Tag: how to save fuel

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Questions Related to how to save 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.

Multiple choice evs how to save fuel fuels fuel and effects of burning fuel study of combustion

_____ is any material that can be made to react so that it releases chemical or nuclear energy as heat.

  1. Fossil fuel

  2. Fuel

  3. Oil

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A fuel is any material that can be made to react so that it releases chemical or nuclear energy as heat or to be used for work. The heat energy released by reactions of fuels is converted into mechanical energy via a heat engine.

Multiple choice evs how to save fuel fuels fuel and effects of burning fuel study of combustion

What is an ideal fuel?

  1. It has high calorific value

  2. It is cheap

  3. It is readily combustible

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

An ideal fuel is cheap, readily available, easy to transport and readily combustible. It has high calorific value. It does not produce gases or residues that pollute environment.

Multiple choice evs how to save fuel fuels fuel and effects of burning fuel study of combustion

The ignition temperature of an ideal fuel should _____________.

  1. Lowest

  2. Highest

  3. Neither too high nor too low

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

Ideal fuel should have a proper ignition temperature, so that it can be burned easily. The ignition temperature of an ideal fuel should neither be too low nor too high. If the ignition temperature of the fuel is very low, then the fuel will catch fire too easily and hence it will be very unsafe to use it. On the other hand, if the ignition temperature is too high, then it will be very difficult to light the fuel.