D51 MASTER THE DAY

Which component is used to fix double-headed or bull-headed rails to the sleeper?

• Rail-chair
• Fish plate
• Bearing plate
• Spike

Answer explanation

Rail-chair is used to fix double-headed or bull-headed rails.

What is the material commonly used to make rail-chairs?

• Mild Steel
• Cast Iron
• Stainless Steel
• Steel

Answer explanation

Cast iron is commonly used to manufacture rail-chairs.

What is placed between the outer jaw and web of rail in a rail-chair?

• Air gap
• Steel plate
• Wooden key
• Fish key

Answer explanation

A slightly tapered steel or wooden key is placed between outer jaw and web.

What is the function of a bearing plate on a wooden sleeper?

• To prevent rail movement
• To support ballast
• To transfer load
• To fix fish bolts

Answer explanation

Bearing plates distribute rail pressure over wider area.

What does a bearing plate prevent in softwood sleepers?

• Crushing of metal
• Crushing of timber fibres
• Rail shifting
• Bolt failure

Answer explanation

Softwood sleeper fibres are crushed; bearing plates prevent this.

Which component is used to distribute pressure and avoid sleeper crushing?

• Fish plate
• Bearing plate
• Spike
• Sleeper

Answer explanation

Bearing plate helps avoid direct pressure on sleeper and prevents crushing.

Which type of spike is commonly used in railway construction?

• Dog spike
• Round spike
• Screw spike
• Clip spike

Answer explanation

Dog spikes are standard spikes used in railway construction.

Spikes are used to fix rails to which of the following?

• Wooden sleepers
• Metallic rails
• Timber planks
• Fish plate

Answer explanation

Spikes fix rails to wooden sleepers.

Which key is used between jaws of rail chairs and web of rail?

• Cotter key
• Wooden or steel tapered key
• Split key
• Fish bolt

Answer explanation

Wooden or steel tapered key is used between jaws and web of rail.

What is the use of fish plates in railways?

• To join fish bolts
• To fix gauge
• To anchor sleepers
• To measure rail depth

Answer explanation

Fish plates are used to join rails at joints.