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1. |
A. A single acting reciprocating pump, running at 60 r.p.m, delivers 0.01 m2/sec of water. The area of the piston is 0.05m2
and stroke length is 40 cm. Then theoretical discharge of the pump will be
(a) 0.015 m3/sec (b) 0.02 m3/sec
(c) 0.025 m3/sec (d) 0.03 m3/sec
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 : B |
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2. |
B. In question
(A), the co-efficient of discharge would be
(a) 0.9 (b) 0.8
(c) 0.6 (d) 0.5
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| : D |
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3. |
C. In question
(A), the slip of the pump would be
(a) 0.02 m3/sec (b) 0.01 m3/sec
(c) 0.005 m3/sec (d) 0.003 m3/sec
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| : B |
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4. |
The possibility of negative slip in reciprocating pump is
when
(a) delivery pipe is short (b) suction pipe is long
(c) pump is running at high speed (d) all of the above
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| : D |
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5. |
The slip in the reciprocating pump will be negative if
(a) Qth > Qact (b) Qth <
Qact
(c) Qth = Qact (d) none of the above
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| : B |
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6. |
Percentage Slip of a
reciprocating pump is equal to
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| : B |
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7. |
The power required to drive a single acting reciprocating
pump is equal to
(a) w.A.L.N / 4500 (b) w.A.L.N.(hs + hd)4500
(c) A.L.N. (hs + hd)/4500 (d) w.L.N/4500
where w = specific weight of water
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| : B |
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8. |
Slip of a
reciprocating pump is equal to
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| : C |
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9. |
The rate of flow of water through a double acting
reciprocating pump is equal to
(a) A.L.N /60 (b) 2 AL.N/60
(c) A.L.N./2×60 (d) 3 A.L.N./60
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| : B |
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10. |
The rate of flow of water through a single acting
reciprocating pump is equal to
(a) A.L.N /60 (b) 2 AL.N/60
(c) A.L.N./2×60 (d) 3 A.L.N./60
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| : A |
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11. |
The pump, which works on the principle of water hammer, is
known as
(a) centrifugal pump (b) reciprocating pump
(c) hydraulic ram (d) none of the above
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| : C |
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12. |
The pump which raises water without any external power for
its operation, is known as
(a) centrifugal pump (b) reciprocating pump
(c) hydraulic ram (d) hydraulic intensifier
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| : C |
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13. |
A.
The power at the shaft of a centrifugal pump is 100 KW, and
the power available at the impeller is 900 KW. If water horse power is 720 KW,
then overall efficiency of the centrifugal pump will be
(a) 90% (b) 80%
(c) 75% (d) 72%
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| : D |
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14. |
B.
In the question
(A), the manometric efficiency would be
(a) 90% (b) 80% (c) 75% (d) 72%
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| : B |
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15. |
C.
In question
(A), the mechanical efficiency would be
(a) 90% (b) 80%
(c) 75% (d) 72%
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| : A |
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16. |
The term W.Q.Hm / (75 S.H.P) for a centrifugal pump is known
as
(a) mechanical efficiency (b) manometric efficiency
(c) overall efficiency (d) none of the above
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| : C |
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17. |
If a circular chamber is introduced between the casing and
the impeller, then casing is known as
(a) vortex casing (b) volute casing
(c) casing with guide blades (d) none of the above
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| : A |
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18. |
The rotating part of a turbine is known as
(a) Impeller (b) Guide mechanism
(c) Runner (d) None of the above
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| : A |
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19. |
The rotating part of a turbine is known as
(a) Impeller (b) Guide mechanism
(c) Runner (d) None of the above
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| : C |
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20. |
In case of Kaplan turbine, velocity of flow at inlet is
(a) less than that at outlet
(b) more than that at outlet
(c) equal of that at outlet
(d) none of the above
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| : C |
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21. |
Francis turbine is a
(a) radially inward flow turbine
(b) radially outward flow turbine
(c) axial flow turbine
(d) none of the above
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| : A |
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22. |
The main advantage of the draft-tube is to convert
(a) pressure energy into kinetic energy
(b) kinetic energy into pressure energy
(c) pressure energy into electrical energy
(d) none of the above
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| : B |
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23. |
The pressure at the exist of the runner of a reaction turbine
is generally
(a) more than atmospheric pressure
(b) equal to atmospheric pressure
(c) less than atmospheric pressure
(d) none of the above
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| : C |
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24. |
In case of draft tube, are of cross-section of the draft tube
(a) increases from inlet to outlet
(b) decreases from inlet to outlet
(c) remains constant
(d) none of the above
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| : A |
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25. |
Draft tube is used in case of
(a) Pelton turbine (b) Pelton and Francis turbine
(c) Kaplan and Pelton turbine (d) Francis and Kaplan
turbine
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| : D |
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26. |
The pressure energy goes on changing into kinetic energy in case of
(a) Pelton turbine (b) Francis turbine
(c) Kaplan turbine (d) Francis and Kaplan
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| : D |
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27. |
A turbine is having specific speed of 400. Then the turbine
would be
(a) Kaplan turbine (b) Francis turbine
(c) Pelton turbine (d) None of the above
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| : A |
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28. |
A turbine is having specific speed as 100. Then the turbine
would be
(a) Kaplan turbine (b) Francis turbine
(c) Pelton turbine (d) Steam turbine
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| : B |
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29. |
The axial flow reaction turbine, in which vanes are fixed to
the hub and they are not adjustable, is known as
(a) Kaplan turbine (b) Francis turbine
(c) propeller turbine (d) Pelton turbine
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| : C |
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30. |
In case reaction turbine, the total head at the inlet of a
turbine consists of
(a) pressure energy and kinetic energy
(b) kinetic energy only
(c) pressure energy only
(d) none of the above
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| : A |
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31. |
In case of reaction turbine, the total head at the inlet of a
turbine consists of
(a) pressure energy and kinetic energy
(b) kinetic energy only
(c) pressure energy only
(d) none of the above
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| : B |
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32. |
Kaplan turbine is a
(a) reaction turbine (b) impulse turbine
(c) radial flow turbine (d) none of the above
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| : A |
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33. |
Francis turbine is a
(a) reaction turbine (b) impulse turbine
(c) axial flow turbine (d) none of the above
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| : A |
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34. |
Pelton turbine is a
(a) reaction turbine (b) radial inward flow turbine
(c) impulse turbine (d) axial flow turbine
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| : C |
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35. |
The power at the shaft of a turbine is 720 KW, power
developed by the runner of the turbine is 900 KW and the power supplied by the
water at the inlet of a turbine is 1000 KW. Then overall efficiency of the
turbine would be
(a) 60% (b) 72% (c) 80% (d) 90%
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| : B |
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36. |
The relation between
overall efficiency. mechanical efficiency and hydraulic efficiency is given by
(a) h0
= hmech
/ hhyd
(b) h0
= hmech
/ hhyd
(c) h0
= 1.0 / (hmech
× hhyd)
(d) h0
= hhyd
/ hmech
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| : B |
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37. |
The ratio of power at the shaft of a turbine to the power
supplied by water at inlet of a turbine is known as
(a) hydraulic efficiency (b) mechanical efficiency
(c) overall efficiency (d) none of the above
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| : C |
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38. |
The ratio of power available at the shaft of a turbine to the power
developed by the runner of the turbine is known as
(a) hydraulic efficiency (b) mechanical efficiency
(c) overall efficiency (d) volumetric efficiency
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| : B |
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39. |
Figure: Z3
for Questions
A, B & C
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40. |
A. A jet water of area of
cross-section 20 cm2, having a velocity of 20 m/sec strikes a curved
plate which is moving with a velocity of 10 m/sec in the direction of the jet.
The jet leaves the vane at an angle of 600 to the direction of motion
of vane at outlet as shown in Fig.
Z3. The relative velocity at inlet will be
(a) 20 m/sec (b) 10 m/sec (c) 15 m/sec (d) 16 m/sec
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| : B |
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41. |
B.
The velocity of whirl at inlet in the question (A), will be
(a) 20 m/sec (b) 16 m/sec
(c) 15 m/sec (d) 10 m/sec
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| : A |
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42. |
C.
In the FIG
Z3, angle
f will
be
(a) 300 (b) 450
(c) 600 (d) 750
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| : C |
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43. |
Figure: Z2
for Questions
A, B, C, D
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44. |
A.
In Fig
Z2 shows the
velocity triangles triangles at inlet and outlet of a turbine, V1
represents the absolute velocity at inlet and u1 represents vane
velocity at inlet. The relative velocity at inlet is represented by
(a) length BD (b) Length AD
(c) length CD (d) length CB
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| : D |
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45. |
57.
B. In
Fig.
Z2 the velocity of whirl at inlet is given by
(a) length DB (b) length AD
(c) length CD (d) length CB
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| : B |
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46. |
C. In fig. Z2, angle BAC is known as
(a) vane angle at inlet (b) nozzle angle at inlet
(c) vane angle at outlet (d) none of the above
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| : B |
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47. |
D. In fig.
Z2, angle BCD is known as
(a) vane angle at inlet (b) nozzle angle at inlet
(c) vane angle at outlet (d) none of the above
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| : A |
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48. |
In fig the angle
θ = 600, V = 10 m/sec and area of jet of water is 40 cm2. Then
the force on the curved plate in X-direction will be
(a) 600 N (b) 500 N
(c) 400 N (d) 300 N
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| : A |
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49. |
A jet water of area 40 cm2 moving with a velocity
of 10 m/sec strikes normally a fixed vertical plate. The force exerted by the jet
on the plate in the direction of jet will be
(a) 500 N (b) 400 N (c) 300 N (d) 200 N
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| : B |
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50. |
Pump is a machine which converts
(a) hydraulic energy to mechanical energy
(b) mechanical energy to hydraulic energy
(c) mechanical energy to electrical energy
(d) none of the above
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| : B |
