Sci/Tech Quiz, 06 September 2018

Bluetooth and Wi-Fi are two standards for wireless communication. With respect to the difference between the two, which of the following is/are correct?

1. Bluetooth is more secure than Wi-Fi.

2. While Bluetooth works at 2.45 GHz Wi-Fi works at 1.8 GHz.

3. Bluetooth consumes less power than Wi-Fi.

Select the correct answer using the codes given below.

Water disinfectants used to kill or deactivate pathogenic microorganisms. Which among the following can be used as a disinfectant?

1. Chlorine

2. Hydrogen peroxide

3. Ultraviolet rays

Select the correct answer using the codes given below.

Kessler syndrome is

Reusing cooking oil is unhealthy because

Aluminium has been used in aircrafts because it offers many advantages. These are

1. excellent machinability and plasticity which helps in bending, cutting, and drawing aluminium sheets.

2. high thermal resistance making it suitable for use in engines which are exposed to extreme heat.

3. ability to withstand the stresses that occur during launch and operation in space.

Select the correct answer using the codes given below.

Which of the following Indian NGOs has bagged UN award for clean energy project?

Which of the following countries first in the world to ban disposable plastic cups and plates?

U. R. Rao, the former ISRO Chairman, recently has been inducted into the Hall of Fame by which of the following organisation?

Which of the following scientists has been awarded with 2016 Nobel Prize in Medicine for his discoveries of mechanisms for autophagy?

Consider the following statements:

If there were no phenomenon of capillarity.

1. it would be difficult to use a kerosene lamp.

2. one would not be able to use a straw to consume a soft drink.

3. the blotting paper would fail to function.

4. the big trees that we see around would not have grown on the Earth.

Which of the statements given above are correct?