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Test : General Science - 1


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20 Questions MCQ Test NDA (National Defence Academy) Mock Test Series | Test : General Science - 1

Test : General Science - 1 for Defence 2022 is part of NDA (National Defence Academy) Mock Test Series preparation. The Test : General Science - 1 questions and answers have been prepared according to the Defence exam syllabus.The Test : General Science - 1 MCQs are made for Defence 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test : General Science - 1 below.
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Test : General Science - 1 - Question 1

Why does ice covered in sawdust not melt quickly?

Detailed Solution for Test : General Science - 1 - Question 1

Saw dust is used to cover ice because it is poor conductor of heat. It did not let the ice melt quickly, as it does not transfer the heat of the surrounding to the ice.

Test : General Science - 1 - Question 2

The washing machine works on the principle of ____________

Detailed Solution for Test : General Science - 1 - Question 2

The washing machine works on the principle of Centrifugation.

Test : General Science - 1 - Question 3

An air bubble in water will act like a: 

Detailed Solution for Test : General Science - 1 - Question 3

Air is optically rarer than water, the ray of light bends away from the normal at the point of incidence when moving from water to air while it bends towards the normal while moving from air to water. It is clearly visible that the air bubble acts as a DIVERGING LENS (concave lens) in water.

Test : General Science - 1 - Question 4

The frequency of direct current is ____________

Detailed Solution for Test : General Science - 1 - Question 4

DC implies no changes in value. Frequencies of signals are defined by how many changes per time, e.g. 60 cycles per second. In case of DC with there are 0 changes per second. Hence the frequency of DC is zero.

Test : General Science - 1 - Question 5

If a body is moving on a circular path, what is its average velocity if it completes one cycle in one second?

Detailed Solution for Test : General Science - 1 - Question 5

When a body is moving in a circular path, its average velocity when it complete one cycle in one second is zero.

Test : General Science - 1 - Question 6

Carnotite is an ore/mineral of _________. 

Detailed Solution for Test : General Science - 1 - Question 6

Carnotite an important uranium ore.

Test : General Science - 1 - Question 7

There is a protocol signed to reduce production of CFC, known as -

Detailed Solution for Test : General Science - 1 - Question 7

The Montreal Protocol is an international environmental agreement with universal ratification to protect the earth’s ozone layer by eliminating use of ozone depleting substances (ODS) like CFC, which would otherwise allow increased UV radiation to reach the earth.

Test : General Science - 1 - Question 8

Malachite is an ore/mineral of -

Detailed Solution for Test : General Science - 1 - Question 8

Malachite is an ore/mineral of copper.

Test : General Science - 1 - Question 9

Which among the following will be a negative ion?

Detailed Solution for Test : General Science - 1 - Question 9

Negative ion which is created by an electron gain and it has more electrons than protons.

Test : General Science - 1 - Question 10

Why metals conduct electricity?

Detailed Solution for Test : General Science - 1 - Question 10

Metals conduct electricity because of free electrons.

Test : General Science - 1 - Question 11

 What is the largest component of lower atmosphere, by total volume?​

Detailed Solution for Test : General Science - 1 - Question 11

By volume, Nitrogen is the largest component of the lower atmosphere.

Test : General Science - 1 - Question 12

Acetic Acid is another name for which of the following?

Detailed Solution for Test : General Science - 1 - Question 12

Acetic acid is also known as vinegar.

Test : General Science - 1 - Question 13

The reaction of Copper Sulphate and Iron produces Iron Sulphate and __________.

Detailed Solution for Test : General Science - 1 - Question 13

The reaction of Copper Sulphate and Iron produces Iron Sulphate and Copper. It is a single displacement reaction.

Test : General Science - 1 - Question 14

If the mass of an object is 60 kgs, what will be its weight on the moon? (N=Newton)

Detailed Solution for Test : General Science - 1 - Question 14

mass of object,m = 60 kg

g = 9.8 m/s^2

So, weight of object on earth = mg

= 60×9.8

= 588 N

Weight of object on moon = 1/6 ×

(weight of object on earth)

= 1/6 × 588

= 98 N

Test : General Science - 1 - Question 15

The side mirrors of vehicles are of which type of mirrors?

Detailed Solution for Test : General Science - 1 - Question 15

The convex mirror produces an upright image of any object and offers a wide viewing area as compared to the plane mirror. The usage of this type of mirror can be perceived on the car rear-view mirror, side-view mirror and even the motorcycles.

Test : General Science - 1 - Question 16

UV rays coming from Sun, majorly causes which cancer? 

Detailed Solution for Test : General Science - 1 - Question 16

Ultraviolet (UV) radiation from the sun or sunbeds is the main cause of skin cancer.

Test : General Science - 1 - Question 17

Which drug is used as an Antidiabetic drug?

Detailed Solution for Test : General Science - 1 - Question 17

Metformin is an oral antidiabetic drug for the treatment of diabetes.

Test : General Science - 1 - Question 18

Which of the following is a viral disease?

Detailed Solution for Test : General Science - 1 - Question 18

- Poliomyelitis is an acute communicable disease of humans caused by a human enterovirus of the Picornaviridae family.
- Tetanus is an infection caused by bacteria called Clostridium tetani.
- Leprosy is a disfiguring disease caused by the Mycobacterium leprae bacteria.
- Plague is caused by the bacteria Yersinia pestis.

Test : General Science - 1 - Question 19

Contraction of heart is also known as -

Detailed Solution for Test : General Science - 1 - Question 19

Diastole is that part of the cardiac cycle during which the heart refills with blood after the emptying done during systole which is also known as contraction.

Test : General Science - 1 - Question 20

Azadirachta indica is the botanical name of which of the following?

Detailed Solution for Test : General Science - 1 - Question 20

Azadirachta indica is botanical name of neem. It is a multipurpose tree that is highly popular in India, where it provides food and insecticide, and is used for its great number of ethnomedicinal properties

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