Specifications

191
13. The diameter of the circle traced out by the extreme tips of the fan blades is called as
A) Blade flange B) blade length C) blade sweep D) blade size
14. The part due to wich water gets the centrifugal force is called
A) Casing or volute B) stuffing box C) spindle D) impeller
15. The maintenance work carried out on the machine after it has failed to work is called
A) Breakdown maintenance B) Preventive maintenance
C) Periodic maintenance D) Predictive maintenance
Part – II
Answer all the questions in one or two words 15x1=15 Marks
16. Which classes of insulating material can withstand temp.s of 155
0
C
and
180 C respectively?
17. Which type of copper conductor is called hard copper?
18. Write the formulae for the total number of conductors of a given machine
19. For full pitch winding, what should be the angle between the two sides of the same coil?
20. What rule is used to find the current direction in the armature winding of a dc generator?
21. Which has a tendency to impair the insulation on the wires and cause shorts?
22. While measuring resistance of the coil using multimeter, it reading indicates infinite
resistance. What does it mean?
23. Which part inside a toaster is linked to a toast colour control outside?
24. Which part of electric iron is used to keep the heating element firmly against the sole –
plate?
25. Name the material filled in the space between the tanks in storage water heaters to prevent
heat transfer from inner tank to outer tank.
26. For speed control of mixie motor, tapping is provided in armature coil. Say True or False
27. What is the need of vacuum filters in Vacuum cleaner?
28. What type of capacitor is used in electric ceiling and table fan?
29. What is packing rope made of?
30. What maintenance procedure is based on inspection or diagnosis?