**461. The equation of continuity is obtained by applying in the law of conservation of_____________?**

**A. Mass**

B. Energy

C. Momentum

D. All

**462. Velocity of fluid increases where the pressure is________________?**

**A. Low**

B. High

C. Constant

D. Changes continuously

**463. Speed of efflux can be determined by applying______________?**

A. Bernoulli’s theorem

**B. Torricelli’s theorem**

C. Venture relation

D. All

**464. Blood vessels are______________?**

A. Rigid

**B. Not rigid**

C. Of glass

D. Of rubber

**465. Concentration of red cells in blood is about______________?**

A. 25%

B. 40%

**C. 50%**

D. 75%

**466. A man standing near a fast moving train may fall___________?**

A. On the train

B. Away from the train

**C. Towards the train**

D. On himself

**467. For which position maximum blood pressure in the body have the smallest value ?**

A. Standing straight

B. Sitting on chair

C. Sitting on ground

**D. Laying horizontally**

**468. Two fog droplets have radius 2:3 their terminal velocities are_______________?**

A. 4:06

**B. 4:09**

C. 2:09

D. 4.3

**469. Bernoulli’s equation is obtained by applying the law of conservation of ________________?**

A. Mass

**B. Energy**

C. Momentum

D. Fluid

**470. Venturi meter is used to measure_________________?**

**A. Fluid pressure**

B. Fluid density

C. Fluid speed

D. None