17.
18.
19.

20.

The utilization factor of a power station is ————————— than one.
The condition for series resonance is

A source having internal impedance of (3+ 141) 0 is to deliver maximum power to a
resistive load. The load resistance should be ———————— (२.

Autotransformer is used (൦൦൦൦൦൦ 8101 ആ ൦-൦ voltage.

Choose the correct answer

21,

22

23,

25.

26,

27.

The aren of the hysteresis loop represents
(व) magnetic flux (0) permeance

(८) energy lose/cycle (d) mmffeycle

The highest value of thermal conduetivity is for
(श) Aluminium (0) थ

(¢) Copper (१) [ष्णा

Feeder is designed mainly from the point of view of
(೩) its current carrying capacity (b) voltage drop in it

(८) operating voltage (व) operating frequency

Bulk power transmission over long HVDC lines are preferred an account of
{8} low cost of HVDC terminals (b) no harmonic preblems

(ट) minimum line power losses (ध) simple protection

The critical clearing time of a fault in power system is related to
(व) reaclive power limit 8) circuit limit

(5 steady state stability imit (ध) transient stability limit

The excessive motor vibration is caused by

(೩) worn bearings (10) o©pen armature coil

(c) bentshaft {d) excessive brush tension

The power rating of an electric drive is measured by considering ട്ട losses proportional
to

(a) மள (0) நண

(9 power® (4) torque

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