HEAT ENGINES

HEAT ENGINES

GRADE-9

JAN 6, 2021

Ms. Famin

answer in the chat section

lets begin

objectives

• Describe heat engine

• discuss the working of a heat engine

INTERPRET

What do you think is the energy transformation happening here?

HEAT ENGINES

A heat engine is a machine that converts thermal energy into mechanical energy

INTERPRET

Which energy is responsible for the vehicles to move?

internal combustion engine

video

INTERPRET

What type of energies did you identify in the working of a heat engine?

PREDICT

Do you think all thermal energy is converted into mechanical energy?

Multiple Choice

Which is NOT true of 2-stroke engines?

• Lighter

• More powerful

• Higher emissions

• Can operate at higher speeds

Multiple Choice

The _________ creates the spark to ignite the air/fuel mixture.

• spark plug

• glow plug

• flint

• striker

Multiple Choice

Which is the correct order of events in an engine?

• Intake, Power, Compression, Exhaust

• Intake, Power, Exhaust, Compression

• Intake, Compression, Power, Exhaust

• Intake, Exhaust, Power, Compression

Multiple Choice

The engine part that slides back in forth in a cylinder is the _____________.

• Valve

• Piston

• Crankshaft

• Camshaft

Multiple Choice

The bore in which a piston operates is the ________.

• Block

• Head

• Cylinder

• Valve train

Multiple Choice

An engine is a device that changes _________ energy in fuel to __________ energy.

• mechanical, chemical

• chemical, mechanical

• kinetic, chemical

• chemical, kinetic

Multiple Choice

Internal combustion engines use ___ energy to produce thermal energy.

• Electrical

• Chemical

• Mechanical

Multiple Choice

a device that is not efficient

• heating appliance

• thermostat

• refrigerator

• heat engine

Poll

How well did you understand the lesson?

• very well

• well

• not at all