1
GATE ME 2010
MCQ (Single Correct Answer)
+1
-0.3
A phenomenon is modeled using $$n$$ dimensional variables with $$k$$ primary dimensions. The number of non-dimensional variables is
A
$$k$$
B
$$n$$
C
$$n-k$$
D
$$n+k$$
2
GATE ME 2007
MCQ (Single Correct Answer)
+1
-0.3
A model of a hydraulic turbine is tested at a head of $$1/{4^{th}}$$ of that under which the full scale turbine works. The diameter of the model is half of that of the full scale turbine. If $$N$$ is the $$RPM$$ of the full scale turbine, then the $$RPM$$ of the model will be
A
$$N/4$$
B
$$N/2$$
C
$$N$$
D
$$2N$$
3
GATE ME 2007
MCQ (Single Correct Answer)
+1
-0.3
The inlet angle of runner blades of a Francis turbine is $${90^0}.$$ The blades are so shaped that the tangential component of velocity at blade outlet is zero. The flow velocity remains constant throughout the blade passage and is equal to half of the blade velocity at runner inlet. The blade efficiency of the runner is
A
$${25^0}.$$
B
$${50^0}.$$
C
$${80^0}.$$
D
$${89^0}.$$
4
GATE ME 2007
MCQ (Single Correct Answer)
+1
-0.3
Match the items in columns $$I$$ and $$II$$.

Column $$I$$
$$P:$$ Centrifugal compressor
$$Q:$$ Centrifugal pump
$$R:$$ Pelton wheel
$$S:$$ Kaplan turbine

Column $$II$$
$$1:$$ Axial flow
$$2:$$ Surging
$$3:$$ Priming
$$4:$$ Pure impulse

A
$$P - 2,\,\,Q - 3,\,\,R - 4,\,\,S - 1$$
B
$$P - 2,\,\,Q - 3,\,\,R - 1,\,\,S - 4$$
C
$$P - 3,\,\,Q - 4,\,\,R - 1,\,\,S - 2$$
D
$$P - 1,\,\,Q - 2,\,\,R - 3,\,\,S - 4$$
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