Level 3 Automotive General

What does the gradient of a velocity -time graph show?

• Time

• Acceleration

• Speed

• velocity

Which statistical value can be described as the most common value.

• Divider

• Range

• median

• Mode

How is torque calculated

• Power times speed

• Force times radius

• Force times distance

• Power divided by effort

What do frictional forces depend on?

• Area x radius

• Frictional force

• Contact force and pressure

• Contact force and coefficient of friction

Which of the following would result in a shorter stopping distance?

• Increased retarding force

• Decreased vehicle mass

• Decreased vehicle velocity

• All of the above

a fixed amount of gas is forced into a smaller volume . what could be observed.?

• Pressure will increase

• Temperature will increase

• Both the above

• None

What characteristic of a material could it have if it had a high Young,s Modulus.?

• Conductive

• Resists bending

• It cannot bend

• The material is resistant to deformation

Two of the angles of a triangle are 42° and 40°. The sides of the triangle opposite these angles are 1.2m and 1.4m respectively. Explain why the missing length cannot be found using trigonometric ratios (sin, cos, tan) alone.

• The trigonometric ratios do not work on triangles of this type – the third angle is 98°, therefore the triangle is not a right angle triangle

• Trignometric angles need obtuse input

• Right angled triangles are square

• Use Pythagorous

Which of these best describes what a dynamometer does?

• calculates effort

• Calculates speed

• Measures speed and power

• Measures engine torque and power

Which of these depends on engine revolution speed?

• Speed

• Engine power

• Velcrum effect

• Torsion blow back