Vehicles carrying inflammable materials usually have metallic ropes touching the ground during motion in order to

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Q: 73 (CAPF/2011)
Vehicles carrying inflammable materials usually have metallic ropes touching the ground during motion in order to

question_subject: 

Science

question_exam: 

CAPF

stats: 

0,34,34,7,34,13,14

keywords: 

{'inflammable material': [0, 0, 0, 1], 'inflammable materials': [0, 0, 0, 1], 'metallic ropes': [0, 0, 0, 2], 'lightning': [1, 0, 3, 6], 'vehicles': [0, 0, 1, 8], 'vehicle': [0, 0, 0, 5], 'ground': [2, 1, 4, 17], 'friction': [0, 0, 1, 1], 'motion': [0, 0, 0, 3], 'charge': [1, 0, 4, 12], 'speed': [0, 1, 2, 0]}

Option 1: Control the speed of the vehicle. This option is incorrect. Metallic ropes touching the ground during motion do not control the speed of the vehicle.

Option 2: Conduct the charge produced by friction. This is the correct answer. When vehicles carrying inflammable materials move, friction between the vehicle and the ground can generate static electricity. This static electricity can potentially ignite the inflammable materials, leading to a fire or explosion. By having metallic ropes touching the ground, the charge produced by friction is conducted away, preventing a buildup of static electricity and reducing the risk of ignition.

Option 3: Conduct the current produced by inflammable material. This option is incorrect. Inflammable materials do not typically produce current. The main concern is the generation of static electricity.

Option 4: Provide earthing for lightning. This option is incorrect. Metallic ropes touching the ground during motion do not provide earthing for lightning. Lightning protection systems use different mechanisms to safely direct lightning strikes to the ground.

In conclusion, option 2 is the correct answer as metallic ropes touching the ground during motion help conduct the charge produced by friction, reducing the risk of ignition for vehicles carrying inflammable materials.