Download AKTU B-Tech 4th Sem 2016-17 Fluid Machinery Question Paper

Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU) B-Tech 4th Semester (Fourth Semester) 2016-17 Fluid Machinery Question Paper

Printed Pagesz2 RollNo.I I I I I I I I I I I ME401
B.TECH.
THEORY EXAMINATION (SEM?IV) 2016-17
FLUID MACHINERY
T ime : 3 Hours Max. Marks : 100
Note .' Be precise in your answer. In case ofnumericalproblem assume data wherever not provided.
SECTION ? A
1. Explain the following: 10 x 2 = 20
(a) Torque converter
(b) Hydraullic Ram
(c) Hydraullic Accumulator
(d) Hydraullic Intensifier
(e) Air Lift Pump
(1) Priming
(g) Principle of Turbo?machine
(h) J et Pump
(i) Air vessels
(j) Slip, Negative slip
SECTION ? B
2. Attempt any ?ve parts of the following questions: 5 x 10 = 50
(a) Derive the expression of Euler?s equation and hence deuce the Bernoulli?s equation.
(b) A plate is acted upon at its center by a jet of water of diameter 20 mm with a velocity of
20 m/s. The plate is hinged and is de?ected through an angle of 15?. Find the weight of
the plate. 1f the plate is not allowed to swing, what will be the force required at the
lower edge of the plate to keep the plate in vertical position.
(c) Design a Pelton wheel for a head of 80 m and speed 300r.p.m. The Pelton wheel
develops 103 kW S.P. Take CV: 098, speed ratio = 0.45 and overall ef?ciency = 0.80.
(d) Derive the expression of maximum efficiency of Pelton Turbine.
(e) Explain with neat diagram Governing of Pelton Turbine.
(f) A lawn sprinkler with two nozzles of diameter 4 mm is connected across a tap of water.
The nozzles are at a distance of 30 cm and 20 cm from the center of the tap. The rate of
?ow water through the tap is 1200m3/s. the nozzles discharge water in the downward
direction. Determine the angular speed at which the sprinkler will rotate free.
(g) Draw all the characteristic curves for reaction turbines.
(h) A centrifugal pump having outer diameter equal to two times the inner diameter and
running at 1200r.p.m. works against a total head of 75 m. The velocity of ?ow through
the impeller is constant and equal to 3 m/s. The vanes are set back at an angle of 30? at
outlet. If the outer diameter of the impeller is 600 mm and width at outlet is 50 mm,
determine: (a) vane angle at inlet, (b) work done per second by impeller, (c)
manometric efficiency.
SECTION ? C
Attempt any two parts of the following questions: 2 x 15 = 30
3 An inward ?ow reaction turbine has an external diameter of 1 m and its breadth at inlet
is 200 mm. if the velocity of ?ow at inlet is 1.5 m/s, find the mass of water passing
through the turbine per second. Assume 15% of the area of ?ow is blocked by blade
thickness. If the speed of the runner is 200r.p.m. and guide blades make an angle of 15?

to the wheel tangent, draw the inlet velocity triangle and find: (I) The runner vane angle
at inlet (11) Velocity of wheel at inlet, (III) the absolute velocity of water leaving the
guide vanes, and (IV) the relative velocity of water entering the runner blade.
Discuss in detail the effect of acceleration and friction on indicator diagram.
A turbine is to operate under a head of 30 m at 300r.p.m. The discharge is 10m3/s. If the
ef?ciency is 90%, determine: (1) specific speed of the machine, (11) Power generated,
and (III) types of the turbine