Questions

Q:

I am a word. I become longer when the third letter is removed. What am I?

Answer

Lounger,


When the third letter i.e, 'U' is removed from the lounger, it becomes Longer.

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Subject: Word Puzzles Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Analyst , Bank Clerk , Bank PO

33 6024
Q:

If (a+c+1) = 0, then find the value of a3 + c3 + 1 - 3ac

 

 

A) -1 B) 1
C) 2 D) 0
 
Answer & Explanation Answer: D) 0

Explanation:
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Filed Under: Honours and Awards
Exam Prep: Bank Exams

0 6024
Q:

The boundaries of the plates of the earth's crust are the weak zones known as ___________ zones.

 

A) cosmic B) seismic
C) formic D) anaemic
 
Answer & Explanation Answer: B) seismic

Explanation:
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Filed Under: General Science
Exam Prep: Bank Exams

2 6021
Q:

Arjuna award is given for

A) Excellence in sports B) Excellent service during emergency
C) Bravery in the battle field D) Excellence in archery
 
Answer & Explanation Answer: A) Excellence in sports

Explanation:

The Arjuna Awards are given by the Ministry of Youth Affairs and Sports, Government of India to recognize outstanding achievement in sports. Started in 1961, the award carries a cash prize of ₹ 500,000, a bronze statue of Arjuna and a scroll.

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Filed Under: Sports
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5 6016
Q:

Microwave communication uses high-frequency.

A) TRUE B) FALSE
Answer & Explanation Answer: A) TRUE

Explanation:

Microwaves are high-frequency signals in the 300 MHz to 300 GHz range. This is in contrast to radio signals, which are typically broadcast in all directions. Radio signals operate in the 3 Hz to 300 MHz range.


Microwave signals are used for both satellite and ground-based communications.

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Subject: Physics
Exam Prep: AIEEE , Bank Exams , GATE
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5 6015
Q:

What causes brownian motion in colloids?

A) coagulation of particles and the dispersed phase B) erratic flashes of light
C) molecules of the dispersion medium colliding with dispersed phase particles D) All the above
 
Answer & Explanation Answer: C) molecules of the dispersion medium colliding with dispersed phase particles

Explanation:

When their is a colloid in the solution, then it will show the Brownian movement, such as dust particle in the air will show the Brownian movement.

 

Hence, Brownian movement arises due to the impact of the molecules of the dispersion medium with the colloidal particles. It has been postulated that the impact of the molecules of dispersion medium on the colloidal particles are unequal.

 

This leads to the zig-zag (random) motion of the colloidal particles.

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Filed Under: Physics
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6 6011
Q:

A tennis ball machine serves a ball vertically into the air from a height of 2 feet, with an initial speed of 110 feet per second. After how many seconds does the ball attain its maximum height?

A) 2.87 sec B) 3.44 sec
C) 4.65 sec D) 5.41 sec
 
Answer & Explanation Answer: B) 3.44 sec

Explanation:

It is launched vertically with an initial speed of 110 ft/sec.

It will reach maximum height when the speed drops to 0.

Vo=110 feet per second 

ho=2 feet 

So, h(t) = -16t^2 +110t +2 

Take the derivative: h'(t) = 110 -32t 

The maximum height will be at the inflection when the derivative crosses the x-axis, then h'(t)=0. 

So, set h'(t)=0 and solve for t: 

0 = 110 -32t 

-110 = -32t 

t=3.4375 

t=3.44 seconds.

 

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Filed Under: Physics
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3 6010
Q:

Who invented fuel cells in 1839?

A) Buckminster Fuller B) Sir William Grove
C) Sylvester Graham D) Joyce Hall
 
Answer & Explanation Answer: B) Sir William Grove

Explanation:
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Filed Under: Inventions

11 6009