This set of Railway Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Crossing”.
1. What is done to ensure that at the wheel negotiates the gap of crossing properly?
a) The wheel is widened
b) Speed of train is increased
c) A check rail is provided
d) Material can be filled
Explanation: A gap is provided from the throw to the nose of the crossing and the flanged wheel jumps over it. The other wheel is guided with a check rail to ensure proper negotiation of gap by flanged wheel.
2. Which two rails are machined to form a nose?
a) Point rail and Splice rail
b) Check rail and Splice rail
c) Point rail and Check rail
d) Check rail and Toe rail
Explanation: Check rails do not form the nose. Point and Splice rail are machined to form a nose. Point rail ends at the nose and splice rail joins it a bit behind the nose.
3. What is the thickness of fine end of Point rail?
Explanation: Point rails, theoretically should be as thin as possible. But then they won’t be able to handle the load. Thus its fine end is cut slightly to form a blunt nose with 6mm thickness.
4. Which type of crossing is formed when a right or left rail crosses a similar rail?
a) Acute angle crossing
b) Obtuse angle crossing
c) Square crossing
d) Any random crossing
Explanation: Obtuse angle or diamond crossing is formed when two gauge faces meet at an obtuse angle. An obtuse crossing is formed when a right or left rail crosses a similar rail.
5. Which of the following is not true about Built up crossing?
a) It is assembled with bolts and distance blocks
b) Low initial cost
c) Very Rigid
d) Repairs can be done easily
Explanation: Built up crossing has advantages like low initial cost and easy repairs but they lack rigidity. The bolts require frequent checking and can break because of fast and heavy Traffic.
6. There are no bolts in cast steel crossing.
Explanation: Cast steel crossing is a one piece crossing with no bolts. Because of this it is more rigid and requires very less maintenance. They have high initial cost.
7. Which of the following is not an advantage of CMS crossing?
a) Less wear and tear
b) Longer life
c) Less initial cost
d) Less maintenance cost
Explanation: Nowadays Cast Manganese Steel crossings are being preferred on Indian railways. They have long life, relatively lesser maintenance cost but high initial cost.
8. What type of crossing can be used when there is high speed traffic on main track and low speed on turnout track?
a) Raised check crossing
b) Position crossing
c) CMS crossing
d) Spring crossing
Explanation: A helical spring is used to keep one wing rail movable while the other is kept fixed. This type of crossing can be used when there is high speed traffic on main track and slow speed on turnout track.
9. At a crossing the right hand and left hand wing rail converge to form a throat and then merge into a single rail.
Explanation: Right hand and left hand wing rails converge to form a throat and then diverge on either side of the nose. To facilitate entry and exit of flanged wheel in the gap, wing rails are flared at the ends.
Sanfoundry Global Education & Learning Series – Railway Engineering.
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