D52 MASTER THE DAY

Which part of the turnout is used to allow sliding of tongue rail?

• Slide chair
• Wing rail
• Heel block
• Check rail

Answer explanation

Slide chairs allow the tongue rail to slide during switching operation.

Which is the correct minimum depth of ballast for BG with wooden sleeper?

• 20 cm
• 25 cm
• 30 cm
• 15 cm

Answer explanation

For BG with wooden sleeper, minimum depth of ballast = 25 cm.

Which type of signal is provided at the entrance of a block section?

• Outer signal
• Home signal
• Starter signal
• Advanced starter

Answer explanation

Home signal is placed at the entrance to a block section to authorize train entry.

Which rail component is commonly used in India and provides long service life?

• Cast steel crossing
• Built-up crossing
• CMS crossing
• Spring crossing

Answer explanation

Cast manganese steel (CMS) crossings have long life and high strength and are widely used.

Which bolt is used to fix sleepers directly resting on girders?

• Fang bolt
• Hook bolt
• Fish bolt
• Dog spike

Answer explanation

Hook bolts are used when sleepers rest directly on girders, typically on bridges.

Which type of rail joint is not economical and is rarely used?

• Suspended joint
• Supported joint
• Square joint
• Bridge joint

Answer explanation

Bridge joints involve extra metal parts and are expensive, hence rarely used.

The part which ensures that tongue rails operate together is:

• Heel block
• Stretcher bar
• Slide chair
• Switch rod

Answer explanation

Stretcher bars mechanically link tongue rails and ensure synchronized movement.

The purpose of anti-creepers is to:

• Prevent vertical rail movement
• Resist vibration
• Prevent longitudinal rail movement
• Maintain gauge

Answer explanation

Anti-creepers prevent the longitudinal movement (creep) of rails.

The element used to maintain constant pressure in high-speed rail tracks is:

• Dog spike
• Elastic fastening
• Fang bolt
• Washer

Answer explanation

Elastic fastenings are used to maintain uniform pressure and reduce wear in high-speed tracks.

Which signal is duplicated when visibility is obstructed?

• Outer signal
• Disc signal
• Co-acting signal
• Calling-on signal

Answer explanation

Co-acting signals are duplicate signals placed where the main signal is not clearly visible.