Home/Volume-3/Mine Pumps Volume-3 Mine Pumps Admin03/08/20240 15 Less than a minute Report a question What's wrong with this question? You cannot submit an empty report. Please add some details. 0% Mine Pumps Mine Pumps 1 / 35 1. The valve used for priming before start is? Foot valve Retaining valve Bypass valve Sluice valve 2 / 35 2. The maximum number of impellers on the pump shaft normally does not exceed? 4 6 8 10 3 / 35 3. Balancing disc to counteract the end thrust is keyed to? Suction end of the shaft Delivery end of the shaft Middle of the delivery column Middle of the suction column 4 / 35 4. The diameter of the suction pipe is ....of delivery pipe? Equal Twice Thrice Half 5 / 35 5. The valve which is used in the suction pipe to prevent water returning to the pump? Foot valve Retaining valve Bypass valve Sluice valve 6 / 35 6. The self-priming pump is? Centrifugal pump Reciprocating pump Roto pump Both 2 and 3 7 / 35 7. Suction head of Roto/Mono pump is? 4 m 5 m 8 m 10 m 8 / 35 8. The fitting common for all the pumps but not required for submersible pumps is? Suction pipe Delivery pipe Main valve Retaining valve 9 / 35 9. Friction head of a pump varies proportionally with the? Square root of the length of the pipe range Square of the length of the pipe range Length of the pipe range Thrice the pipe range 10 / 35 10. The pitch of the stator is....of the rotor in roto pump? Equal Twice Thrice 2-Jan 11 / 35 11. In reciprocating pump the fitting used to ensure uniform flow of water is called? Foot valve Air vessel Air lock By pass valve 12 / 35 12. Turbine pumps are suitable for water quantities upto? 1 lac lit/min 50000 lit/min 5000 lit/min 500 lit/min 13 / 35 13. Theoretical suction lift of pump at mean sea level is? 5 m 10 m 20 m 30 m 14 / 35 14. In most permanent installations with pneumatic tools and machines the leakage should not exceed ...of the total compressor capacity? 5% 2% 7% 10% 15 / 35 15. Head per stage in roto pump is? 30 m 40 m 50 m 60 m 16 / 35 16. The valve which is used in delivery column to hold the water if pump stops? Foot valve Retaining valve Bypass valve Sluice valve 17 / 35 17. Clifton pulley is used in? Direct rope haulage Endless rope haulage Gravity haulage Main and tail rope haulage 18 / 35 18. End thrust acts? Towards suction end of the pump Towards delivery end of the pipe On the impellers of the pipe None 19 / 35 19. Turbine pumps with multi stages are fitted with and differs with centrifugal pump is? Pressure gauge Balancing disc Retaining valve Foot valve 20 / 35 20. What is the normal operating air pressure for pneumatically operated machines underground is ... psi? 65 25 85 to 100 100 to 120 21 / 35 21. In turbine pump most of the kinetic energy of water is converted into pressure energy is? Diffuser Volute casing In the eye of the pump None 22 / 35 22. The appropriate function of intercooler in large multi-stage compressor is? To cool the LP air To reduce power consumption To drain moisture All the above 23 / 35 23. The pumps most suitable to be used at the working face is? Roto/Mono pumps Centrifugal Drill pumps Reciprocal 24 / 35 24. Maximum head of the roto/mono pump is? 20 m 90 m 120 m 150 m 25 / 35 25. The total suction lift of a turbine pump should not exceed? 2 m 5 m 7 m 9 m 26 / 35 26. The main valve also called as? Foot valve Retaining valve Bypass valve Sluice valve 27 / 35 27. The height of the liquid column in meters produced certain pressure at the bottom of the pipe is known as? Total static head Discharge head Head Friction head 28 / 35 28. In small quarries in the coal washaries and for irrigation purpose the pump used is? Roto/Mono pumps Centrifugal Turbine Reciprocal 29 / 35 29. The device that is used to relieve the operator of the fatigue and keeps drill pressed towards exerting and upward lift and forward pressure feed pressure on the drill is? Drifted Stoped Air leg Rig 30 / 35 30. The velocity of the water in the pipes of the pumps varies? Less than 1 m/s 1 to 2.5 m/sec 2.5 to 4 m/s Above 4 m/s 31 / 35 31. The difference between the pump center line to the free discharge level is called? Head Static discharge head Static suction lift Total static head 32 / 35 32. The example of screw pump is? Centrifugal pump Turbine pump Roto pump Reciprocal pump 33 / 35 33. Turbine pumps are suitable for heads upto? 20 m 100 m 200 m 50 m 34 / 35 34. The mechanical efficiency of the pumps may vary from? 30 to 40 % 40 to 50 % 50 to 60 % 70 to 80 % 35 / 35 35. In balancing disc the loss of energy will be? 1 to 2 % 2 to 4 % 4 to 6 % 6 to 8 % Your score is The average score is 48% LinkedIn Facebook Twitter 0% Admin03/08/20240 15 Less than a minute
