Practice Horizontal Water Jet Impact Problem (21.2.2)

Practise this section

8 questions

Flashcard drill
2 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
2 questions · about 1 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
What is the beta factor for laminar flow?
Show hintHide hint
Consider the typical value used in calculations.
Question 2.
Define momentum flux.
Show hintHide hint
Think about momentum per unit area per time.
3Question 3.
What is the beta factor for laminar flow?
- 1
- 1/2
- 1/3
Show hintHide hint
Think of the ratio of actual to average velocities.
4Question 4.
In turbulent flow, the velocity distribution is typically:
- True
- False
Show hintHide hint
Consider how turbulence affects flow speed.
Question 5.
A jet of water strikes a vertical flat plate with a velocity of 15 m/s and a height of 2m. Calculate the total momentum exerted by the water on the plate per second.
Show hintHide hint
Set up the flow area and consider that momentum will be affected by both height and speed.
Question 6.
How would the required force to hold a sluice gate change if the water height increases from 5m to 8m, while keeping velocity constant? Calculate the new force.
Show hintHide hint
Pressure increases with height; recalculate using hydrostatic pressure principles.

4 more questions in this section. Enroll free to practise them all.