D.C. Machine

---

---

Q1:- The dummy coil in dc machine is used to

1.       Elimination reactance voltage

2.       Elimination armature reaction

3.       Bring about mechanical balance of armature

4.       Elimination harmonics developed in the machine

ANSWER:-3

---

---

Q2:- The current flowing in the conductors of a dc motor is

1.       Ac

2.       Dc

3.       Ac as well as dc

4.       Transients

ANSWER:-1

---

---

Q3:- As the load is increased the speed of a dc shunt motor will

1.       Remain constant

2.       Increase proportionately

3.       Increase slightly

4.       Reduce slightly

ANSWER:-4

---

---

Q4:- One dc motor drives another dc motor .The second motor when and driven.It 

1. runs
2. does not run as generator
3. runs as a geneator
4. also runs as a motor

ANSWER:-3

---

---

Q5:- In any dc generator the emf generated in the armature is maximum when

1.       Rate of change3 of flux inked is minimum.

2.       Rate of change of flux inked is maximum.

3.       Flux linked with conductor is maximum

4.       Flux linked with conductor is minimum

ANSWER:-2

---

---