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For the following questions answer them individually
In an isothermal process, the internal energy
always increases
always decreases
increases or decreases
remains constant
Which of the following is a boiler mounting ?
Safety valve
Economizer
Superheater
Feed pump
Which part of a petrol engine would need modifications if the engineis to be madeto run on LPG?
Piston
Crank shaft
Valves
Carburettor
The compression ratio for a practical diesel engineusually lies in the range
5-7
7-9
10-15
16-22
For a four-cylinder engine,the firing order for evennessof torque is
1-2-3-4
1-3-2-4
1-4-3-2
1-3-4-2
The drag coefficient is defined as
$$\frac{\left(\frac{F_D}{A}\right)}{\rho v_0^2}$$
$$\frac{\left(\frac{F_D}{A}\right)}{2 \rho v_0^2}$$
$$\frac{F_D}{(0.5 \rho v_0^2)}$$
$$\frac{F_D}{(0.5 \rho v_0^2 A)}$$
The length of the divergent portion of venturimeter in comparison to convergent portion is
same
more
less
depending upon the type of flow
The delay period in a petrol engine is of the order of
0.001 sec
0.002 sec
0.01 sec
0.05 sec
Octane number of iso-octane is
50
70
0
100
The silencer of an IC engine
reduces noise
decreases brake specific fuel consumption
increases brake specific fuel consumption
has no effect on efficiency
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