152 Engines L1 L4

The internal combustion engine operate at what temperatures?

• 2,500°C

• 2,500°F

• 250°C

• 250°F

During the process of heat transfer, when heat transfers through a solid object it is known as?

• Conduction

• Convection

• Radiation

• Combustion

What is convection?

• Heat transfer through a liquid

• What you get in court

• Heat transfer through a solid

• Heat transfer through a space

Air cooled engines in cars are rarer because?

• Restrictions to body for air flow

• They freeze at low temperatures

• They boil at high temperatures

• The water pumps are inboard.

What happens to water at 32°F ?

• Ice crystals form, taking up more space

• Water begins to boil

• Vapour begins to bubble

• It mixes with oxygen in the air

Coolant has which properties over pure water?

• raised boiling point, lubricates, clears galleries, lowers freezing point

• raised freezing point, lubricates, clears galleries, lowers boiling point

• raised boiling point, lubricates, clears galleries, raises freezing point

• raised freezing point, lubricates, clears galleries, raises boiling point

If a radiator has an header tank at top and bottom of vanes it is called?

• upright

• crossflow

• convector

• conductor

What is fitted to an engine to aid warm up?

• Thermostat

• Thermister

• Thermometer

• Nice knitted coat

What system uses wax that has it expands it induces more grip.

• Viscous fan

• Vicious water pump

• Thermostat

• Electric fan

What is component pictured?

• Water pump

• Air cooling motor

• Air cooling pump

• Wheel hub