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Q:

Sound becomes hazardous noise pollution at decibels?

A) above 120 db B) above 80 db
C) above 50 db D) above 30 db
 
Answer & Explanation Answer: A) above 120 db

Explanation:

Sound intensity is measured in decibels(db). Sound pollution above 120 db becomes more hazardous and have adverse affects on human life. 

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Filed Under: Physics
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11 7588
Q:

A person lends Rs. 1540 for five years and Rs. 1800 for four years. If he gets Rs. 1788 as interest on both amounts, what is the rate of interest ?

A) 14.5% B) 11%
C) 12% D) 10.5%
 
Answer & Explanation Answer: C) 12%

Explanation:

Let the interest rate be r%

We know that,

S.I = PTR/100

=> (1540 x 5 x r)/100  +  (1800 x 4 x r)/100 = 1788

=> r = 178800/14900 = 12%

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Filed Under: Simple Interest
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20 7586
Q:

A girl introduced a boy as the son of the daughter of the father of her uncle. The boy is girl's ?

A) Son B) Brother
C) Cousin D) Nephew
 
Answer & Explanation Answer: B) Brother

Explanation:

Brother

Justification: Daughter of uncle's father -- Uncle's sister -- Mother;
Mother's son -- Brother.

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Filed Under: Blood Relations
Exam Prep: AIEEE , Bank Exams , CAT , GATE , GRE , TOEFL
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13 7583
Q:

The average age of a couple and their son was 40 years, the son got married and a child was born just two years after their marriage. When child turned to 10 years, then the average age of the family becomes 38 years. What was the age of the daughter in law at the time of marriage ?

A) 12 years B) 10 years
C) 14 years D) 13 years
 
Answer & Explanation Answer: A) 12 years

Explanation:

Given the average age of couple and their son = 40

=> Sum of age (H +W +S) = 40×3

Let the age of daughter in law at the time of marriage = D years

Now after 10 years,

(H + S +W) + 3×12 + D +12 + 10 = 38×5

178 + D = 190

D = 190 -178 = 12 years

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Filed Under: Problems on Ages
Exam Prep: AIEEE , Bank Exams , CAT , GATE
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13 7581
Q:

Study the following figure and answer the questions given below.

 

 

By which number, the trained unmarried lecturers in the college are represented?

A) 6 B) 5
C) 7 D) 4
 
Answer & Explanation Answer: D) 4

Explanation:
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Filed Under: Logical Venn Diagram
Exam Prep: Bank Exams

0 7581
Q:

Two concentric circles form a ring. The inner and outer circumferences of ring are  5187m and 3527 m respectively. Find the width of the ring.

A) 4 B) 5
C) 6 D) 7
 
Answer & Explanation Answer: A) 4

Explanation:

Let the inner and outer radii be r and R metres.

 

Then  2πR=3527=>R=3527*722*12=8m 

 

 2πR=5287=>R=5287*722*12=12m

 

=> Width of the ring = (R - r) = (12 - 8) m = 4 m.

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Filed Under: Area
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0 7580
Q:

Variable number of tandem repeats (VNTRs) in the DNA molecule are highly useful in

A) Recombinant DNA technology B) Monoclonal antibody production
C) Stemcell culture D) DNA fingerprinting
 
Answer & Explanation Answer: D) DNA fingerprinting

Explanation:
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Filed Under: Biology
Exam Prep: AIEEE

23 7572
Q:

Archipelago : Islands :: Massif : ?

A) Caves B) Hillocks
C) Mountains D) Forests
 
Answer & Explanation Answer: C) Mountains

Explanation:

First is a group of the second.

Hence, Archipelago : Islands :: Massif : Mountains.

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Filed Under: Analogy
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3 7569