When the two coil sides forming a coil are spaced exactly one pole pitch apart they are said to be of_____________?

Related Mcqs:

1. The distance between the starts of two consecutive coils measured in terms of coil sides is called_____________?

   A. front pitch
   B. winding pitch
   C. commutator pitch
   D. back pitch

2. In D.C. machines the usual limit of slot pitch is________________?

   A. between 5 to 10 mm
   B. between 10 to 15 mm
   C. between 15 to 20 mm
   D. between 25 to 35 mm

3. In D.C. machines the number of slots per pole usually lies___________?

   A. between 2 to 4
   B. between 6 to 8
   C. between 9 to 16
   D. between 20 to 30

4. Dummy coil should not be used in_________________?

   A. small machines
   B. large machines
   C. either A. or B.
   D. none of the above

5. The stator of a D.C. machine comprises of_____________?

   A. main poles
   B. interpoles
   C. frame
   D. all of the above

6. The length cf air gap to be provided in __________ is primarily determined by power factor consideration?

   A. d.c. series motor .
   B. d.c. shunt motor
   C. induction motor
   D. synchronous motor

7. The mcrease in heat dissipation by air blasts is due to increase in______________?

   A. conduction
   B. convection
   E. radiation
   D. any ofthe above

8. On which of the following variables heat convected depends ?

   A. Power density
   B. Temperature difference between heated surface and coolant
   C. Thermal resistivity, density, specific heat
   D. Gravitational constant
   E. All of the above

9. The winding where dummy coils are used is sometimes called______________?

   A. duplex winding
   B. triplex winding
   C. forced winding
   D. none of the above

10. The usual values of maximum flux densities for distribution transformers using hot rolled silicon steel are______________?

    A. 0.5 to 0.8 Wb/m2
    B. 0.8 to 1.0 Wb/m2
    C. 1.1 to 1.35 Wb/m2
    D. 1.4 to 1.8 Wb/m2