Prelims MCQs Quiz 24 : Science


1. Swine flu can be transmitted by
1. shaking hands with an infected person.
2. inhaling droplets of virus from sneeze of an infected person.
3. eating pork products.
Select the correct answer using the codes given below.
a) 1 and 2 only
b) 2 only
c) 2 and 3 only
d) 1 and 3 only

Answer & Explanation

2. Lifestyle diseases are associated with the way a person or group of people lives. Which of the following is/are example/s of such diseases?
1. Cirrhosis
2. Malaria
3. Swimmer’s ear
4. TB
Select the correct answer using the codes given below.
a) 1 and 2 only
b) 1 and 3 only
c) 2 and 3 only
d) 1 and 4 only

Answer & Explanation

3. Two layers of a cloth of equal thickness provide warmer covering than a single layer of cloth with double the thickness. This is because
a) air gets encapsulated between the two layers.
b) effective thickness of two layers is more
c) air is a bad conductor of heat
d) both (a) and (c)

Answer & Explanation

4. Formation of colors in a soap bubble is due to:
1. diffraction of light
2. interference of light
3. dispersion of light
Select the correct answer using the codes given below.
a) 1 and 2 only
b) 2 only
c) 2 and 3 only
d) 1 and 3 only

Answer & Explanation

5. The filament of electric bulb is generally made of tungsten because
1. tungsten has high light emitting power.
2. tungsten has high melting point.
3. tungsten is cheap compared to other similar elements.
Select the correct answer using the codes given below.
a) 1 and 2 only
b) 2 only
c) 2 and 3 only
d) 1 and 3 only

Answer & Explanation

6. Artificial blood is a product made to act as a substitute for real blood. Which component of the blood does an artificial blood mimic?
1. RBC
2. WBC
3. Platelet
Select the correct answer using the codes given below.
a) 1 only
b) 1 and 2 only
c) 2 and 3 only
d) 1, 2 and 3

Answer & Explanation

7. With reference to tube-lights, consider the following statements :
1. It works on the principle of fluorescence to produce visible light.
2. White lime coating is done inside the tube to produce white light.
Which of the statements given above is/are correct ?
a) 1 only
b) 2 only
c) Both 1 and 2
d) Neither 1 nor 2

Answer & Explanation

8. Fasting has been an essential component of lifestyle in India. During fasting, in which order is the following energy sources used?
1. Proteins
2. Fats
3. Carbohydrates
a) 1 > 2 > 3
b) 1 > 3 > 2
c) 3 > 2 > 1
d) 3 > 1 > 2

Answer & Explanation

9. AMOLED screens are now increasingly used in mobile phones. They offer the following advantages
1. they use an organic electroluminescent material.
2. they can be viewed even in direct sunlight.
3. they have higher refresh rates that improves the quality of display.
Select the correct answer using the codes given below.
a) 1 and 2 only
b) 1 and 3 only
c) 2 and 3 only
d) 1, 2 and 3

Answer & Explanation

10. In robotics technology, the ‘actuator’ is used for
a) providing movement
b) balancing the robot
c) receive information about a certain measurement of the environment
d) None of the above

Answer & Explanation

 

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Please read these important articles about prelims preparation

1. How UPSC asks current affairs in GS Prelims

2. How to practice prelims MCQs for UPSC

3. Applying logic in UPSC General Studies Prelims

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