Fluid Pressure MCQ: Laws, Formulas & Applications

Pressure in Fluids MCQ Quiz

Question 1 of 10

1. What is the SI unit of pressure?

Newton Pascal Joule Watt

2. The pressure at a depth h in a liquid is given by:

P = h/gρ P = hρg P = ρg/h P = hρ/g

3. Why are dams constructed with broader bases?

To reduce construction costs To withstand increasing pressure with depth To make them look more aesthetic To provide space for fish to swim

4. Which principle explains hydraulic lifts?

Bernoulli's principle Archimedes' principle Pascal's principle Newton's third law

5. What happens to atmospheric pressure as altitude increases?

Increases Decreases Remains constant First increases then decreases

6. Which of these devices uses atmospheric pressure? (Select all that apply)

Barometer Drinking straw Hydraulic brake Suction cup

7. If the area of a hydraulic lift's small piston is 0.01 m² and the large piston is 0.1 m², what force on the small piston can lift 1000 N on the large piston?

10 N 100 N 1000 N 10,000 N

8. What is the approximate atmospheric pressure at sea level?

10,000 Pa 101,325 Pa 1,013,250 Pa 101.325 kPa

9. Which of these is NOT a consequence of P = hρg?

Dams are thicker at the bottom Divers experience more pressure at greater depths Water pressure decreases with depth Submarines need strong hulls

10. How does atmospheric pressure help in weather forecasting?

High pressure usually indicates fair weather Low pressure often indicates storms Rapid pressure drops suggest approaching bad weather All of the above

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