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Dc generators
| 1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
| 2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
| Q1 ⇒ Equilizer rings are required in case
armature is lap wound [other wrong options] [Discuss in forum] |
| Q2 ⇒ Magnetic field in a D.C. generator is
produced by electromagnets [other wrong options] [Discuss in forum] |
| Q3 ⇒ In a D.C. generator the actual flux distribution
depends upon all of the above [other wrong options] [Discuss in forum] |
| Q4 ⇒ Interpole flux should be sufficient to neutralise both the armature reaction flux as well as commutating e.m.f. induced in the coil [other wrong options] [Discuss in forum] |
| Q5 ⇒ A shunt generator running at 1000
r.p.m. has generated e.m.f. as 200 V. If
the speed increases to 1200 r.p.m., the
generated e.m.f, will be nearly 240 V [other wrong options] [Discuss in forum] |
| Q6 ⇒ A cumulatively compounded long
shunt generator when operating as a
motor would be differentially compounded long shunt [other wrong options] [Discuss in forum] |
| Q7 ⇒ In a D.C. generator in case the resistance
of the field winding is increased,
then output voltage will decrease [other wrong options] [Discuss in forum] |
| Q8 ⇒ In a level compounded D.C. generator,
full load terminal voltag-e is equal to no-load terminal voltage [other wrong options] [Discuss in forum] |
| Q9 ⇒ Wave winding is composed of that even number which is exact multiple of poles + 2 [other wrong options] [Discuss in forum] |
| Q10 ⇒ The terminal voltage of a series generator
is 150 V when the load current is
5 A. If the load current is increased to
10 A, the terminal voltage will be greater than 150 V [other wrong options] [Discuss in forum] |
| Q11 ⇒ In a D.C. generator the critical resistance
can be increased by increasing its speed [other wrong options] [Discuss in forum] |
| Q12 ⇒ The slight curvature at the lower emf
of the O.C.C. of a self-excited D.C. generator
is due to magnetic inertia [other wrong options] [Discuss in forum] |
| Q13 ⇒ In D.C. generator the change in voltage
when the load is reduced from rated value to zero, expressed as a percentage
of rated load voltage, is known as regulation [other wrong options] [Discuss in forum] |
| Q14 ⇒ Drop in speed of a D.C. generator due
to increase in load can be compensated
by increasing the input to the prime mover [other wrong options] [Discuss in forum] |
| Q15 ⇒ In a commutator mica is harder than copper [other wrong options] [Discuss in forum] |
| Q16 ⇒ In a four-pole D.C. machine alternate poles are north and south [other wrong options] [Discuss in forum] |
| Q17 ⇒ If B is the flux density, i the length of
conductor and v the velocity of conductor,
then induced e.m.f. is given by Blv [other wrong options] [Discuss in forum] |
| Q18 ⇒ The polarity of a D.C. gernerator can be
reversed by reversing the field current [other wrong options] [Discuss in forum] |
| Q19 ⇒ Welding generator will have lap winding [other wrong options] [Discuss in forum] |
| Q20 ⇒ The number of brushes in a commutator
depends on amount of current to be collected [other wrong options] [Discuss in forum] |
| Or |