McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .
| 51. |
Highest density material is |
| A. | Damp sand |
| C. | Cement |
| D. | Coarse salt |
| E. | Lead salt |
| Answer» E. Lead salt | |
| 52. |
Which of the following material has the lowest weight/volume ratio? |
| A. | Charcoal |
| B. | Wheat |
| C. | Lignite |
| D. | Oats |
| Answer» A. Charcoal | |
| 53. |
Which hoist is often used in erection work? |
| A. | Magnetic lifting hoist |
| B. | Electric hoist |
| C. | Hand chain hoist |
| D. | all of the above |
| Answer» C. Hand chain hoist | |
| 54. |
Belt life is reduced by |
| A. | impact of loading |
| B. | conveying horizontally as compared to incline |
| C. | using pulverized materials |
| D. | all of the above |
| Answer» A. impact of loading | |
| 55. |
In case ac motors are used on E.O.T. the type of motor used is |
| A. | synchronous motor |
| B. | wound roto-induction motor |
| C. | squirrel case induction motor |
| D. | Any of the above |
| Answer» B. wound roto-induction motor | |
| 56. |
The number of sleepers per rail (n = length of rail in metres) |
| A. | is n + 1 |
| C. | varies from n + 9 to n + 12 |
| D. | varies from n + 3 to n + 6 |
| E. | varies from n + 1 to n + 3 |
| Answer» D. varies from n + 3 to n + 6 | |
| 57. |
Skip hoists used on blast furnaces are generally |
| A. | manually driven |
| C. | electric motor driven |
| D. | air motor driven |
| E. | steam engine driven |
| Answer» C. electric motor driven | |
| 58. |
The normal capacity of a one metre escalator is around |
| B. | 1000 passengers per hour |
| C. | 2000 to 3000 passengers per hour |
| D. | 5000 to 6000 passengers per hour |
| E. | 8000 to 10000 passengers per hour |
| Answer» D. 5000 to 6000 passengers per hour | |
| 59. |
The angle of repose for anthracite coal is around |
| A. | 37? |
| C. | 27? |
| D. | 17? |
| E. | 11? |
| Answer» C. 27? | |
| 60. |
Air hoists provide |
| A. | slow speeds only |
| B. | infinitely variable speeds |
| C. | stepped movement |
| D. | fast speeds only |
| Answer» B. infinitely variable speeds | |
| 61. |
Tanker type wagons are used on railways for the transportation of |
| A. | oils |
| C. | powders |
| D. | fertilizers |
| E. | grains |
| Answer» A. oils | |
| 62. |
Lifting magnets cannot be used for |
| B. | handling materials above dull-red heat |
| C. | under water handling |
| D. | handling dust of magnetic materials |
| E. | handling ferrous castings |
| Answer» B. handling materials above dull-red heat | |
| 63. |
Lift trucks are used in industries generally for the transportation of |
| A. | batches of material |
| B. | castings only |
| C. | non-ferrous materials |
| D. | heavy equipment |
| Answer» A. batches of material | |
| 64. |
Which of the following device is used for dragging the material? |
| A. | Skip hoists |
| B. | Escalators |
| C. | Winches |
| D. | Bucket elevators |
| Answer» C. Winches | |
| 65. |
Practically all power shovels can be converted for operation as |
| A. | dragline excavators |
| B. | cranes |
| C. | both (A) and (B) above |
| D. | None of the above |
| Answer» C. both (A) and (B) above | |
| 66. |
Which of the following shovel excavator has got the shortest cycle time? |
| A. | Backhoe |
| B. | Dipper shovel |
| C. | Drag line |
| D. | Clam shell |
| Answer» B. Dipper shovel | |
| 67. |
Which one of the following shovel excavator is not suitable for operation in hard soil or rock? |
| A. | Drag line |
| B. | Back hoe |
| D. | Dipper shovel |
| E. | Clam shell |
| Answer» E. Clam shell | |
| 68. |
In case of belt conveyors, a tripper is used to |
| A. | facilitate loading |
| B. | facilitate unloading |
| C. | prevent shock loading |
| D. | prevent damage to belt |
| Answer» B. facilitate unloading | |
| 69. |
In case of skip hoists, complete control of speed from standstill to maximum for all values of load from maximum positive to maximum negative is obtainable while using |
| A. | Slip ring induction motor |
| B. | dc series motor |
| C. | dc compound motor |
| E. | Ward Leonard system of control |
| Answer» E. Ward Leonard system of control | |
| 70. |
Bull headed rails are generally provided at |
| A. | points and crossings |
| C. | curved tracks |
| D. | bridges |
| E. | bifurcation of tracks |
| Answer» A. points and crossings | |
| 71. |
The steam engine used on steam locomotive is |
| A. | condensing, variable speed type |
| B. | non-condensing, constant speed type |
| C. | condensing, constant speed type |
| E. | non-condensing, variable speed type |
| Answer» E. non-condensing, variable speed type | |
| 72. |
Identify the incorrect statement, if any |
| A. | Crawler tractors are more compact and powerful |
| B. | Crawler tractors can travel faster than wheel tractors |
| C. | Crawler tractors are generally more costly than the wheeled tractors |
| E. | Wheeled tractors are liable to slip over very smooth or loose fittings when increased power is applied to the wheels. |
| Answer» B. Crawler tractors can travel faster than wheel tractors | |
| 73. |
Which of the following has the lowest weight/volume ratio? |
| A. | Chalk |
| B. | Talc |
| D. | Silica flour |
| E. | Saw dust |
| Answer» E. Saw dust | |
| 74. |
The method of speed control used on 25 kV, 50 Hz single phase traction is |
| A. | tap changing control of transformer |
| B. | reduced current method |
| C. | series parallel operation of motors |
| D. | Any of the above |
| Answer» A. tap changing control of transformer | |
| 75. |
Which of the following is a hygroscopic material? |
| A. | Purnice |
| B. | Carbon black |
| D. | Ammonium nitrate |
| E. | Bone meal |
| Answer» D. Ammonium nitrate | |
| 76. |
A shovel having dipper capacity of one cubic metre working on good common earth will handle approximately |
| A. | 100 cubic metres/hour |
| B. | 175 cubic metres/hour |
| C. | 15 cubic metes/hour |
| E. | 45 cubic metres/hour |
| Answer» B. 175 cubic metres/hour | |
| 77. |
Which of the following material is corrosive? |
| A. | Sulphur |
| C. | Starch |
| D. | Soap flakes |
| E. | Zinc oxide |
| Answer» A. Sulphur | |
| 78. |
Which one of the following is not a excavating and moving type machine? |
| A. | Clam shell |
| B. | Drag line |
| C. | Scraper |
| E. | Dump truck |
| Answer» E. Dump truck | |
| 79. |
Boiler plant ash is generally handled using |
| A. | hydraulic conveyors |
| B. | belt conveyors |
| C. | screw conveyors |
| D. | any of the above |
| Answer» A. hydraulic conveyors | |
| 80. |
The overall efficiency of steam locomotive system is |
| A. | 5 to 10 percent |
| C. | 35 to 45 percent |
| D. | 15 to 25 percent |
| E. | 25 to 35 percent |
| Answer» A. 5 to 10 percent | |
| 81. |
The phenomenon of misalignment of rails due to temperature changes is known as |
| A. | Buckling |
| C. | Cropping |
| D. | Hogging |
| E. | Creeping |
| Answer» A. Buckling | |
| 82. |
Derricks are generally used |
| A. | in quarries |
| B. | for construction work |
| C. | for outdoor works |
| D. | Any of the above |
| Answer» D. Any of the above | |
| 83. |
Wood preferred for sleepers is |
| A. | Chir |
| B. | Shesham |
| C. | Deodar |
| E. | Sal |
| Answer» A. Chir | |
| 84. |
The overload capacity of a diesel engine is around |
| A. | 10 percent |
| B. | 50 percent |
| C. | 1 percent |
| D. | 25 percent |
| Answer» A. 10 percent | |
| 85. |
Which of the following key is not used in railway tracks? |
| A. | Stuart key |
| B. | Woodruff key |
| D. | Cotter key |
| E. | Morgan key |
| Answer» B. Woodruff key | |
| 86. |
In case of excalators, the angle of incline from horizontal is |
| B. | 10? |
| C. | 15? |
| D. | 30? |
| E. | 45? |
| Answer» D. 30? | |
| 87. |
Which of the following item can be conveyed using pneumatic conveyors? |
| A. | soda ash |
| B. | salt cake |
| C. | carbon black |
| D. | all of the above |
| Answer» D. all of the above | |
| 88. |
Which of the following has lubricating action? |
| B. | Graphite |
| C. | Saw dust |
| D. | Cottonseed |
| E. | Rubber scrap |
| Answer» B. Graphite | |
| 89. |
A 25 mm wire rope sling can safely take a load of |
| A. | 40 to 50 tonnes |
| C. | 4 to 5 tonnes |
| D. | 25 to 30 tonnes |
| E. | 90 to 100 tonnes |
| Answer» C. 4 to 5 tonnes | |
| 90. |
While dragging, the coefficient of friction (using steel plate) will be maximum in case of |
| B. | coke |
| C. | bituminous coal |
| D. | anthracite |
| E. | hog fuel, dry |
| Answer» C. bituminous coal | |
| 91. |
Welded link wheel chains are surface hardened to |
| A. | increase shock absorption capacity |
| B. | increase load carrying capacity |
| C. | provide adequate wear life |
| D. | all of the above |
| Answer» C. provide adequate wear life | |
| 92. |
In case of skip hoists, the hoisting speed generally ranges from |
| A. | 20 to 30 m/s |
| B. | 6 to 15 m/s |
| C. | 1 to 5 m/s |
| E. | 30 to 50 m/s |
| Answer» B. 6 to 15 m/s | |
| 93. |
In case of hand powered cranes, the capacity is generally restricted to |
| A. | 250 tonnes |
| B. | 150 tonnes |
| C. | 1 tonne |
| D. | 50 tonnes |
| Answer» D. 50 tonnes | |
| 94. |
Skip hoists are generally used where |
| A. | the lift is too high |
| B. | the lumps to be lifted are large |
| C. | the material is pulverized |
| D. | all of the above |
| Answer» D. all of the above | |
| 95. |
Arsenic salts are heavy as well as poisonous. Which of the following conveyor is preferred for its handling? |
| A. | Belt conveyor |
| B. | Screw conveyor |
| C. | Flight conveyor |
| D. | Any of the above |
| Answer» B. Screw conveyor | |
| 96. |
Which braking system is not used in case of earth moving machinery? |
| A. | Hydraulic braking system |
| B. | Vacuum braking system |
| C. | Pneumatic braking system |
| D. | Mechanical braking system |
| Answer» B. Vacuum braking system | |
| 97. |
As compared to anthracite coal, the angle of repose for coke will be |
| B. | more |
| C. | less |
| E. | same |
| Answer» B. more | |
| 98. |
In case of broad gauge track the distance between the rails is |
| A. | 1.562 metre |
| B. | 1.0 metre |
| C. | 0.762 metre |
| E. | 1.676 metre |
| Answer» E. 1.676 metre | |
| 99. |
Braking system is invariably incorporated in case of |
| A. | Electric hoists |
| B. | Magnetic hoists |
| C. | Hand chain hoists |
| D. | all of the above |
| Answer» A. Electric hoists | |
| 100. |
Jacks are portable, hand-operated devices for moving |
| B. | heavy |
| C. | heavy |
| D. | light |
| E. | light |
| Answer» C. heavy | |
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