Question 1:

According to Bernoulli's equation, an increase in the speed of a fluid flow is accompanied by a:

Explanation: The correct answer is A) Decrease in pressure. According to Bernoulli's equation, an increase in the speed of a fluid flow is accompanied by a decrease in pressure. This is known as the Bernoulli principle and is based on the conservation of energy in a flowing fluid.

Question 2:

The viscosity of a fluid refers to its:

Explanation: The correct answer is A) Resistance to flow. Viscosity refers to a fluid's resistance to flow. It is a measure of the internal friction within a fluid and determines how easily it flows. Fluids with high viscosity, such as honey, flow more slowly than fluids with low viscosity, such as water.

Question 3:

Which of the following factors affects the viscosity of a fluid?

Explanation: The correct answer is D) All of the above. The viscosity of a fluid is affected by factors such as temperature, pressure, and the type of fluid. Generally, an increase in temperature leads to a decrease in viscosity, while an increase in pressure can either increase or decrease viscosity depending on the specific fluid. Different fluids also have different inherent viscosities.

Question 4:

The Bernoulli equation is based on the principle of conservation of:

Explanation: The correct answer is B) Energy. The Bernoulli equation is based on the principle of conservation of energy in a fluid flow. It states that the total mechanical energy of a fluid is conserved along a streamline, meaning that the sum of the pressure energy, kinetic energy, and potential energy per unit volume remains constant.

Question 5:

According to Bernoulli's equation, when the velocity of a fluid flow increases, the pressure:

Explanation: The correct answer is A) Decreases. According to Bernoulli's equation, when the velocity of a fluid flow increases, the pressure decreases. This is because an increase in velocity is associated with a decrease in the static pressure, as the energy is transferred from the pressure energy to kinetic energy of the fluid.