Bank PO Questions


Q:

Lami's theorem is applicable only for

A) Non-Concurrent forces B) Coplanar forces
C) Coplanar and concurrent forces D) Any type of forces
 
Answer & Explanation Answer: C) Coplanar and concurrent forces

Explanation:

The Lami's theorem states that " If three forces coplanar and concurrent forces acting on a particle keep it in equilibrium, then each force is proportional to the sine of the angle between the other two and the constant of proportionality is the same." This theorem is derived from the Sine rule of triangles.

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Filed Under: Arithmetical Reasoning
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12 10198
Q:

Which of the following has the highest frequency?

A) Cosmic rays B) X-rays
C) Radio waves D) Microwaves
 
Answer & Explanation Answer: A) Cosmic rays

Explanation:
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Filed Under: Physics
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30 10190
Q:

Find the wrong number in the given series :

26, 20, 16, 11, 8, 6, 5

A) 5 B) 26
C) 11 D) 16
 
Answer & Explanation Answer: D) 16

Explanation:

26 - 6 = 20

20 - 5 = 15

15 - 4 = 11

11 - 3 = 8

8 - 2 = 6

6 - 1 = 5

Therefore, 16 is wrong number.

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Filed Under: Number Series
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23 10188
Q:

The value of x satisfying the following relation:

log12x = log23x-2

A) 1/3 B) -1/3
C) 3 D) None of these
 
Answer & Explanation Answer: D) None of these

Explanation:

But at x=-1/3, log x is not defined.

 

The only admissible value of x is 1.

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Filed Under: Logarithms
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16 10186
Q:

A train for Fathehpur leaves for every 2 hrs 30 min from Agra station. An announcement was made that train left 37 mins ago and next train comes at 17:00hrs. At what time was the announcement made ? 

A) 15:07 hrs B) 15:20 hrs
C) 15:05 hrs D) 15:00 hrs
 
Answer & Explanation Answer: A) 15:07 hrs

Explanation:

Next train comes at 17:00 hrs.
So, last train will be = 17:00hrs - 2:30hrs
= 14:30hrs
Announcement made after 37 min of the last train.
S0, 14:30hrs + 00:37 min
= 15:07 hrs.

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Filed Under: Problems on Trains
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10 10184
Q:

Which one of the following does not contain Silver ?

A) Horn Silver B) Ruby Silver
C) Lunar Caustic D) German Silver
 
Answer & Explanation Answer: D) German Silver

Explanation:
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Filed Under: General Awareness
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30 10177
Q:

If (2a + 3b)/(5a - 3b) = 23/5 , then the value of ba is ?

A) 5 B) 4
C) 20 D) 28
 
Answer & Explanation Answer: C) 20

Explanation:

Given (2a + 3b)/(5a - 3b) = 23/5
=> 10a + 15b = 115a - 69b
=> 105a = 84b => 5a = 4b
a/b = 4/5 => a=4 & b=5
=> bxa = 5x4 = 20.

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7 10175
Q:

Rovers Cup is associated with

A) Tennis B) Football
C) Cricket D) Hockey
 
Answer & Explanation Answer: B) Football

Explanation:

Rovers Cup is associated with the sport football in India.

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Filed Under: Sports
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4 10156