1. using additives in the fuel
2. engine derating i.e. reducing the maxi-mum flow of fuel
3. increasing the compression ratio
4. adherence to proper fuel specification
increasing the compression ratio
1. higher
2. lower
3. remain unaffected
4. unpredictable
higher
1. supercharging reduces knocking in diesel engines
2. there can be limited supercharging in petrol engines because of detonation
3. supercharging at high altitudes is essential
4. supercharging results in fuel economy
supercharging results in fuel economy
1. equal to stroke volume
2. equal to stroke volume and clearance volume
3. less than stroke volume
4. more than stroke volume
less than stroke volume
1. increase efficiency
2. increase power
3. reduce weight and bulk for a given output
4. effect fuel economy
reduce weight and bulk for a given output
1. scavenging
2. turbulence
3. supercharging
4. pre-ignition
supercharging
1. diesel engines
2. gas turbines
3. petrol engines
4. aircraft engines
aircraft engines
1. half the operating speed
2. one-fourth of operating speed
3. 250-300rpm
4. 60-80rpm
60-80rpm
1. exhaust valve opens at 35° before bot-tom dead center and closes at 20° after top dead center
2. exhaust valve opens at bottom dead center and closes at top dead center
3. exhaust valve opens just after bottom dead center and closes just before top dead center
4. may open and close anywhere
exhaust valve opens at 35° before bot-tom dead center and closes at 20° after top dead center
1. minimum temperature to which1 oil is heated in order to give off inflammable vapors in sufficient quantity to ignite momentarily when brought in contact with a flame
2. temperature at which it solidifies or congeals
3. temperature at which it catches fire without external aid
4. indicated by 90% distillation temperature, i.e. when 90% of sample oil has distilled off
minimum temperature to which1 oil is heated in order to give off inflammable vapors in sufficient quantity to ignite momentarily when brought in contact with a flame