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For the following questions answer them individually
What will be the drynessfraction for liquid ($$m_1$$) and vapour ($$m_2$$) mixture?
$$x = \frac{(m_1 + m_2)}{m_1}$$
$$x = \frac{(m_1 + m_2)}{m_2}$$
$$x = \frac{m_1}{m_1 + m_2}$$
$$x = \frac{m_2}{m_1 + m_2}$$
What is the amount of maximum work that can be extracted from a Carnot engine working between temperature 1000 K and 100 K?
0.1
0.5
0.9
0.99
When the degree of randomnessincreases, what is the change in entropy ?
Decreases
Increases
Unpredictable
Remains constant
For a heat pump, the second law ofefficiency can be written in the form ............
(First law efficiency) $$\times \left(1 - \frac{T_a}{T_o}\right)$$
(First law efficiency) $$\times \left(1 + \frac{T_o}{T_a}\right)$$
(First law efficiency) $$\times \left(1 - \frac{T_o}{T_a}\right)$$
(First law efficiency) $$\times \left(1 + \frac{T_a}{T_o}\right)$$
Which entropy value best defines the state of water at triple point?
Zero
More than zero
Less than zero
None of these
Which of the following cycle is used in compression ignition (SI) engine?
Carnot cycle
Diesel cycle
Dual cycle
Otto cycle
The self ignition temperature of diesel is ............ as comparedto that of petrol.
is higher
is lower
is same
cannot be determined
What happens when supercharging is done for spark ignition engines?
Increase knocking
Decrease knocking
No effect
May increase or decrease.
Which of the following factors does NOTcontribute towards detonation in an engine?
Engine overheating
High compression ratio
Stoichiometric fuel mixture
Wrong spark plug
Which of the substance cannot be classified as pure substance?
Chemical compounds
Humid air
Stainless steel
Water
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