#1
Which force opposes the motion of a vehicle when it moves on a surface?
Frictional force
ExplanationFrictional force opposes motion by creating resistance between surfaces.
#2
Which component of a vehicle's drivetrain system is responsible for transmitting power to the wheels?
Transmission
ExplanationThe transmission transfers power from the engine to the wheels.
#3
What is the term for the force that resists the relative motion of one object sliding or rolling over another object?
Friction
ExplanationFriction opposes relative motion between objects.
#4
What is the term for the force that opposes the motion of an object sliding across a surface?
Sliding friction
ExplanationSliding friction acts against motion on surfaces.
#5
What is the term for the resistance to motion when one object rubs against another?
Friction
ExplanationFriction is the resistance to motion between contacting surfaces.
#6
Which type of friction is most desirable for vehicle tires to have good traction?
Static friction
ExplanationStatic friction provides better traction as it resists relative motion.
#7
Which factor affects the coefficient of friction between tires and road surface the most?
Road surface material
ExplanationThe material of the road surface significantly impacts friction coefficient.
#8
Which term describes the maximum frictional force that can be generated between two surfaces?
Limiting friction
ExplanationLimiting friction is the maximum force before sliding occurs.
#9
Which type of vehicle generally requires higher traction for safe operation?
Commercial trucks
ExplanationCommercial trucks need higher traction due to heavier loads.
#10
What effect does rain have on the coefficient of friction between tires and road surface?
Decreases friction
ExplanationRain decreases friction due to reduced surface grip.
#11
How does reducing tire pressure affect the traction of a vehicle?
Decreases traction
ExplanationReducing tire pressure reduces the contact area, decreasing traction.
#12
In which scenario does rolling friction play a significant role in vehicle operation?
Maintaining constant speed on a highway
ExplanationRolling friction is prominent in maintaining speed on flat surfaces.
#13
Which of the following materials typically provides the highest coefficient of friction on road surfaces?
Dry asphalt
ExplanationDry asphalt usually offers high friction coefficients for traction.
#14
Which factor has the greatest impact on the coefficient of friction between tires and a wet road surface?
Tire tread depth
ExplanationTire tread depth affects water dispersion and grip on wet roads.
#15
Which factor primarily determines the maximum angle at which a vehicle can safely ascend a slope without slipping?
Coefficient of friction
ExplanationFriction coefficient dictates slope ascent capability without slipping.