@⇒ D.C. Motors ⇒ Electrical Engineering Multiple Choice Questions / Objective type questions, MCQ's, with question and answers, download free PDF, short cut notes, rapid fire notes, best theory

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Q1.	Which D.C. motor has got maximum self loading property?
A.	Series motor [Wrong Answer]
B.	Shunt motor [Wrong Answer]
C.	Cumulatively compounded motor [Wrong Answer]
D.	Differentially compotinded motor [Correct Answer]
View Answer 55 -48 Explanation:- Answer : D Discuss it below : Click here for more comments


Q2.	When the speed of a D.C. motor increases
A.	back e.m.f. increases and current drawn decreases [Correct Answer]
B.	back e.m.f. as well as current drawn both increase [Wrong Answer]
C.	back e.m.f. as well as current drawn both decrease [Wrong Answer]
D.	back e.m.f. decreases and current drawn increases [Wrong Answer]
View Answer 32 -16 Explanation:- Answer : A Discuss it below : Click here for more comments


Q3.	Which D.C. motor is generally preferred for cranes and hoists ?
A.	Series motor [Correct Answer]
B.	Shunt motor [Wrong Answer]
C.	Cumulatively compounded motor [Wrong Answer]
D.	Differentially compounded motor [Wrong Answer]
View Answer 24 -10 Explanation:- Answer : A Discuss it below : Click here for more comments


Q4.	As the load is increased the speed of D.C. shunt motor will
A.	reduce slightly [Correct Answer]
B.	increase slightly [Wrong Answer]
C.	increase proportionately - [Wrong Answer]
D.	remains unchanged [Wrong Answer]
View Answer 17 -7 Explanation:- Answer : A Discuss it below : Click here for more comments


Q5.	If Ia be the armature current, then speed of a D.C. shunt motor is
A.	independent of la [Correct Answer]
B.	proportional to Ia [Wrong Answer]
C.	varies as (la)² [Wrong Answer]
D.	varies as¹/_{I_a} [Wrong Answer]
View Answer 15 -10 Explanation:- Answer : A Discuss it below : Click here for more comments

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