Posted by Vishnu on August 9th, 2011 11:57 PM | 12 Comments 341. Kaplan turbine is a propeller turbine in which the vanes fixed on the hub are
(a) non-adjustable (b) adjustable
(c) fixed (d) none of the above
342. If the head on the turbine is more than 300 m, the type of ...
Posted by Vishnu on August 9th, 2011 11:55 PM | 22 Comments 331. The work saved bv fitting an air vessel to a double acting reciprocating pump is
(a) 39.2%
(b) 84.8%
(c) 48.8%
(d) 92.3%
332. The pressure, at which separation takes place, is known separa¬tion pressure or separation pressure head. For water, the limiting value ...
Posted by Vishnu on August 9th, 2011 11:54 PM | 11 Comments 320. The operating characteristic curves of a centrifugal pump are shown in Fig. 1.5.
Curve A is for
(а) Head
(b) Efficiency
(c). Power
(d). None of the above.
321.Curve B in Fig. 1.5 is for
(а) Head
(b) Efficiency
(c). Power
(d). None of the above.
322. Curve B in ...
Posted by Vishnu on August 9th, 2011 11:52 PM | 27 Comments 311. Governing of a turbine means
a. the head is kept constant under all condition of working
b. the speed is kept constant under all conditions
c. the discharge is kept constant under all conditions
d. none of the above.
312. The work done by ...
Posted by Vishnu on August 9th, 2011 11:51 PM | 18 Comments 301. The unit speed (Nu) is given by the expression
a.Nu = N / H 3/2
b. Nu =N / H ¾
c. Nu = N / √ H
d. Nu = N / H5/4
302. The unit discharge (Qu) is given by the expression
a. ...
Posted by Vishnu on August 8th, 2011 09:49 PM | 17 Comments 291.The speed ratio for Pelton wheel varies from
(a) 0.45 to 0.50
(b) 0.6 to 0.7
(c) 0.3 to 0.4
(d) 0.8 to 0.9.
292. The discharge through Pelton Turbine is given by
(a) Q= πDBVδ
(b) Q=π/4 d2 ×√2gH
(c) Q=π/4
(d) None of the above.
293. The ...
Posted by Vishnu on August 8th, 2011 09:47 PM | 28 Comments 281. The overall efficiency of a turbine is the ratio of
a. Power at the inlet of turbine to the power at the shaft
b. Power at the shaft to the power given to the runner
c. Power at the shaft to ...
