1
GATE EE 2004
+1
-0.3
For harnessing low variable water heads, the suitable hydraulic turbine with high percentage of reaction and runner adjustable vanes is
A
Kaplan
B
Francis
C
Pelton
D
Impeller
2
GATE EE 2004
+2
-0.6
A new generator having $${E_g} = 1.4\,\angle {30^ \circ }\,$$ pu [ equivalent to ($$1.212 +j$$ $$0.70$$)pu ] and synchronous reactance $$'{X_s}'$$ of $$1.0$$ pu on the system base, is to be connected to a bus having voltage $${V_t}$$ in the existing power system. This existing power system can be represented by Thevenin's voltage $${E_{th}} = 0.9\angle {0^ \circ }\,\,$$ pu in series with Tjhevenin's impedance $${Z_{th}} = 0.25\angle {90^ \circ }\,\,$$ pu. The magnitude of the voltage $${V_t},$$ of the system in pu will be
A
$$0.990$$
B
$$0.973$$
C
$$0.963$$
D
$$0.900$$
3
GATE EE 2004
+2
-0.6
The rms value of the resultant current in a wire which carries a dc current of 10 A and a sinusoidal alternating current of peak value 20 A is
A
14.1 A
B
17.3 A
C
22.4 A
D
30.0 A
4
GATE EE 2004
+2
-0.6
In the system shown in Fig. the input $$x\left( t \right) = \sin t.$$ In the steady-state, the response $$y(t)$$ will be
A
$${1 \over {\sqrt 2 }}\,\sin \left( {t - {{45}^ \circ }} \right)$$
B
$${1 \over {\sqrt 2 }}\,\sin \left( {t + {{45}^ \circ }} \right)$$
C
$$\sin \left( {t - {{45}^ \circ }} \right)$$
D
$$\sin \left( {t + {{45}^ \circ }} \right)$$
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