Hydraulics MIIT

Examination hydraulics RUSSIAN UNIVERSITY OF TRANSPORT (MIIT) V-3

Task 1.1
To receive an additional volume of water resulting from its expansion during heating, expansion tanks connected to the atmosphere are connected to the water heating system at its upper point.
Determine the required volume of the expansion tank when heating water from 10 to.

Task 1.2
A rectangular rotary shield (Fig. 1) with a width of B = 4 m and a height of H closes the outlet of the dam. To the right of the shield is the water level Н1 to the left Н2, water density ρ = 1000 kg / m3.

Task 1.3
In fig. 1 shows a Venturi water meter (a pipe section with a smooth narrowing of the flow), designed to measure the flow rate of a fluid flowing through a pipeline.
Determine the flow rate if the difference in levels in the tubes of a differential mercury manometer, pipe diameter, neck diameter (narrowing). Loss of pressure in the water meter is neglected.

Task 1.4
Determine the pressure in the narrow section of the pipeline (Fig. 2.2, section 1-1) under the following conditions: the pressure in its wide part is equal to, the flow rate of water flowing through the pipeline, the diameters of the pipes of narrow and wide sections, respectively, and. The movement mode in the pipeline is turbulent. The pipeline is horizontal. Specific

Task 1.5
Determine the pressure loss over the length when moving through the pipe with a diameter of water and air with a flow at temperature.
Equivalent pipe roughness. How will these losses change with increasing temperature to?