Related Hydraulics and fluid mechanics MCQ with Answers
1000 cm3
We know that 1000 litre=1 m3=1,000,000 cm3,
So 1 litre=1,000,000/1,000=1000cm3.
![One litre of water occupies a volume of](https://mcqfinder.in/uploads/images/objective-questions/mechanical-set-1-hydraulics-and-fluid-mechanics/mechanical-set-1-hydraulics-and-fluid-mechanics-id-1-e.jpg)
Mach number
Bulk Modulus is a measure of the resistance of a fluid to compression. It is defined as the ratio of pressure stress to volumetric strain.
The value of bulk modulus of a fluid is required to determine Mach number. Mach number (M or Ma) is a dimensionless quantity. It represents the flow of velocity beyond the boundary when compared to the local speed of sound. It is used to determine the resistance of fluid or gas in its compressed state.
the pressure below the nappe is negative
In hydraulic engineering, a nappe is a sheet or curtain of water that flows over a weir or dam. There are three types of nappe that form over the crest of a weir, depending on the air ventilation structure of a weir: free nappes, depressed nappes, and clinging nappes. A free nappe, which is ventilated to maintain atmospheric pressure below, does not come into contact with the underside of the weir. A depressed nappe is partially ventilated, which creates negative pressure beneath the nappe. In a depressed nappe the pressure below the nappe is negative.
![In a depressed nappe](https://mcqfinder.in/uploads/images/objective-questions/mechanical-set-1-hydraulics-and-fluid-mechanics/mechanical-set-1-hydraulics-and-fluid-mechanics-id-3-e.jpg)
takes place in straight line
A flow, in which the streamlines of its moving particles are represented by a straight line, is called an one-dimensional flow.
![In one dimensional flow, the flow](https://mcqfinder.in/uploads/images/objective-questions/mechanical-set-1-hydraulics-and-fluid-mechanics/mechanical-set-1-hydraulics-and-fluid-mechanics-id-4-e.jpg)