GUESSING QUESTION FOR SESSIONAL EXAM (DCM 17415)
Q1) attempt any three (3X3)
a) List out any four parts of DC Machines.
b) State the types of DC motor
and explain any of them.
c) State fleming’s left hand
rule.
d) What are the different types
of starter used to start DC motor.
Q2) attempt any Two (4X2)
a) Why Starter is needed to start
DC motor.
b) Draw and explain all
characteristics of DC series motor and state its applications.
c) A 250V,lap wound DC machine
has full load armature current of 100A, armature resistance of 0.25ohm and 272 armature conductors. The
contact drop on each brush is 1 V. Determine the speed if the machine is i) a
generator ii) a motor
Q3) attempt any Two (4X2)
a) Distinguished between Core type and Shell Type
Transformer.
b) Derive Emf Equation of Transformer.
c) A 4 pole dc generator having wave wound armature winding
has total 1020 conductors. Determine the emf generated when driven at 1500 RPM
assuming flux per pole to be 7.0 mWb.