WorksheetsSecond Law of thermodynamics
Total questions: 10
Worksheet time: 7mins
What is the name of a device that converts thermal energy into work?
Heating system
Heat engine
Refrigerator
entropy
The efficiency of this heat engine is
2.50
0.40
0.66
0.60
A refrigerator is
A heat engine
An air cooler
An electric motor
A heat engine working in the reverse order
The effeciency of heat engine cannot be 100% because
all heat energy absorbed is converted into work
some heat is rejected to the surroundings
workdone is greater than heat absorbed
none
The work available in a Carnot cycle is equal to
The area under the high temperature curve
the area under the low temperature curve
the area above the low temperature curve and below the high temperature curve
none
Which statements are true?
petrol engine do not need spark plug
The efficieny of diesel engine is more than petrol engine
Deisel engine need a spark plug
The compression ratio of diesel engine is greater than petrol engine
Write down the names of four stroke of petrol engine.
(a)
Which engine is in the figure?
diesel engine
carnot engine
petrol engine
Steam engine
Which statements are true?
In petrol engine,during combustion ,work is not done.
In diesel engine,during combustion,work is done
In internal combustion engine,the compression is adiabatic
In diesel engine ,air and diesel enter at the same time
In the figure,it is the
PV diagram of carnot engine
PV diagram of petrol engine
PV diagram of diesel engine
PV diagram of Refrigerator
