Water Resources Engineering MCQ with Answers

16) Specific weight of water in S.I. units is equal to

Answer is:

9.81 x 10³ N/m³

Explanation:

Weight density or specific weight is defined as the weight per unit volume of a liquid at a standard temperature and pressure. Weight density or specific weight is usually denoted by w. Weight density or specific weight is expressed in kN/m³ or N/m³ or N/mm³.

Mathematically, weight density or specific weight,
w = ρ.g

Note: For water, w = 9.81 kN/m³ = 9.81 x 10³ N/m³ = 9.81 x 10^-6N/mm³.

17) When the flow parameters at any given instant remain same at every point, then flow is said to be

Answer is:

uniform

18) Which of the following is demensionless

Answer is:

specific gravity

19) The normal stress in a fluid will be constant in all directions at a point only if

Answer is:

it is at rest.

20) The pressure at a point in a fluid will not be same in all the directions when the fluid is

Answer is:

16) Specific weight of water in S.I. units is equal to

9.81 x 103 N/m3

17) When the flow parameters at any given instant remain same at every point, then flow is said to be

uniform

18) Which of the following is demensionless

specific gravity

19) The normal stress in a fluid will be constant in all directions at a point only if

it is at rest.

20) The pressure at a point in a fluid will not be same in all the directions when the fluid is

viscous and moving.

9.81 x 10³ N/m³