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

1 .

The word monsoon refers to

A)

blowing of wind swiftly

B)

changing direction of winds

C)

blowing of wind slowly

D)

blowing of wind in one direction always

Correct Answer : changing direction of winds

Monsoon regions. The monsoon broadly refers to an atmospheric phenomenon in which the mean surface wind reverses its direction from summer to winter. However, the monsoon is popularly used to denote the rains without reference to the winds. The term “monsoon” has its origin from an Arabic word meaning season.

2 .

Daisy wheel printer is a type of

A)

Laser printer

B)

Manual printer

C)

Impact printer

D)

Matrix printer

Correct Answer : Impact printer

A daisy-wheel printer works on the same principle as a ball-head typewriter. Daisy wheel printer is a type of impact printer invented in 1969.

The daisy wheel is a disk made of plastic or metal on which characters stand out in relief along the outer edge. To print a character, the printer rotates the disk until the desired letter is facing the paper.

3 .

The brain and spinal cord are two components of the

A)

Central nervous system

B)

Peripheral nervous system

C)

Both (a) & (b)

D)

None of the above

Correct Answer : Central nervous system

The brain and spinal cord are two components of the Central nervous system which are responsible for sensory information.

4 .

Soil erosion can be prevented by

A)

Overgrazing

B)

Removal of vegetation

C)

Afforestation

D)

Increasing bird population

Correct Answer : Afforestation

The four most common soil erosion prevention methods are vegetation, geotextiles, mulch, and retaining walls.

By planting grass in areas of concentrated water flow, farmers can prevent much of the soil erosion that results from runoff, as the grass stabilizes the soil while still providing an outlet for drainage.

Preventing soil erosion is critical in protecting your property and exposed soil, whether from wind, weather, running water, and even the after-effects of the forest fire.

5 .

Vision can be affected by drugs and alcohol making, especially difficult to distinguish

A)

Shapes

B)

Distance

C)

Light

D)

Colors

Correct Answer : Colors

Drinking alcohol can cause many damages to your body. Your vision can be affected as you will face blurred and double vision and even you can't identify colors.

6 .

Energy is measured in units called

A)

Watts

B)

Joules

C)

Newtons

D)

Ohm/mtr

Correct Answer : Joules

Energy is measured in units called Joules.

Joule is unit of work or energy in the International System of Units (SI) which is equal to the work done by a force of one newton acting through one metre.

1 Joule = 10â· ergs or 0.7377 foot-pounds.

7 .

Excessive use of which ofthe following fertilizers may be responsible for the presence of a toxic substance in groundwater?

A)

Phosphate and potassium

B)

Phosphate only

C)

Potassium only

D)

Nitrogen

Correct Answer : Nitrogen

Excessive use of nitrate including manure may be responsible forthe presence of toxic substance in groundwater. Phosphate can also enter the groundwater via excessive use of fertilizers. High application rates of nitrogen containing fertilizers combined with the high-water solubility of nitrate, leads to increased runoff into surface water as well as leaching into groundwater, thereby causing groundwater pollution.

Only a fraction of the nitrogen-based fertilizers, is converted to produce and other plant matter. Nitrate pollution in groundwater comes from pit latrines, it can cause blue baby syndrome.

8 .

The closest algal relatives of land plants are

A)

charophytes

B)

chrysophytes

C)

rhodophytes

D)

bacillariophytes

Correct Answer : charophytes

The charophytes are the extant group of green algae that are most closely related to modern land plants.

9 .

The concept of carbon credit originated from

A)

Earth Summit, Rio de Janeiro

B)

G-8 Summit, Hciligendamm

C)

Kyoto Protocol

D)

Montreal Protocol

Correct Answer : Kyoto Protocol

The concept of carbon credit for manufacturers originated with the Kyoto Agreement (Protocol) of 1997.

10 .

What molecule makes the trunk of a tree sturdy?

A)

Glucose

B)

Fructose

C)

Cellulose

D)

Disaccharide

Correct Answer : Cellulose

Cellulose is closely related to sugar and rated as a carbohydrate, which means that it is a compound of carbon, hydrogen and oxygen. The woody trunk of a tree is no more than dead cell walls.

Trunk of a tree refers to the main wooden axis of a tree that supports the branches and is supported by and directly attached to the roots. The molecule that makes it sturdy is cellulose.