Download AKTU B-Tech 3rd Sem 2016-2017 NME 309 Thermal Hydraulic Machine Question Paper

Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU) B-Tech 3rd Semester (Third Semester) 2016-2017 NME 309 Thermal Hydraulic Machine Question Paper

Printed Pages: 3 V ? NME-309
(Following Paper ID and Roll N(Tto be ?lled in you;
Answer Books)
1 favor ll) : 2289938 Roll No.
B.TECH.
Regular Theory Examination (Odd Sem-III), 2016-17
THERMAL & HYDRAULIC MACHINE
Time : 3 Hours Max. Marks : I00
SECTION?A
l. Attempt all questions. (10xz=20)
a) Determine the enthalpy and entropy of wet steam
at 20 Bar and .9 dryness fraction?
b) Explain the reversible and irreversible processes.
c) State Zeroth law of thermodynamics.
d) What is energy equation?
e) Explain the reversible and irreversible processes.
f) What is Slip in Reciprocating pump?
g) De?ne Priming.
h) Write difference between impulse and reaction
turbine.
i) Draw PV & TS diagram of Diesel & dual cycle.
j) De?ne reheat factor.
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NME-309
SECTION - B
Attempt any ?ve questions. . (5X10=50)
Write short notes on the following : '
Thermodynamic properties, state, path, process, closed
system, isolated system, open system, extensive and
intensive properties.
State the Kelvin Planck and Clausius statements of 2nd
law of thermodynamics.
Steam at lObar pressure and .8 dryness fractions has been
generated by boiler. Make calculation for enthalpy.
Volume, entropy and intemal energy.
A reversible heat engine deliver .6KW power and rej ect
heat energy to reservoir at 300 K at the rate of 24 kj/min.
make calculation for the engine ef?ciency and temp. Of
the thermal reservior supplying heat to the engine.
Derive the expression for steady flow energy equation?
5 kg of steam at " 200 kPa occupies a volume of (i) 2.50m3
and (ii) 5.00 m3. Determine the temperature in each case
and quality of steam. ?
A jet of water having a velocity of 50 m/sec impinges
shock on a series of vanes moving at 15 m/s. The direction
of motion of the vane is inclined at 20" to that ofjet. The
relative velocity at outlet is 0.9 of that at inlet. The
absolute velocity of \v water at exit is to be nonnal to the
motion ofvanes. Determine : (i) Vane angles at inlet &
outlet (ii) Hydraulic ef?ciency.
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NME-309
A single acting reciprocating pump running at 50 rpm
delivers 0.00736 m3/s of water. 'I 'he diameter of the piston
is 200 mm and stroke length 300 mm. If suction &
delivery head are 3.5 m and l 1.5 m respectively. Calculate
(i)Theoretica1 discharge (ii) % of slip ot?the pump
SECTION - C
Attempt any two questions. (2 X15=30)
A system containing 0.25 m3ot?air at a pressure of 4 bar
and 150 'C expands isentropically to a pressure of 1 bar
and after this the gas is heated at constant pressure till
the enthalpy increases by 60 kJ. Calculate the work done
if theSe processes are replaced by a single reversible
polytrophic process producing the same work between
initial and ?nal states, ?nd the index of expansion. Take
Cp: 1.G05 kJ/kgK of air.
Discuss the main components of F ancies Turbine with
reference to working of Turbine.
A regenerative cycle with three blade heating works
between 30 bar, 45?C and 0.04 bar" The bleed
temperature are chosen at equal temperature range.
Determine the ef?ciency of the cycle. Neglect the pump
work.
W
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