Question

The total power developed by combustion of fuel in the combustion chamber is called:
1. brake power 
2. alternate power 
3. specific power
4. indicated power 

Answer 1

Correct Answer - Option 4 : indicated power 

Explanation:

Indicated Power:

• It is the power developed inside the engine cylinder.
• \(ip = \frac{{{p_m}LAN.n}}{{60}}\)

Brake Power:

• This is the actual power available at the crankshaft and may be called power output of the engine. It is always less than indicated power.
• \(BP = \frac{{2\pi NT}}{{60}}\)

Indicated thermal efficiency :

• It is the ratio of IP to fuel power.
• \({\eta _i} = \frac{{ip}}{{{{\dot m}_f} \times CV}}\)

Brake thermal efficiency :

• It is the ratio of bp to fuel power.
• \({\eta _b} = \frac{{bp}}{{{{\dot m}_f} \times CV}}\)