Hello,
Would you like some atpl AC electrics questions? Here they are...
1- The rotating part of a generator is :
a) the field coil
b) the rotor
c) the stator
d) the impeller
I'd have initially said "the armature" but unfortunetely this is not among the given answers
.
2- A reduction in supply frequency will cause :
a) an AC motor to overspeed
b) an AC motor to stop immediately
c) capacitive equipement to overheat
d) inductive equipement to overheat
3- The output voltage of an alternator driven by a CSDU depends upon :
a) its line current
b) the engine rpm
c) the continuous adjustment of the field current by the voltage regulator
d) the generator shaft speed
4- To increase the output frequency of of an alternator driven by a CSDU :
a) the load should be reduced
b) the rotor speed should be reduced
c) the engine speed should be increased
d) the rotor speed should be increased
5- The output of a typical AC generator is taken direct from :
a) the commutator
b) the exciter windings
c) the stator windings
d) the rotor via slip rings
6- An alternator with its AC output taken from its stationary armature has :
a) a stationary field
b) its field excitation fed directly to the armature
c) a static inverter
d) a rotating field
7- In a split bus distribution system having three phase AC generators the phase relationship between generators is :
a) 120°
b) anti-phase
c) 60°
d) unimportant
8- To ensure correct load sharing between AC generators :
a) the reactive loads should be the same
b) actual loads should be the same
c) both reactive loads and real loads should be the same
d) the impedance should be constant
9- Generators operating in parallel must have their frequencies maintained at a constant level and their phase synchronised to :
a) control their output voltage
b) reduce their magnetic field
c) make it possible to control the inductance of the field
d) ensure that they each take their share of the total load
Thank you.