Related Questions

The speed control of universal motor used for sewing machines is by
A friction
B varying the resistance
C tapping the field
D centrifugal mechanism
a motor -cycle covers 40 Km with a speed of 20 km /hr. Find the speed of the motor -cycle for the next 40 km journey so that the average speed of the whole journey will be 30 km / hr.
A 70.0km /hr
B 52.5km /hr
C 60.0km/hr
D 60. 5 km / hr
A motor cycle covers 40 km with a speed of 20 km/hr. Find the speed of the motor cycle for the next 40 km journy so that the average speed of the whole journey will be 30 km/hr?
A 70
B 52.5
C 60
D 60.5
The drive-shafts are connected to the differential and wheel hubs through universal joints because the universal joints
A Absorb the vibrations transferred from the surface of the road
B Compensate for variations in the relative positions of the differential and the wheels which result from bumpy road surfaces or other similar driving conditions.
C Absorb any difference in speed between the left and right wheels when the vehicle is turning
D None of the above
In case of high speed universal motor which of the following needs more attention ?
A End play
B Air gap
C Insulation in rotor
D Balancing of rotor
The speed of a universal motor is generally reduced by using
A gear trains
B V-belts
C brakes
D chains
The speed of a universal motor is usually reduced by using
A gearing
B belts
C brakes
D chains
The speed/load characteristics of a universal motor is same as that of
A D.C. motor
B D.C. shunt motor
C D.series motor
D none of the above
Size of a high speed motor as compared to low speed motor for the same H.P. will be
A Bigger
B Smaller
C Same
D Any of the above
Of the 120 households in an area, 55 have cars, 35 have motor bikes, and 20 have both cars and motor bikes. How many of the households in the area have neither cares nor motor bikes?
A 110
B 90
C 50
D 30

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