NEW
Font size
WorksheetsSIM- Module 1
Total questions: 10
Worksheet time: 5mins
Majority of alternators in use have ..............................................................................................
revolving ac armature winding
stationary field type construction
revolving field type construction
none of the above
The field winding of alternator is ..................................................... excited.
d.c or a.c
a.c
d.c
none of these
The ac armature winding of alternator operates at .................................................the field winding.
the same voltage as
much lesser voltage than
much higher voltage than
none of these
An alternator is also called as ............................................... generator.
induction
synchronous
asynchronous
semi-synchronous
The nonsalient pole field construction is used for .......................................................alternator.
low speed
medium speed
high speed
very slow speed
The low speed alternators are generally driven by ..................................................................... .
hydraulic turbines
steam turbine
steam engine
gas turbine
Alternator operates on the principle of ......................................................
self induction
mutual induction
self or mutual induction
electromagnetic induction
Which type of alternators are used in hydro electric power station ?
Steam turbine alternator
Turbo alternator
Salient pole alternator
Cylindrical pole alternator
Alternators are usually designated to generate which type of AC voltage?
with fixed frequency
with variable frequency
fixed current
fixed power factor
State whether the following statements are true or FALSE.
1. Salient pole rotor alternators have non-uniform airgap.
2. Salient pole rotor alternators are mechanically robust.
1 is true but 2 is false.
1 is false but 2 is true
Both 1 and 2 are false
Both 1 and 2 are true
