Latest Science and Technology General Knowledge(GK) Questions and answers

1 .

Which of the following has the highest ionizing power

A)

Alpha rays

B)

Beta rays

C)

Gamma rays

D)

X-rays

Correct Answer : Alpha rays

Alpha particles have approximately four times the mass of a proton or neutron and approximately 8,000 times the mass of a beta particle. Because of the large mass of the alpha particle, it has the highest ionizing power and the greatest ability to damage tissue.

2 .

Which of the following devices is used to record humidity

A)

Hygrometer

B)

Psychrometer

C)

Thermo-hygrograph

D)

All of the above

Correct Answer : All of the above

3 .

Which one of the following fuels causes minimum environmental pollution

A)

Kerosene

B)

Hydrogen

C)

Diesel

D)

Coal

Correct Answer : Hydrogen

4 .

The full form of MRI is

A)

Magnetic Record of Intestines

B)

Magnetic Resonance in Intestines

C)

Magnetic Resonance Imaging

D)

Magnetic Recording of Investigations

Correct Answer : Magnetic Resonance Imaging

5 .

"Tsunami" is the name given to which of the following?

A)

Earthquake

B)

Tidal Waves

C)

Cyclone

D)

Undersea Waves

Correct Answer : Tidal Waves

6 .

The core of the earth is also known as

A)

Barysphere

B)

Centrosphere

C)

Mesosphere

D)

Lithosphere

Correct Answer : Barysphere

The inner most layer of the earth is called the “Core or Barysphere”. It is otherwise known as NIFE, because of the presence of Nickel and Ferrous (iron). This layer produces earth's magnetic field.

7 .

Name the scientist who proposed the cell theory

A)

Lamarck

B)

Treviranus

C)

Whittaker and Stanley

D)

Schleiden and Schwann

Correct Answer : Schleiden and Schwann

The classical cell theory was proposed by Theodor Schwann in 1839. There are three parts to this theory. The first part states that all organisms are made of cells.

8 .

"Sirius", the brightest star outside solar system, is also called

A)

Cat star

B)

Dog star

C)

Lion star

D)

Fox star

Correct Answer : Dog star

9 .

Weight of an object on the moon is ............ the weight of the object on earth.

A)

1/2

B)

1/4

C)

1/6

D)

equal to

Correct Answer : 1/6

Hence, the weight of an object on the moon is 1/6th its weight on the earth.

10 .

If a star is bigger than Sun, but not more than twice as big, it will turn into a

A)

Maxima

B)

Discover

C)

Pulsar

D)

Avenger

Correct Answer : Pulsar