation:

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Filed Under: Computer

Q:

The grouping of blood is based on substances called

A) antibodies	B) antigens
C) antitoxin	D) enzymes

Answer & Explanation Answer: B) antigens

Explanation:

The red blood corpuscles or Erythrocytes usually carry antigens and there are two types of antigens. The A group persons have antigen A in their red corpuscles and the B group have antigen A in their red corpuscles.The AB group persons have both antigen A and antigen B in their erythrocytes.The 'O'group persons have no antigens in their red corpuscles.

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Filed Under: Biology

Q:

Damage to hearing is caused by sounds which exceed

A) 70 decibels	B) 80 decibels
C) 100 decibels	D) 120 decibels

Answer & Explanation Answer: D) 120 decibels

Explanation:

High frequency sound attacks the tympanic memberance and makes it defective. 120 decibels is too high a pitch to be heard and therefore it impairs the hearing ability.

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Filed Under: Biology

Q:

At what temperature do the Fahrenheit and celcius scales give the same reading?

A) 212 degrees	B) 32 degreees
C) -40 degreees	D) 0 degreees

Answer & Explanation Answer: C) -40 degreees

Explanation:

We want the temperature when F=C.

We know that, $F = C x \frac{9}{5} + 32$

So substituting C For F, we have C = $- 40^{o}$

Therefore, C = -40.

Thus when C = -40, we have C = F

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Filed Under: Physics
Exam Prep: CAT , AIEEE
Job Role: Bank PO

Q:

A boat loaded with rocks floats in the middle of a swimming pool. A man in the boat throws the rocks overboard. The level of water in the pool will

A) increase	B) decrease
C) remains the same	D) first decrease and then increase

Answer & Explanation Answer: B) decrease

Explanation:

Let M and m grams be the mass of boat + rock in it. By law of floatation(M+m) grams of water will be displaced. This has a volume of (M+m)cc. That means the level of water in pool has risen up by (M+m)cc with the boat + rock when it is floating. If the rocks in the boat are thrown not into the pool but outside, the weight left is only M grams the weight of the boat. This will have displaced M cc of water only i.e less water than in the case of loaded boat. But if the rocks are put in the water in the pool and not outside, then the water in the pool will rise not only by M cc on account of empty boat but also by a volume of the stone put into it. This volume will be $\frac{m}{d}$ where m is the mass of rock and d density of rock.

Now $\frac{m}{d}$ is < m. Thus the total rise will be $(M + \frac{m}{d})$ which is < M + m.

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Filed Under: Physics
Exam Prep: AIEEE , CAT
Job Role: Analyst

Q:

A boy is swinging a ball attached to a string in a horizontal circle.If the string snaps

A) the ball will travel towards the center of the circle and fall down	B) it will continue to travel along a tangent to the circle at the point the ball was at the time of snapping and finally fall down
C) it will fall down at the same place where the string breaks	D) none of these

Answer & Explanation Answer: B) it will continue to travel along a tangent to the circle at the point the ball was at the time of snapping and finally fall down

Explanation:

The centripetal force having been removed the body cannot execute the curved path. (B) is Correct.

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Filed Under: Physics

Q:

In the case of bodies falling under gravity which of the following remains constant at a given place?

A) Kinetic energy	B) Potential energy
C) acceleration	D) all the above

Answer & Explanation Answer: C) acceleration

Explanation:

This acceleeration denoted by letter g varies from place to place. Unless stated otherwise, it can be taken 9.8 m/ $s^{2}$ .

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Filed Under: Physics
Exam Prep: AIEEE

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