Home/Volume-3/Winding-2 Volume-3 Winding-2 Admin03/08/20240 13 Less than a minute Report a question What's wrong with this question? You cannot submit an empty report. Please add some details. 0% Winding Winding-2 1 / 25 1. Mechanical brakes are applied up to a depth of? 100 m 200 m 300 m 400 m 2 / 25 2. The coefficient of friction between the sheave lining and the rope is minimum of? 0.12 0.2 0.4 0.65 3 / 25 3. The output per month for the Backshunt circuit is? 50000 40000 30000 20000 4 / 25 4. When the material subjected to repeated stresses cause? Fatigue Corrosion fatigue Surface embrittlement Kinking 5 / 25 5. The breaking strength of the locked coil rope is ... if C is rope diameter? 52 C*C 56 C*C 85 C*C 95 C*C 6 / 25 6. The maximum life of the winding rope is? 10 years 7 years 5 years 3.5 years 7 / 25 7. In very deep mining the method of winding best suited is? Drum winding Koepe winding Tower mounted Koepe winding Blair winding 8 / 25 8. The arc of contacting of winding rope in tower mounted friction winding is....deg? 90 to 120 120 to 150 200 to 230 250 to 280 9 / 25 9. The arc of contacting of winding rope in friction winding is....deg? 90 to 120 120 to 150 185 to 230 250 to 280 10 / 25 10. The ultimate strength of the steel rods is about ... kgf/sq.mm? 65 85 100 120 11 / 25 11. The maximum speed of winding drum shaft is? 100 rpm 60 rpm 45 rpm 30 rpm 12 / 25 12. The rope may slip over the wheel when the ratio T1 exceeds a value? 1.2 to 1.3 1.4 to 1.5 1.5 to 1.6 1.8 to 2 13 / 25 13. In the event of power failure the brake automatically applied is? Mechanical brake Thrustor brake Regenarative brake None 14 / 25 14. The output per month for the turn table circuit is? 50000 40000 30000 20000 15 / 25 15. In koepe winding the overwind is prevented by? Detaching hook Automatic contrivances Convergence of the guides None 16 / 25 16. Automatic contrivances should be provided for every shaft exceeding minimum....m depth? 50 80 100 150 17 / 25 17. The portion of the rope suffers from most severe shocks is? Near the capel Near the drum The part of the rope that rests on the drum Part of the rope rests on headgear pulley 18 / 25 18. The torques on the winding drum due to loaded cage and due to empty may be balanced as far as practicable by? Use of balancing rope Use of suitable shape of pulley Changing the load on the two cages Controlling the speed 19 / 25 19. The pit top and pit bottom arrangement which deals with reasonable output per month and occupies less space is? Run round arrangement Back shunt circuit Turn table circuit Traverse circuit 20 / 25 20. When men are being hoisted or lowered as the cage approaches pit top or pit bottom decking level its speed should not exceed 1.5 m/sec such an arrangement is known as? Over speed device Overwind device Ward Leonard control Slow banking device 21 / 25 21. The two factors i.e torque required to raise the load and the winding speed govern? Type of winder Power rating of winding engine Power required for winding engine Size of the motor for winding 22 / 25 22. The method of speed control and electric winder of large capacity i.e above 800kw is? Sheostatic control Liquid control Ward Leonard speed control Electrical breaking 23 / 25 23. Regenarative braking is used when? Hoising loads Lowering loads Inspection of the cage None 24 / 25 24. The method of nearly balancing the torques on the winding engine in deep shaft winding by the use of? Balancing rope Bi cyclo conical drum Conical drum Large cylindrical drum 25 / 25 25. The raising capacity of amine depends on the shaft capacity which in turn depends on? Speed of winding Pit top and pit bottom arrangement Rolling stock Despatch system Your score is The average score is 54% LinkedIn Facebook Twitter 0% Admin03/08/20240 13 Less than a minute
