RRB NTPC 2019 Mini Mock Test

Question 1

Who first discovered the Cholera causing germ?

Solution:

 

Oops! Wrong answer!

    • It was Filippo Pacini who first discovered the cholera-causing germs.

 

    • He was an Italian Anatomist who became famous for separating cholera bacterium Vibrio cholerae in 1854.

 

Difficulty Level: Medium
Correct Attempts: 0%
Topic: Biology

Question 2

Why are plants grown along river banks?

Solution:

 

Oops! Wrong answer!

Plants are grown along river banks to reduce silting and erosion. It is done to prevent excessive soil from getting eroded and getting deposited in the river bed, which then reduces the water carrying capacity of the river.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Biology

Question 3

In which of the following ways Vitamin D plays an important role in our body?

Solution:

 

Correct Answer

Vitamin D is one of many nutrients our bodies need to stay healthy. Among the vitamin’s main functions, it helps the body:
• Absorb calcium. Vitamin D, along with calcium, helps build bones and keep bones strong and healthy.
• Block the release of parathyroid hormone. This hormone reabsorbs bone tissue, which makes bones thin and brittle.
Vitamin D may also play a role in muscle function and the immune system. The immune system is your body’s defense system. It helps protect it against infections and other illnesses. Taking vitamin D every day has been shown to reduce the risk of falling in older individuals.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Biology

Question 4

P starts from a point and walks towards the North for a certain distance and then takes her right and walks for a certain distance. She again takes her left and walks for a certain distance and finally takes her left and moves forward. In which direction is P moving forward?

Solution:

 

Oops! Wrong answer!

The diagram will be,


Hence, P is walking in west direction.
So, correct answer is option D.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Distance and Direction Test

Question 5

Which of the following stores data permanently in a computer?

Solution:

 

Oops! Wrong answer!

  • ROM abbreviated as Read Only Memory stores data permanently in a computer. ROM a non volatile memory which retains its contents even when the computer is turned off and it is used to store critical programs which helps to boot up the computer further the data stored in this cannot be modified.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Physics

Question 6

Which one of the following does’t exhibits paramagnetic property?

Solution:

 

Oops! Wrong answer!

  • Those materials which when placed in a magnetic field become weakly magnetized in a direction opposite to that of the applied field, are called as diamagnetic materials. Example: bismuth, antimony,coppergoldquartz, mercury, water, alcohol, air, hydrogen
  • Paramagnetic property refers to the property of the materials to be attracted to a magnetic field. Iron, Cobalt and Nickel exhibit paramagnetic property.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Physics

Question 7

Select the missing number from the given responses:

Solution:

 

Oops! Wrong answer!

1st column elements are sum of 2nd column and respective elements of 3rd column.
134 = 34 + 100
117 = 86 + 31
87 = 23 + 64
Hence, the correct option is B.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Missing Number

Question 8

A sum of Rs. 12000 is compounded annually at the rate of 7% for the 1st year and at 10% for the 2nd. What will be the amount after 2 years?

Solution:

 

Oops! Wrong answer!



Difficulty Level: Medium
Correct Attempts: 0%
Topic: Compound and Simple Interest

Question 9

The difference between simple and compound interests compounded annually on a certain sum of money for 2 years at 4% per annum is Rs 8. The sum is
______.

Solution:

 

Oops! Wrong answer!

Difference between ci and si= 8
Rate of interest =4% and time period= 2
We know that

P=8× 625=5000
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Compound and Simple Interest

Question 10

Bones in human body supported by which of the following?

Solution:

 

Oops! Wrong answer!

The human skeleton consists of both fused and individual bones supported  by ligaments, tendons, muscles and cartilage.
• It serves as a scaffold which supports organs, anchors muscles, and protects organs such as the brain, lungs, heart and spinal cord.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Biology

Question 11

How many numbers less than 1000 are multiples of both 10 and 13?

Solution:

 

Oops! Wrong answer!

The number of multiples of 130 are obtained dividing 1000 by 130. The quotient i.e., 7 given result.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Divisibility And Remainder

Question 12

A man moves 27 meters in south direction and turns 90 ° clockwise and moves 9 meters and takes a right turn and moves 5 meters and then moves 5 meters in south direction. find the shortest distance between initial and final positions.

Solution:

 

Oops! Wrong answer!


Shortest distance betweeen initial point and final point = (27)2 + (9)2
⇒ 810 = 9 × 9 × 10 = 9√10 m
Hence, option D is correct.
Difficulty Level: Medium
Correct Attempts: 0%
Topic: Distance and Direction Test

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