MCQS on Hydraulic brake

Hydraulic Brake System – Quiz

1. What is the primary function of the brake pedal in a hydraulic braking system?

A. To rotate the wheels B. To apply mechanical force to generate pressure in fluid C. To cool down the brake shoes D. To reduce tire wear

2. Why is oil used instead of air in hydraulic brake systems?

A. Oil is cheaper B. Oil generates more heat C. Oil is incompressible and transmits pressure efficiently D. Oil helps in tire rotation

3. What is the function of the main cylinder in the hydraulic system?

A. It stores water for cooling B. It develops hydraulic pressure by receiving force from the pedal C. It rotates the wheel D. It filters brake fluid

4. When the brake pedal is pressed, how does braking actually occur?

A. Wheels stop due to friction in the pedal B. Oil returns to the reservoir, causing resistance C. Fluid pressure pushes pistons to move brake shoes outward D. Pedal turns the wheel cylinder clockwise

5. What causes brake shoes to press against the wheel rim?

A. Gravity pulls them out B. Heat expansion C. Hydraulic pressure from the fluid pushes pistons outward D. Spring compression releases tension

6. Why does air in the brake system reduce its efficiency?

A. Air makes the brakes harder B. Air causes more oil to leak C. Air is compressible, reducing pressure transmission D. Air cools the system too quickly

7. On what principle does a hydraulic brake system operate?

A. Pascal’s Law B. Newton’s Second Law C. Archimedes’ Principle D. Bernoulli’s Principle

8. What is the mechanical advantage (M.A.) of a hydraulic machine defined as?

A. Effort / Load B. Load / Effort C. Radius / Diameter D. Area / Volume

9. If the area of the output piston is 10 times that of the input piston, what is the theoretical mechanical advantage?

A. 10 B. 1 C. 100 D. 0.1

10. Velocity Ratio (V.R.) in a hydraulic press is given by:

A. Distance moved by effort / Distance moved by load B. Load force / Effort force C. Load x Distance / Time D. Force / Area