1
GATE EE 1999
+2
-0.6
A DC shunt motor is running at 1200 rmp, when excited with 220 V DC. Neglecting the losses and saturation, the speed of the motor when connected to a 175 V DC supply is:
A
750 RPM
B
900 RPM
C
1050 RPM
D
1200 RPM
2
GATE EE 1998
+2
-0.6
A 240 V d.c. shunt motor with an armature resistance of 0.5 $$\Omega$$ has a full load current of 40 A. Find the ratio of the stalling torque to the full load torque when a resistance of 1 $$\Omega$$ is connected in series with the armature?
A
4
B
12
C
6
D
None of the above
3
GATE EE 1998
+2
-0.6
Match the following

List-I (Test)
(A) No load and blocked rotor test
(B) Sumpner’s test
(C) Swinburn’s test

List-II (Machine)
(1) Transformer
(2) Induction machine
(3) Synchronous machine
(4) DC machine

A
$$\begin{array}{l}A\;\;\;B\;\;\;C\\2\;\;\;\;1\;\;\;\;4\end{array}$$
B
$$\begin{array}{l}A\;\;\;B\;\;\;C\\1\;\;\;\;2\;\;\;\;4\end{array}$$
C
$$\begin{array}{l}A\;\;\;B\;\;\;C\\4\;\;\;\;3\;\;\;\;1\end{array}$$
D
$$\begin{array}{l}A\;\;\;B\;\;\;C\\4\;\;\;\;1\;\;\;\;3\end{array}$$
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