Tag: sources of energy

Quizzes (16) Questions (65)

Questions Related to sources of energy

Multiple choice physics sources of energy biomass and biogas biogas conventional sources of energy

State whether the given statement is True or False :
Cow-dung, crop residue, garbage and sewage are decomposed in the absence of oxygen to produce bio-gas.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Biogas is formed by anaerobic decomposition of the organic material such as sewage, plants and household waste, human and animal excreta etc.

Multiple choice physics sources of energy biomass and biogas biogas conventional sources of energy

Biogas plant is generally made of what?

  1. Bricks

  2. Wood

  3. Tiles

  4. Plaster of Paris
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Temperature inside the biogas increases tremendously during the anaerobic fermentation process. Out of the given options, brick is the suitable material to be used for the making of the biogas plants to withstand high temperatures.

Multiple choice physics sources of energy biomass and biogas biogas conventional sources of energy
Choose the correct statement(s):
(1) Sewage can be used with gobar and agricultural waste to produce bio gas in biogas plant.
(2) The largest composition in biofuel is of methane. 

  1. (1) only

  2. (2) only

  3. Both (1) and (2)

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Organic material is used as a substrate for the production of a biogas. Organic matters encompasses sewage, kitchen waste, animal and human excreta, etc.

Biofuel produced from biomass consists of methane, hydrogen, nitrogen etc. Largest component is of methane (50%-75%).

Multiple choice physics sources of energy biomass and biogas biogas conventional sources of energy

Wind with a velocity $72 km/hr$ blows normally against one of the walls of a house with an area of $100 m$ (density of air is $1.2 kgm^{-2}$)

  1. Force exerted on the wall if the air moves parallel to wall after striking is $48000 N$

  2. Force exerted on the wall if the air moves normal to the wall after striking is $96000 N$

  3. Force exerted on the wall is maximum if air moves parallel to the wall after striking

  4. Force exerted on the wall is maximum if air moves at certain angle with wall after striking
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice physics sources of energy biomass and biogas biogas conventional sources of energy

Which of the following is not a high wind-energy region of India?

  1. Bay of Bengal

  2. Gujarat

  3. The Arabian sea Islands

  4. Punjab
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Coastal regions like Gujarat, the Arabian Sea islands, and the Bay of Bengal have high wind potential due to consistent sea breezes. Punjab is an inland state and is not considered a high wind-energy region in India.

Multiple choice physics sources of energy biomass and biogas biogas conventional sources of energy

The output of a given windmill

  1. increases with an increase in wind velocity.

  2. decreases with an increase in wind velocity.

  3. is independent of wind velocity.

  4. cannot be determined
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Windmills convert the kinetic energy of wind into mechanical or electrical energy. Since kinetic energy is proportional to the square of velocity, the output increases as wind velocity increases.