Specifications
190
HIGHER SECONDARY - VOCATIONAL
THEORY - ELECTRICAL MACHINES AND APPLIANCES
MODEL QUESTION PAPER
Time: 3Hrs Max. Marks: 200
Part – I
Choose the Correct Answer 15x1=15 Marks
1. Insulating materials are used between
A) Conducting materials and Non - conducting materials
B) Two non –conducting materials
C) Two-conducting materials (both not part of current carrying circuit)
D) Two conducting materials (of which only one is part of current carrying circuit)
2. To transfer power without much loss of power<the conductor material should be
A) Very light B) very strong C) have very low resistance D) have very low weight
3. The back pitch for a 4 pole, 12 slot simplex lap connected dc machine is
A) 1.0 B) 3.1 C) 5.3 D) 7.5
4. In single layer winding, the number of coil is equal to ________________ so that
each slot contains only one coil side.
A) The number of slots on the stator B) the number of poles
C) Synchronous speed D) half the number of slots on the stator
5. The value of back pitch of a dc armature winding should be
A) a even integer B) an odd integer C) equal to one D) a prime number
6. In double layer winding to ensure that the coils have the same pitch and turns, there
will be___________coil side(s) in each slot
A) One B) four C) six D) two
7. By performing continuity test, we can determine
i) Existence of any open circuit in the electrical network
ii) Existence of any short circuit in the electrical network
A) i alone is correct B) ii alone is correct C) both are correct D) both are wrong
8. An / A____________ converts
electricity into heat to cook and bake
A) Electric toaster B) electric stove C) fridge D) grinder
9. Pick the odd one out
A) Heating element B) Nichrome C) Sole plate D) Pressure plate
10. The type of heater used to heat the water contained in a plastic buket is
A) Electric kettle B) immersion water heater C) storage water heater D) Any type
11. The drive motor used in electric Mixie is
A) DC series motor B) induction motor C) Universal motor D) synchronous motor
12. T he type of Vacuum cleaner used to clean stairs and under furniture is
A) Cylinder type B) upright type C) Wet and dry type D) Any one