1.       Which one is a vector?

a.       Speed

b.      Momentum

c.       Power

​

2.       The first law of thermodynamics:

a.       Doesn’t apply to the shock wave phenomenon.

b.      Applies to ideal gases only.

c.       Is an extension of the conservation of mechanical energy.

​

​

3.       For optical fibers, the refractive index of the cladding compared to that of the core:

a.       Is always smaller.

b.      Is always larger.

c.       Can be either bigger or smaller depending on specification.

​

4.       A boy whose weight is 400N climbs up a 4m ladder in 5 seconds. What is his output power?

a.       400 / (5 x 4)

b.      (400 x 4) / 5

c.       (400 x 5) / 4

​

5.       Input gear has 20 teeth, the output gear has 120 teeth, when the input gear turns one cycle, the output gear will:

a.       Turn 60°

​

6.       Which is a correct statement about viscosity of fluids?

a.       Viscosity decreases with increasing temperature

b.      Dynamic viscosity is measured in centistokes

c.       Water is less viscous than methanol

​