Download PTU (I.K.Gujral Punjab Technical University (IKGPTU)) B-Tech (Bachelor of Technology) Mechanical Engineering 2020 December 6th Sem 71187 Fluid Machinery Previous Question Paper
Total No. of Pages : 02
Total No. of Questions : 18
B.Tech. (ME) (2012 Onwards) (Sem.?6)
FLUID MACHINERY
Subject Code : BTME-603
M.Code : 71187
Time : 3 Hrs. Max. Marks : 60
INST RUCT IONS T O CANDIDAT ES :
1 .
SECT ION-A is COMPULSORY cons is ting of TEN questions carrying TWO marks
each.
2 .
SECT ION-B c ontains F IVE questions c arrying FIVE marks eac h and s tud ents
have to atte mpt any FOUR q ues tions.
3 .
SECT ION-C contains THREE questions carrying T EN marks e ach and s tudents
have to atte mpt any T WO questio ns.
SECTION-A
Answer briefly :
1.
Classify the Hydraulic Turbine according to head of water.
2.
Define Overall Efficiency of Hydraulic Turbine.
3.
State disadvantages of a Francis turbine over a pelton wheel.
4.
What is a draft tube and state different types of draft tubes?
5.
What is function of surge tank?
6.
Define Priming in Pumps.
7.
State two functions of air-vessels.
8.
What is cavitation?
9.
State losses in centrifugal pump.
10. What is slip in reciprocating pump?
SECTION-B
11. Derive an equation for force exerted by jet on a curved plate tangentially.
12. Differentiate between Francis turbine and Kaplan turbine.
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13. An inward flow reaction turbine is supplied 0.233 m3/s of water under a head of 11 m. The
wheel vanes are radial at inlet and the inlet diameter is twice the outlet diameter. The
velocity of flow is constant and equal to 1.83 m/s. The wheel makes 370 rpm.
Determine :
a) Guide vane angle
b) Diameter of the wheel
c) Width of the wheel at inlet and outlet.
Assuming that the discharge is radial and there are no losses in wheel and speed ratio is 0.7.
14. A turbine is to operate under a head of 25 m at 200 rpm. The discharge is 9 m3/s. If the
efficiency is 90%, determine the performance of turbine under 20 m head.
15. Derive an expression for minimum starting speed for starting a centrifugal pump.
SECTION-C
16. A centrifugal pump impeller having external and internal diameters 480 mm and 240 mm
respectively is running at 100 rpm. The rate of flow through the pump is 0.0576 m3/s and
velocity of flow is constant at 2.4 m/s. The diameter of suction and delivery pipes are
180 mm and 120 mm respectively and, suction and delivery heads are 6.2 m (abs.) and
30.2 m of water respectively. If the power required to drive the pump is 23.3 kW and outlet
vane angle is 45 degree,
Determine :
a) Inlet vane angle
b) Manometric and overall efficiency of pump.
17. A acting reciprocating pump has a stroke length of 150 mm, suction pipe is 7 m long and
the ratio of suction pipe diameter to the piston diameter is 3/4. The water level in the sump
is 2.5 m below the axis of the pump cylinder and the pipe connecting the sump and pump
cylinder is 75 mm in diameter. If the crank is running at 75 rpm, determine the pressure
head on the piston at the beginning, middle and end of the suction stroke. Take f = 0.01.
18. a) Explain the working of hydraulic ram.
b) Discuss working and construction of torque converter.
NOTE : Disclosure of identity by writing mobile number or making passing request on any
page of Answer sheet will lead to UMC case against the Student.
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This post was last modified on 13 February 2021