Eom 2 paper 14

66,The maximum permissable speed of the axial flow fan is?,

8000 m/min,

6000 m/min,

5200 m/min,

4200 m/min,

67,The maximum water guage developed in axial flow fan is?,

10 cm,

12.5 cm,

13.5 cm,

15 cm,

68,The water guage developed and quantity circulated with an axial flow fan depend on ?,

Size of the fan,

Shape of the blades,

Design of the evasee,

Speed of the blade tips,

69,with a axial fan direction of travel of air current to the mine is changed by?,

changing direction flow of air into fan by means of doors,

changing the blades on the rotor,

changing the direction of rotation of the motor,

not possible with this type of fan,

70,The pitch of the blades of axial flow fans is?,

1 to 5 deg,

5 to 10 deg,

10 to 15 deg,

15 to 20 deg,

Ans: 4, 2, 4, 3, 3