McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .
| 1. |
Which of the following resistance depends on the train speed? |
| A. | Journal friction |
| B. | Track resistance |
| C. | Frictional resistance |
| D. | all of the above |
| Answer» D. all of the above | |
| 2. |
In case of electric traction, power supply frequency for 25 kV single phase system is |
| A. | 60 Hz |
| B. | 16? Hz |
| C. | 25 Hz |
| E. | 50 Hz |
| Answer» E. 50 Hz | |
| 3. |
The number of cylinders in case of steam locomotives is |
| A. | Eight |
| B. | Four |
| D. | Two |
| E. | One |
| Answer» D. Two | |
| 4. |
In case of screw conveyors, cut flights are used for |
| A. | grains |
| B. | cereals |
| C. | light materials |
| D. | all of the above |
| Answer» D. all of the above | |
| 5. |
Which one of the following shovel excavators is considered most efficient in loading carriers? |
| A. | Dipper shovel |
| C. | Clam shell |
| D. | Back hoe |
| E. | Drag line |
| Answer» A. Dipper shovel | |
| 6. |
In screw conveyors, ribbon screws are used for |
| A. | wet and sticky materials |
| B. | granular materials |
| C. | none of the above |
| Answer» A. wet and sticky materials | |
| 7. |
A jack having 2 cm as the diameter of the screw at the root of the thread, may be expected to safely lift a load of about |
| A. | 25 to 30 tonnes |
| C. | 5 to 7 tonnes |
| D. | 35 to 40 tonnes |
| E. | 40 to 50 tonnes |
| Answer» C. 5 to 7 tonnes | |
| 8. |
Automatic scales can be used with |
| A. | belt conveyors |
| B. | apron conveyors |
| C. | pivoted bucked carriers |
| D. | Any of the above |
| Answer» D. Any of the above | |
| 9. |
The angle of repose depends on |
| A. | shape of the material |
| B. | smoothness of the material |
| C. | degree of fineness of the material |
| D. | all of the above |
| Answer» D. all of the above | |
| 10. |
Car shakers are often used for |
| A. | unloading of coal |
| B. | loading of granular materials |
| C. | both (A) and (B) above |
| D. | None of the above |
| Answer» A. unloading of coal | |
| 11. |
A four wheel drive has |
| A. | differential on rear side only |
| B. | differential on front side only |
| C. | both front as well as rer differentials |
| D. | no differential |
| Answer» C. both front as well as rer differentials | |
| 12. |
The maximum degree of broad gauge line is |
| B. | 10? |
| C. | 12? |
| D. | 14? |
| E. | 8? |
| Answer» B. 10? | |
| 13. |
In case of flight conveyors the angle of flight is seldom allowed to exceed |
| B. | 75? |
| C. | 70? |
| D. | 60? |
| E. | 40? |
| Answer» E. 40? | |
| 14. |
In case of pneumatic system, a receiver is |
| A. | a device for storing compressed air |
| B. | a divice for storing atmospheric air |
| C. | a device for cleaning air |
| D. | a device for cooling air |
| Answer» A. a device for storing compressed air | |
| 15. |
Flight conveyors are mainly used for conveying |
| B. | iron ore |
| C. | bauxite |
| D. | coal |
| E. | grains |
| Answer» D. coal | |
| 16. |
A chain link while in use may be subjected to |
| A. | bending |
| B. | shear |
| C. | tension |
| D. | Any of the above |
| Answer» D. Any of the above | |
| 17. |
In case of a single girder overhead travelling crane, the section used is |
| A. | I-beam |
| B. | Z-section |
| D. | angle iron |
| E. | a channel |
| Answer» A. I-beam | |
| 18. |
The distance between the rails of a metre gauge railway line is |
| A. | One metre |
| C. | 4 ft, 6 |
| D. | 3 ft, 9 |
| E. | 0.692 metre |
| Answer» A. One metre | |
| 19. |
Pneumatic conveyors are generally used for conveying |
| A. | package goods |
| B. | granular material |
| C. | mineral ores |
| E. | heavy goods |
| Answer» B. granular material | |
| 20. |
Electric motor used for skip hoists may be |
| A. | dc motor |
| B. | Slip ring type induction motor |
| C. | Ward Leonard system |
| D. | Any of the above |
| Answer» D. Any of the above | |
| 21. |
We know that acid phosphate (damp) adheres to the belt of belt conveyor. Which of the following conveyor will be preferred for conveying this material? |
| A. | Screw conveyor |
| B. | Flight conveyor |
| C. | pneumatic conveyor |
| D. | Any of the above |
| Answer» A. Screw conveyor | |
| 22. |
In case of an overhead travelling crane, the hoisting unit is supported on |
| A. | a pillar |
| B. | a bridge |
| C. | a tower |
| D. | Any of the above |
| Answer» B. a bridge | |
| 23. |
Which of the following material has the highest weight/volume ratio? |
| A. | Barley |
| B. | Coke |
| C. | Limestone |
| D. | Charcoal |
| Answer» C. Limestone | |
| 24. |
The expected life of a light commercial vehicle is nearly |
| B. | 250,000 km |
| C. | 150,000 km |
| D. | 50,000 km |
| E. | 350,000 km |
| Answer» C. 150,000 km | |
| 25. |
In electric traction, the torque exerted is |
| A. | continuous, pulsating |
| B. | pulsating, continuous |
| D. | pulsating, pulsating |
| E. | continuous, continuous |
| Answer» A. continuous, pulsating | |
| 26. |
A 90 HP tractor dozer working on a dozing distance of about 60 m will give an output of about |
| A. | 4000 cu-m/hr |
| B. | 4 cu-m/hr |
| D. | 40 cu-m/hr |
| E. | 400 cu-m/hr |
| Answer» D. 40 cu-m/hr | |
| 27. |
A 7.5 cu.m scraper working on a 150 m haul is expected to give an output of approximately |
| A. | 1 cu-m/hr |
| C. | 5 cu-m/hr |
| D. | 100 cu-m/hr |
| E. | 10 cu-m/hr |
| Answer» D. 100 cu-m/hr | |
| 28. |
The fuel consumption of a diesel engine per BHP per hour is nearly |
| A. | 300 cc |
| B. | 100 cc |
| C. | 400 cc |
| E. | 200 cc |
| Answer» E. 200 cc | |
| 29. |
Jacks may be |
| A. | screw type |
| B. | rack-and-lever type |
| C. | hydraulic type |
| D. | Any of the above |
| Answer» D. Any of the above | |
| 30. |
Pneumatic cranes are used where |
| A. | electricity could be hazardous |
| B. | advantage could be taken of existing air supply |
| C. | either of (A) or (B) above |
| Answer» C. either of (A) or (B) above | |
| 31. |
The horse power of electric motor for a 50 tonne locomotive should be around |
| A. | 5 HP |
| B. | 750 HP |
| C. | 7.5 HP |
| D. | 75 HP |
| Answer» B. 750 HP | |
| 32. |
Which of the following condition of rail surface will offer the least resistance? |
| A. | Greasy |
| B. | Very dry |
| D. | Average dampness |
| E. | Very wet |
| Answer» A. Greasy | |
| 33. |
Which conveyor can be used for handling wood chips? |
| A. | Belt conveyor |
| B. | Pneumatic conveyor |
| C. | Screw conveyor |
| D. | Any of the above |
| Answer» D. Any of the above | |
| 34. |
The permissible belt slope while transporting wood chips will be |
| B. | 27? |
| C. | 12? |
| D. | 20? |
| E. | 15? |
| Answer» B. 27? | |
| 35. |
Alum is |
| A. | hygroscopic |
| B. | abrasive |
| C. | none of the above |
| Answer» B. abrasive | |
| 36. |
Hoisting and haulage ropes are frequently greased to |
| A. | minimize wear |
| B. | prevent corrosion |
| C. | both (A) and (B) above |
| Answer» C. both (A) and (B) above | |
| 37. |
All of these form explosive dust except |
| A. | Starch |
| C. | Pulverized Mica |
| D. | Sulphur |
| E. | Soyabean flour |
| Answer» C. Pulverized Mica | |
| 38. |
All of the following could be the reasons for the formation of kinks in a rail EXCEPT |
| B. | Defect in gauge alignment |
| C. | Temperature variation |
| D. | Loose packing at joint |
| E. | Uneven wear of the rail head |
| Answer» C. Temperature variation | |
| 39. |
The pressure of air in case of pneumatic tools is generally in the range |
| B. | 4 to 6 kg/cm2 |
| C. | 34 to 36 kg/cm2 |
| D. | 24 to 26 kg/cm2 |
| E. | 14 to 16 kg/cm2 |
| Answer» B. 4 to 6 kg/cm2 | |
| 40. |
Most of the lifting magnets are |
| A. | not designed for continuous duty |
| B. | designed for continuous duty |
| Answer» A. not designed for continuous duty | |
| 41. |
The maximum degree of curvature on metre gauge is |
| B. | 12? |
| C. | 16? |
| D. | 10? |
| E. | 8? |
| Answer» C. 16? | |
| 42. |
Which of the following locomotive has the highest operational availability? |
| A. | Steam |
| B. | Diesel |
| C. | Electric |
| Answer» C. Electric | |
| 43. |
Average weight/volume ration for ash is around |
| A. | 300 kg/m3 |
| C. | 900 kg/m3 |
| D. | 600 kg/m3 |
| E. | 1200 kg/m3 |
| Answer» D. 600 kg/m3 | |
| 44. |
While dragging, the coefficient of friction (using steel plate) will be least in case of |
| A. | anthracite coal |
| B. | coke |
| C. | bituminous coal |
| D. | hog fuel |
| Answer» A. anthracite coal | |
| 45. |
The efficiency of diesel locomotive is in the range |
| B. | 40 to 50 percent |
| C. | 10 to 15 percent |
| D. | 60 to 70 percent |
| E. | 20 to 30 percent |
| Answer» E. 20 to 30 percent | |
| 46. |
A 6 x 7 steel wire rope indicates |
| A. | The core wire has 6 mm diameter and it is covered by seven strands |
| C. | The rope has six strands and each strand is composed of seven wires |
| D. | The rope has 6 mm mean diameter and 7 mm outer diameter |
| E. | the rope has six wires and each wire has seven strands |
| Answer» C. The rope has six strands and each strand is composed of seven wires | |
| 47. |
Kink' in a steel wire rope is produced |
| A. | when the rope is permanently elongated due to overloading |
| B. | when some strands are broken |
| D. | when a rope with a loop or twist in its length is pulled tight |
| E. | when the rope looses its springing action |
| Answer» D. when a rope with a loop or twist in its length is pulled tight | |
| 48. |
Cable ways are generally used in |
| A. | mining areas for transportation of minerals |
| B. | sleepers, pipes etc |
| C. | heavy machinery |
| D. | None of the above |
| Answer» A. mining areas for transportation of minerals | |
| 49. |
Which hoist is generally preferred for repetitive or high speed lifting? |
| A. | Magnetic lifting hoist |
| B. | Electric hoist |
| C. | Hand chain hoist |
| D. | None of the above |
| Answer» B. Electric hoist | |
| 50. |
Coarse salt is hygroscopic and corrosive in weight. It can be transported using |
| A. | belt conveyors |
| B. | flight conveyors |
| C. | pneumatic conveyors |
| D. | Any of the above |
| Answer» D. Any of the above | |
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