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FUEL AND COMBUSTION &ENERGY SOURCES AND STORAGE DEVICES

Total questions: 50

Worksheet time: 38mins

Name
Class
Date
1.
Which of the following fuel has highest calorific value?
a)
Wood
b)
coal
c)
Hydrogen
d)
petrol
2.
Which is not combustible substance
a)
Wood
b)
Cow dung cake
c)
stone
d)
paper
3.
In which form the colfloric value represent?
a)
(kJ/kg)
b)
gram
c)
kilogram 
d)
both 1 & 3
4.
What is produced when combustable substance is in the vapour state and burn strongly in the presence of of air?
a)
heat 
b)
light
c)
flame
d)
fumes
5.
The condition which are required for combustion to take place are:
a)
fuel
b)
ignition temperature
c)
oxygen
d)
all of these
6.
Another term for burning is
a)
Fire triangle
b)
Magnesium oxide
c)
Combustion
d)
Bustion
7.

The substances which have very low ignition temperature will

a)

(a) Catch fire easily

b)

(b) Will not catch fire

c)

(c) Catch fire after some time

d)

(d) None of these

8.

CNG and LPG are the examples of

a)

(a) Solid fuels

b)

(b) Liquid fuels

c)

(c) Gaseous fuels

d)

(d) They are not fuels

9.

Which of the following substances not required for combustion?

a)

(a) Oxygen

b)

(b) Carbon Dioxide

c)

(c) Fuel

d)

(d) Heat

10.
What is Combustion?
a)
When something is burned and light and heat energy are released
b)
When something evaporates
c)
When something is burned and carbon dioxide is released
d)
When something is burned and water vapour
11.

What does this hazard symbol warn of?

a)

The substance is explosive

b)

The substance burns easily

c)

The substance supplies oxygen to fires

d)

The substance puts out fires

12.

What does incomplete combustion produce that complete combustion doesn't?

a)

Carbon Monoxide

b)

Water

c)

Heat

d)

Carbon Dioxide

13.

Combustion is a

a)

Physical process

b)

Chemical process

c)

both A and B

d)

None of these

14.

An ideal fuel is cheap, readily available, easily combustible and easy to transport. It has high calorific value. It does not produce gases or residues that pollute the environment. Based on the above statements which of the following is closest to being an ideal fuel?

a)

Compressed Natural Gas (CNG)

b)

Kerosene

c)

Petrol

d)

Coal

15.

Incomplete combustion is harmful to humans because it ___________________.

a)

increases the level of sugar in the blood

b)

produces large amounts of carbon dioxide

c)

decreases the amount of sugar in the blood

d)

produces carbon monoxide that reduces the level of oxygen in the blood

16.

Hydrocarbons are fuels containing only:

a)

carbon and oxygen

b)

carbon and hydrogen

c)

carbon dioxide and hydrogen

d)

hydrogen and nitrogen

17.
How are metal oxides formed?
a)
When metals react with oxide.
b)
When metals react with water.
c)
When metals react with air.
d)
When metals react with oxygen.
18.
The rusting of iron is an example of
a)
a reduction reaction.
b)
an oxidation reaction.
c)
a reaction of iron with water.
d)
a reaction that dissolves iron.
19.
______ coal has the highest carbon content and a metallic luster in appearance.
a)
anthracite
b)
lignite
c)
sub-bituminous
d)
bituminous
20.

In analysis of coal, determination of _______ is done by Kjeldahl’s method.

a)

Volatile matter

b)

Nitrogen

c)

Ash

d)

Oxygen

21.

In determination of carbon and hydrogen by ultimate analysis, increase in weight of calcium chloride bulb represents ______

a)

weight of water formed

b)

weight of carbon dioxide formed

c)

carbon

d)

hydrogen

22.

Good quality of coal should have _____ % of oxygen.

a)

low

b)

high

c)

100

d)

0

23.

Percentage of ash by analysis of coal is given by _____

a)

(weight of sample – weight of residue) × 100

b)

(weight of sample – weight of residue)/weight of sample × 100

c)

(weight of residue/weight of sample) × 100

d)

(weight of residue – weight of sample) × 100

24.

In ultimate analysis, %hydrogen is given by __________

a)

(Increase in weight of CaCl2 tube×2×100 / weight of coal sample taken×18)

b)

(Increase in weight of KOH tube×2×100 / weight of coal sample taken×18)

c)

(Increase in weight of CaCl2 tube×4×100 / weight of coal sample taken×18)

d)

(Increase in weight of KOH tube×4×100 / weight of coal sample taken×18)

25.

__________ is the weight of residue obtained after burning a weighed amount of dry coal.

a)

Ash

b)

Volatile matter

c)

Moisture

d)

Carbon

26.

In proximate analysis of coal, %fixed carbon = __________

a)

b)

c)

d)

a)

100 – % (ash + volatile matter + moisture)

b)

100 – % (ash + moisture)

c)

100 – % (ash-moisture) + %volatile matter

d)

100 – % (moisture + volatile matter)

27.

Burning of which of the following fuels produce the least amount of carbon dioxide per unit of energy

a)

Coal

b)

Oil

c)

Natural gas

d)

All of these produce same amount of CO2

28.

Which of these are inexhaustible natural resources

a)

Sunlight

b)

Coal

c)

Wildlife

d)

Forest/ Minerals

29.

Full form of LPG

a)

Light petroleum gas

b)

Liquified petroleum gas

c)

Long pipe of gas

d)

Long petroleum gas

30.

...........the octane number, the more compression the fuel can withstand before detonating.

a)

Minimum

b)

Lower

c)

Higher

d)

Stable

31.

Fuels with a higher octane rating are used in high-performance ........... engines

a)

Petrol

b)

Gasoline

c)

Diesel

d)

CNG

32.

Fuels with lower octane numbers are ideal for ......... engines

a)

Gasoline

b)

Petrol

c)

Diesel

d)

CNG

33.

Cetane number is an indicator of the ...... speed of diesel fuel

a)

Engine

b)

Transmission

c)

Combustion

d)

Motor

34.

The .......... Number is an

important factor in determining the quality of diesel fuel

a)

Octane

b)

Cetane

c)

Cracking

d)

Combustion

35.
Takes two small nuclei and combines them into a larger nucleus
a)
fission
b)
fusion
36.
The splitting of a nucleus into smaller nuclei is
a)
fusion
b)
fission
c)
half-life
d)
gamma radiation
37.
How do nuclear power-plants work?
a)
Fusion
b)
Half-life
c)
Fission
d)
Fusion or fission
38.
Where does fusion occur naturally?
a)
Underwater
b)
All around us
c)
In the radioactive waste
d)
On the sun
39.
An example of an uncontrolled fission reaction is _______________
a)
Nuclear power plants
b)
Radio active decay
c)
Atomic Bomb
d)
On the surface of the sun
40.
_________ happens naturally due to an unstable nucleus.
a)
fission
b)
fusion
c)
radioactive decay
d)
K-capture
41.

The Law of Conservation of Energy states:

a)

Energy can created or destroyed but not transformed

b)

Energy cannot be created or destroyed, it can only transformed from one form to another form

c)

Energy can't be created, destroyed or transformed

d)

All the above

42.

Cons (Disadvantages) of using Solar Energy include:

SELECT ALL THAT APPLY

a)

It's Renewable

b)

Expensive to Install

c)

It is not a constant source of energy

d)

All the Above

43.

Wind is what type of energy?

a)

Renewable

b)

Non-Renewable

44.

Select the following Pros (Advantages) of using Wind Energy:

a)

Renewable

b)

It's a Green Energy

c)

Noise

d)

How they look

45.

What are the three basic parts of a cell

a)

Anode, load, depolarizer

b)

Electrodes, electrolyte, container

c)

Electrodes, acid, water

d)

Anode, cathode, ions

46.

With respect to recharging a primary or secondary cell, of the following statements, which one is correct?

a)

The secondary cell can be recharged by passing current through it in the proper direction

b)

The primary cell can only be recharged by changing the electrolyte

c)

The primary cell can be recharged by passing current through it in the proper direction

d)

The secondary cell can only be recharged by changing the electrodes

47.

What causes negative ions to be attracted to the cathode of a primary cell while the cell is discharging?

a)

A negative charge caused by a loss of electrons

b)

A positive charge caused by an excess of electrons

c)

A positive charge caused by a loss of electrons

d)

A negative charge caused by an excess of electrons

48.

The lead-acid cell is an example of which of the following types of cells

a)

The dry cell

b)

The primary cell

c)

The voltaic cell

d)

The secondary cell

49.

In a dry cell, what is the consistency of the electrolyte?

a)

Paste

b)

Solid

c)

Powder

d)

Liquid

50.

An example of a secondary cell is:

a)

A button cell

b)

An alkaline cell

c)

A fuel cell

d)

A car battery

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