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A 3 = phage, 400 volts, 50Hz, 100 KW, 4 pole squirrel cage induction motor with a rated slip
of 2% will have a rotor speed വ്‌: .

(ക) 1500 rpm (B) 1470 rpm
(C) 1530 rpm ALY (D) 1570 rpm

A 3 — phase, 400 velts, 50 Hz, 100 KW, 4 pole squirrel cage induction motor with a rated slip
of 2% will have a rotor speed of :

(^) 1500 rpm (B) 1470 rpm
)6 1530 rpm (1) 1570 rpm

The voltage al the two ends of a transmission line are 132 KV and its reactance is 40 ohm,
The Capacity of the line is :

(ಗ) 4356 MW © 77
(८) கமண M) 500 MW

A synchronous mator is operating on no-load at unity power factor. If the field current is
inereased, power factor will become :

(^^) lagging and current will 0८15689
(2) lagging and current will increase
(£) leading and current will decrease
(D) leading and current will increase

A d.c. shunt motor runs at no load speed of 1140 r.p.m. At full load, armature reaction
weakens the main flux by 5% whereas the armature circuit voltage drops by 10%. The motor
full load speed 17 r.p.m. is :

(A) 1200 (ಗ) 1203
(C) 1000 (D) 1080

The most suitable servomotor for low power applications is :
(A) a de series motor (13) a de shunt motor
(8 an ac two-phase induction motor (D)) an ac series motor

A 400 kw, 3-phase, 440 V, 50 Hz induction motor has a speed of 950 r.p.m. on full load. The
machine has 6 poles. The slip of the machine will ‏عط‎

(ಗ) 6 (ए) 0.10
ര 0.04 0) 9.05

In a salient pole synchronous machine (usual symbols are used) :
(3) மரவம்‌ (18) स्वग्यं
€) xg
208/2011 0 து