GUESSING QUESTION FOR SESSIONAL EXAM EE4G (DCM 17415)

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.