When is the starting winding cut out of the circuit in the split phase motor?(a) when the motor speed reaches 65 % of the full load speed(b) when the motor speed reaches 75 % of the full load speed(c) when the motor speed reaches 50 % of the full load speed(d) when the motor speed reaches 85 % of the full load speedThe question was asked in semester exam.This intriguing question originated from Types of Motor in section Design of Single Phase Induction Motor of Design of Electrical Machines

When is the starting winding cut out of the circuit in the split phase

1.	When is the starting winding cut out of the circuit in the split phase motor?(a) when the motor speed reaches 65 % of the full load speed(b) when the motor speed reaches 75 % of the full load speed(c) when the motor speed reaches 50 % of the full load speed(d) when the motor speed reaches 85 % of the full load speedThe question was asked in semester exam.This intriguing question originated from Types of Motor in section Design of Single Phase Induction Motor of Design of Electrical Machines
Answer» Right choice is (B) when the motor speed reaches 75 % of the full load speed To explain: The single PHASE induction motor is not a SELF starting machine and hence starting WINDINGS are connected in series with the running winding. The starting windings are CUT out when the motor speed reaches 75 % of the full load speed.

Discussion

No Comment Found

Related InterviewSolutions

The smaller values are applicable for lower rating machines.(a) true(b) falseThis question was addressed to me at a job interview.I need to ask this question from Output Equation topic in chapter Design of Single Phase Induction Motor of Design of Electrical Machines
What is the ratio of power factor of the 75 watt to 750 watt motor?(a) 0.55 : 0.60(b) 0.50 : 0.60(c) 0.55 : 0.65(d) 0.50 : 0.65This question was addressed to me in examination.My question is based upon Output Equation in portion Design of Single Phase Induction Motor of Design of Electrical Machines
What is the formula of the most economical relation between D and L?(a) length = 0.6 * diameter(b) length = 0.5 / diameter(c) length = 0.6 / diameter(d) length = 0.63 * diameterI got this question in an interview for internship.My question is based upon Operating Characteristics topic in portion Design of Single Phase Induction Motor of Design of Electrical Machines
What is the range of the frequency constant?(a) 0.86-1.0(b) 0.82-1.0(c) 0.9-1.0(d) 0.5-1.0This question was posed to me in my homework.I'd like to ask this question from Operating Characteristics topic in division Design of Single Phase Induction Motor of Design of Electrical Machines
What is the range of the motor type constant?(a) 1.1-1.3(b) 1.0-1.4(c) 1.1-1.42(d) 1.1-1.5I have been asked this question in an interview.The above asked question is from Operating Characteristics in division Design of Single Phase Induction Motor of Design of Electrical Machines
The loss for the sleeve bearing having stator outer diameter 150 mm and 1000 rpm is 3.7 W.(a) true(b) falseI have been asked this question during a job interview.Origin of the question is Operating Characteristics in portion Design of Single Phase Induction Motor of Design of Electrical Machines
The high values actually apply for the small motors below 150 W.(a) true(b) falseI have been asked this question in an interview.I need to ask this question from Operating Characteristics topic in division Design of Single Phase Induction Motor of Design of Electrical Machines
What is the range of the multiplying factor when test data is not available?(a) 1.7-2(b) 1.75-2.2(c) 1.6-2.3(d) 1.5-2I had been asked this question in class test.Question is from Operating Characteristics in division Design of Single Phase Induction Motor of Design of Electrical Machines
What is the friction and windage loss for a 1500 rpm machine?(a) 3-7% of watt output(b) 3-9% of watt output(c) 4-8% of watt output(d) 1-5% of watt outputThis question was addressed to me in a national level competition.I need to ask this question from Operating Characteristics topic in portion Design of Single Phase Induction Motor of Design of Electrical Machines
What are the factors which result in the bearing friction and windage loss?(a) ball bearings(b) sleeve bearing(c) ball bearing and sleeve bearing(d) ball bearing or sleeve bearingThis question was addressed to me in class test.I'm obligated to ask this question of Operating Characteristics in section Design of Single Phase Induction Motor of Design of Electrical Machines

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment