Maximum power that engine would produce for short period without overheating or excessive thermal stresses without engine accessories is called

1. rated engine power
2. nominal engine power
3. medium engine power
4. engine idling power

What is the main source of particulate matter emissions from engines?

1. Excessive use of fuel
2. Overuse of engine oil
3. High temperatures in the engine combustion chamber
4. Incomplete combustion of fuel

Engine volumetric efficiency is

1. ratio of fuel volume supplied to that theoretically needed
2. ratio of actual air induced into engine cylinder to that would be fill this cylinder
3. ratio of maximum cylinder volume to clearance volume
4. ratio of actual air-to-fuel ratio to the theoretical air-to-fuel ratio
5. all provided devices

 Fuel flow rate can be measured by

1. Orifice meter
2. Turbine meter
3. Rotameter
4. none of provided devices
5. all provided devices

 velocity of flame propagation in the SI engine is maximum for a fuel-air mixture which is

1. more than 10% richer than stoichiometric
2. equal to stoichiometric
3. about 10% richer than stoichiometric
4. 10% leaner than stoichiometric

Swirl can be generated during air induction into the cylinder by:

1. tangential flow entering into the cylinder
2. pre-swirling the incoming flow by use of helical ports
3. use of wedge shape cylinder head cavity or a bowl in the piston
4. all provided methods

Advantage of hydrogen as an IC engine fuel

1. no HC and CO emissions
2. low fuel cost
3. high volumetric efficiency
4. none of the mentioned

 Which of the following is the lightest and most volatile liquid fuel?

1. diesel
2. gasoline
3. kerosene
4. fuel oil