Direction of rotation of a split phase motor can be reversed by reversing the connection of

When two computers communicate with each other, they send information back and forth. If they are separated by a reasonable distance, they can send and receive the information through a direct cable connection which is called a null-modem connection. Presently what is the maximum distance in metres permitted in this null-modem connection?

A

80

B

100

C

30

D

150

E

None of the above

If the earth's direction of rotation is reversed, what would be the IST when it is noon at the International Date Line?

A

06.30 hrs

B

05.30 hrs

C

18.30 hrs

D

17.30 hrs

In repulsion motor direction of rotation of motor

A

Is opposite to that of brush shift

B

Is the same as that of brush shift

C

Is independent of brush shift

D

None

In case of a shaded pole motor the direction of rotation of the motor is

A

from main pole to shaded pole

B

from shaded pole to main pole

C

either of the above depending on voltage

D

either of the above depending on power factor

In case one phase of a three-phase synchronous motor is short-circuited the motor will

A

Not start

B

Run at $$\frac{2}{3}$$ of synchronous speed

C

Run with excessive vibrations

D

Take less than the rated load

Which of the following law/rule can he used to determine the direction of rotation of D.C. motor?

A

Lenz

B

Faraday

C

Coulomb’s law

D

Fleming

The direction of rotation of a D.C. series motor can be changed by

A

Interchanging supply terminals

B

Interchanging field terminals

C

Either of (A) and (B) above

D

None of the above

In a split phase motor

A

the starting winding is connected through a centrifugal switch

B

the running winding is connected through a centrifugal switch

C

both starting and running windings are connected through a centrifugal switch

D

centrifugal switch is used to control supply voltage

In a split phase motor, the running winding should have

A

high resistance and low inductance

B

low resistance and high inductance

C

high resistance as well as high inductance

D

low resistance as well as low inductiance

In split-phase motor auxiliary winding is of

A

thick wire placed at the bottom of the slots

B

thick wire placed at the top of the slots

C

thin wire placed at the top of the slots

D

thin wire placed at the bottom of the slots

Direction of rotation of a split phase motor can be reversed by reversing the connection of

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