[amp_mcq option1=”ST 1-400″ option2=”1-400 or sleeper” option3=”ST 1-260″ option4=”None of these” correct=”option1″]
The correct answer is A. ST 1-400.
A roller bearing vehicle is a type of vehicle that uses roller bearings to reduce friction. This type of vehicle is often used in shunting, which is the process of moving railway cars around a yard or siding.
The steeper the gradient, the more difficult it is for a vehicle to move uphill. A roller bearing vehicle can handle a steeper gradient than a vehicle with traditional bearings. This is because roller bearings have less friction, which allows the vehicle to move more easily uphill.
The ST 1-400 is a type of roller bearing that is designed for use in shunting. It is a high-quality bearing that can handle a steep gradient.
The other options are incorrect. Option B, 1-400 or sleeper, is not a specific type of roller bearing. Option C, ST 1-260, is a type of roller bearing that is not designed for use in shunting. Option D, None of these, is also incorrect.