Tag: evs

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Multiple choice evs how to save fuel lpg, cng treasures from the earth fuel and conservation

The most common sources of energy are:

  1. wood and coal

  2. petroleum and coal

  3. LPG and cow dung

  4. natural gas and wood
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Fossil energy like coal, lignite, petroleum and natural gas are most common sources of energy. These sources of energy are used to produce electricity, cook food, heat thermal engines etc. 

Multiple choice evs how to save fuel lpg, cng treasures from the earth fuel and conservation

Cleaner fuel among the following is:

  1. petrol

  2. kerosene

  3. diesel

  4. compressed natural gas
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Compressed natural gas is a cleaner fuel because it causes less pollution by emitting lesser pollutants like carbon dioxide, nitrogen oxides, sulphur oxides, carbon monoxides, unburnt hydrocarbons etc.

Multiple choice evs how to save fuel lpg, cng treasures from the earth fuel and conservation

Secondary fuel among the following is:

  1. methanol

  2. water gas

  3. LPG

  4. all of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The artificial fuel which is made of chemical conversions or the fuel which we get by processing the primary fuel is called secondary fuel. Methane, water gas and LPG are secondary fuel.

Multiple choice evs how to save fuel lpg, cng treasures from the earth fuel and conservation

Nuclear fuel among the following is:

  1. uranium

  2. plutonium

  3. both A & B

  4. carbon
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Nuclear fuel is the one which store their energy in the form of nuclear energy and whose nuclei are unstable and undergoes fission.Uranium and plutonium are examples of nuclear fuel.

Multiple choice evs how to save fuel lpg, cng treasures from the earth fuel and conservation

Paraffin wax is a solid product obtained from petroleum. Some of its uses are mentioned here. Mark the wrong one?

  1. In greases for axles of motor vehicles

  2. As a coating on paper

  3. In the making of candles

  4. As a stiffening agent in cosmetic creams
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Fractional distillation of petroleum yields paraffin wax which is generally used to treat conditions like arthritis and fibromyalgia, as a coating on paper, in making candles; as a stiffening agent. 

It is not used as grease.

Multiple choice evs how to save fuel lpg, cng treasures from the earth fuel and conservation

Compared to oil, an advantage of using natural gas is that it:

  1. prevents respiratory problems

  2. prevents headaches

  3. causes less air pollution

  4. prevents over combustion
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Natural gas tops other fossil fuels when it comes to clean burning. Since the process of natural gas combustion is almost up to the mark, the level of byproducts disseminated to the environmental is little. In addition, advances in technologies have massively reduced nitrogen oxide, a common pollutant emitted by natural gas. The blue flame witnessed during the process of burning natural gas is an indication that the gas is burning perfectly.

Multiple choice evs how to save fuel lpg, cng treasures from the earth fuel and conservation

The engines of the rocket that helped the Apollo $11$ spacecraft to land on the moon, used for rocket fuel power.

  1. Hydrazine

  2. Hydrogen

  3. Oxygen

  4. Propane
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
 Hydrazine, $\left( {N} _{2}{H} _{4} \right)$
Substance used for launching rocket are called rocket propellant. 
A propellant have two part-
  1. fuel
  2. oxidiser
Liquid propellant: fuel and oxidiser both are liquid.
  • fuel (kerosene, ${N} _{2}{H} _{4}$, liquid ${H} _{2}$)
  • oxidiser($liq.{O} _{2}, \; {N} _{2}{O} _{4}$)
Multiple choice evs how to save fuel lpg, cng treasures from the earth fuel and conservation

Hydrogen gas is obtained from:

  1. petroleum

  2. coal

  3. coke

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

Fossil fuels are the dominant source of industrial hydrogen. Carbon dioxide can be separated from natural gas with a 60-70% efficiency for hydrogen production and from other hydrocarbons to varying degrees of efficiency.Specifically, bulk hydrogen is usually produced by the steam reforming of methane or natural gas.