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Heat Class 7 MCQ Online Test. We covered all the Heat Class 7 MCQ Online Test in this post so that you can practice well for the exam.
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Heat Class 7 MCQ Online Test for Students
Which state of matter shows the greatest expansion?
a. Solid
b. Liquid
c. Gas
d. Fuel
Option c – Gas
The quantity of heat gained or lost depends on
a. The object’s mass and temperature change
b. The density and pressure of the substance
c. Mass, specific heat, and density
d. All of the above
Option a – The object’s mass and temperature change
One calorie is equal to
a. 1.418 J
b. 41.8 J
c. 0.418 J
d. 4.18 J
Option d – 4.18 J
Specific heat capacity is influenced by
a. The type of substance
b. The initial temperature
c. The final temperature
d. The object’s mass
Option a – The type of substance
The specific heat and calorific value of a material are
a. Identical
b. Always different
c. Not directly comparable
d. None of the above
Option c – Not directly comparable
The energy released when a specific mass of fuel is burned is known as
a. Calorific value
b. Specific heat
c. Combustion heat
d. All of these
Option a – Calorific value
To convert specific heat from C.G.S. to S.I. units, multiply by
a. 4.18
b. 41.8
c. 0.418
d. 3.17
Option a – 4.18
A thermostat functions based on the principle of
a. Calorimetry
b. Bomb calorimetry
c. Bimetallic strip action
d. Thermometry
Option c – Bimetallic strip action
Thermostats are commonly found in
a. Electric irons
b. Cooling appliances
c. Fire alarm systems
d. All of the above
Option d – All of the above
A bomb calorimeter is used to determine the energy content of
a. Only fuels
b. Only food items
c. Both fuels and food
d. Neither
Option c – Both fuels and food
In the C.G.S. system, the unit of heat is
a. Joule
b. Calorie
c. Erg
d. Degree Celsius
Option b – Calorie
The device specifically used for measuring the calorific value of a fuel is
a. Thermometer
b. Thermostat
c. Bomb calorimeter
d. Simple calorimeter
Option c – Bomb calorimeter
The heat taken in by an object is directly related to
a. Its mass
b. The temperature rise
c. Both mass and temperature change
d. None of these
Option c – Both mass and temperature change
The principle behind the method of mixtures is known as
a. Bomb calorimetry
b. Calorimetry
c. Specific heat theory
d. Latent heat
Option b – Calorimetry
The rate of linear expansion for every 1°C rise in temperature is called the
a. Real expansion coefficient
b. Cubical expansion coefficient
c. Linear expansion coefficient
d. All of the above
Option c – Linear expansion coefficient
The energy content in food and fuel is measured using a
a. Calorimeter
b. Bomb calorimeter
c. Thermometer
d. Thermostat
Option b – Bomb calorimeter
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