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The speed of a motor falls from 1100 r.p.m. at no-load to 1050 r.p.m. at rated load. The speed regulation of the motor is______________?
Related MCQs
Usually wide and sensitive speed control is desired in case of__________?
Which of the following method of speed control of D.C. machine will offer minimum efficiency ?
The armature torque of the D.C. shunt motor is proportional to__________?
As -the load is increased the speed of D.C. shunt motor will__________?
Which of the following motor has the poorest speed regulation ?
Buses, trains, trolleys, hoists, cranes require high starting torque and therefore make use of__________?
In a differentially compounded D.C. motor, if shunt field suddenly opens__________?
Following motor is used where high starting torque and wide speed range control is required?
Flywheel is used with D.C. compound motor to reduce the peak demand by the motor, compound motor will have to be__________?
Speed control by Ward Leonard method gives uniform speed variation__________?
Sparking, is discouraged in a D.C. motor because__________?
Three point starter can be used for__________?
Which D.C. motor is generally preferred for cranes and hoists ?
In D.C. machines the residual magnetism is of the order of__________?
For which of the following applications a D.C. motor is preferred over an A.C. motor ?
The condition for maximum power in case of D.C. motor is__________?
The mechanical power developed by a shunt motor will be maximum when the ratio of back e.m.f. to applied voltage is__________?
Which one of the following is not the function of pole shoes in a D.C. machine ?
If the supply voltage for a D.C. motor is increased, which of the following will decrease ?
Which of the following motor is preferred for operation in highly explosive atmosphere ?
Sparking at the commutator of a D.C. motor may result in__________?
In case of conductively compensated D.C. series motors, the compensating winding is provided__________?
For the same H.P. rating and full load speed, following motor has poor starting torque__________?
D.C. series motors are used__________?
If a D.C. shunt motor is working at no load and if shunt field circuit suddenly opens__________?
Which D.C. motor will be suitable along with flywheel for intermittent light and heavy loads?
Which D.C. motor has got maximum self loading property?
The power mentioned on the name plate of an electric motor indicates__________?
The current drawn by the armature of D.C. motor is directly proportional to__________?
In a D.C. series motor, if the armature current is reduced by 50%, the torque of the motor will be equal to
The speed of a D.C. series motor is__________?
The starting resistance of a D.C. motor is generally__________?
Which of the following load normally needs starting torque more than the rated torque?
Which of the following law/rule can he used to determine the direction of rotation of D.C. motor ?
In D.C. motor which of the following can sustain the maximum temperature rise?
The ratio of starting torque to full-load torque is least in case of__________?
In case-the conditions for maximum power for a D.C. motor are established, the efficiency of the motor will be__________?
A three point starter is considered suitable for__________?
In D.C. machines fractional pitch winding is used__________?
In which of the following applications D.C. series motor is invariably tried?
By looking at which part of the motor, it can be easily confirmed that a particular motor is D.C. motor?
These days D.C. motors are widely used in__________?
In a D.C. shunt motor, under the conditions of maximum power, the current in the armature will be__________?
In case of D.C. shunt motors the speed is dependent on back e.m.f. only because__________?
What will happen if the back e.m.f. of a D.C. motor vanishes suddenly?
A direct on line starter is used: for starting motors__________?
In a D.C. shunt motor, speed is__________?
The speed of a D.C. shunt motor more than its full-load speed can be obtained by__________?
When two D.C. series motors are connected in parallel, the resultant speed is__________?
To get the speed of D.C, motor below the normal without wastage of electrical energy is used?
If a D.C. motor is connected across the A.C. supply it will__________?
The speed of a motor falls from 1100 r.p.m. at no-load to 1050 r.p.m. at rated load. The speed regulation of the motor is______________?
A. 2.36%
B. 4.76%
C. 6.77%
D. 8.84%
Correct Answer:
4.76%
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Last Updated:
July 02, 2018