Engineering

Name of the shape of the wings that enable to produce a lift force

• aerodynamic

• streamline air design

• airfoil

• air shaped

Which part of the body of the airplane can produce forces?

• both wings

• turbo engines

• the pilot

• the whole body of the airplane

The thing that causes the wings of the airplane to experience lift force

• water

• any particles

• air

• liquid

How the air can create the lift force on the wings?

• by producing friction

• by colliding with the wings

• conservation momentum between air and airplane

• Air turbulence that create uplift force

Why the momentum of the air change?

• the mass of the air change

• the direction of the air is opposite to the airplane

• the velocity of the air changes

• the constant speed of the air

What is true about the equal transit theory

• the particles of the air at the top and at the bottom of the wings will reach the same point at the same time

• The air at the top and the bottom of the wings has the same speed

• The pressure of the air at the bottom of the wings is bigger at the top of the wings

• all correct

In the car engine, what it means by "stroke"?

• increase in pressure of the

• decrease in pressure

• pressure fluctuation inside the cylinder

• the movement of the piston up and down

How many strokes it has for the car engine?

• 3

• 8

• 4

• 2

Its function is to trigger the combation

Why compression is needed before the combustion occurs?

• To produce spark

• To increase the temperature

• To produce flame

• To increase force