1. elliptical
2. bone shaped
3. circular
4. rectangular
bone shaped
1. 2.54 cm
2. 10.16 cm
3. 3.8 cm
4. 5.1 cm
3.8 cm
1. 10 to 15 Km
2. 5 to 6 KM
3. 3 to 5 KM
4. 1 to 2 KM
5 to 6 KM
1. Momentum gradient
2. Pusher gradient
3. Down gradient
4. Ruling gradient
Ruling gradient
1. C.T.C. system
2. pilot guard system
3. section clear system
4. automatic block system
C.T.C. system
1. for noisy engines
2. during foggy and cloudy weather
3. for deaf drivers
4. deot now, were in use in nineteenth century only
during foggy and cloudy weather
1. 4
2. 8
3. 2
4. 6
4
1. Mono railway
2. Underground railway
3. Railway
4. Tube railway
Tube railway
1. 1 in 30
2. 1 in 10
3. 1 in 4
4. 1 in 20
1 in 20
1. cast iron sleepers
2. steel sleepers
3. wooden sleepers
4. all above are suitable
wooden sleepers