B.TECH - Semester 4 fluid mechanics 2 Question Paper 2021 (dec)
Practice authentic previous year university questions for better exam preparation.
Sample Questions
- All questions under Part A are sempulsery.
- Answer any one full question Irmm each mocule under Part E.
- (a) Derive Chezy's formula for uniform flow.
- (b) Prove that for a given discharge specilic energy in open channel is minimum al critical deplh.
- (c) List the different uses of hydraulic jump. How are jumps classified?
- (d) With sketches, explain different types of profiles in sleep sloped channels.
- (e) State Reynolds model law and Froude's model law.
- (f) Define (i) Slip (ii) negalive slip (iii) Coellicient of discharge (9) Explain the purposes of drail lube. What are the types of draff lubes?
- (h) Deline specific speed of turbines and derive an expression for the same. $$ (0 \times 5=40 \text { Marks }) $$
- (a) Deline most efficient channel section, Derive the condition for maximum velocily and maximum discharge through circular section.
- (b) The depth of flow of water at a cerlain section of a reclangular channel of 2 m wide is 0.3 m . The discharge through the channel is $1.5 \mathrm{~m}^{3} / \mathrm{s}$. Delermine whether a hydraulic jump will occur and if so find the height and l...
- (a) Derive an expression for energy loss due lo hydraulic jump in a horizontal rectangular channel.
- (b) A reclangular charnel with bottom slope of 0.0064 is lo carry $20 \mathrm{~m}^{3} / \mathrm{sec}$ of waler. Determine the width of the channel when the Now is in crilical condition. Take $n=0,015$.
- (a) Explain momentum equation for sleady flow.
- (b) A1:50 spillway model has a discharge of $1.25 \mathrm{~m}^{3 / \mathrm{s}}$. What is the corresponding prolotype discharge? If a flood phenomenon lakes 12 hours to occur in the prolotype how long should it take in the madel?
- (a) Using Buckingham 11 theorem show that velocily lhrough circular onfice of diameter $d$ is given by $v=\sqrt{2} g h \cdot h\left[\left(\frac{d}{h}\right)\left(\frac{\mu}{\rho v h}\right)\right]$ where $h$ - head causing flow. $p$-coefficient of vi...
- (b) Waler is flowing in a stream 10 m wide and a bed slope of 1 in 2000 at a depth of 1 m . A dam is placed across the stream raising the depth to 2 m . How sar upsiream will the depth be 1.5 m ? udentify the surface profile also. Take $n=0.015$. 5 ...
- (b) Whal is an indicator diagram. Explain with the indicator diagram, work saved by air vessels in a reciprocaling pump.
- (a) Derive the expression for the Torque exerted and work done when a jel of waler strikes radially on a series of vanes mounled on a wheel.
- (b) A cenlrifugal pump is running at 1000 rpm . The oullel vane angle of the impeller is $45^{\circ}$ and velocity of now al outlel is $2.5 \mathrm{~m} / \mathrm{s}$. The discharge larough the pump is 200 litres/s when the pump is working against a l...