WorksheetsDOCK AND TUNNEL 03/06/2025
Total questions: 12
Worksheet time: 6mins
Name
Class
Date
1.
What is the main purpose of a wet dock?
a)
To repair ships below waterline
b)
To load/unload cargo at varying tidal levels
c)
To maintain constant water level for safe berthing
d)
To allow vessels to enter at high tides only
2.
Which dock type is most affected by high tidal range and results in rubbing of ships against the berth?
a)
Enclosed wet dock
b)
Dry dock
c)
Tidal basin dock
d)
Floating dock
3.
Assertion (A): In enclosed wet docks, water level is maintained constant.
Reason (R): Lock gates help control the water level for easy cargo handling.
a)
Both A and R are true, and R is the correct explanation of A
b)
Both A and R are true, but R is not the correct explanation of A
c)
A is true but R is false
d)
A is false but R is true
4.
Which type of dry dock consists of a hollow structure with two side walls and open ends?
a)
Ship lift
b)
Graving dock
c)
Marine slipway
d)
Floating dock
5.
What is the function of the intermediate pair of gates in a wet dock lock system?
a)
Used for storing fresh water
b)
Reduce water wastage while handling small vessels
c)
Allow large ships only
d)
Balance water pressure on both sides
6.
Which part of the tunnel is responsible for providing flat surface for laying track or roadway?
a)
Arch
b)
Bench
c)
Invert
d)
Key stone
7.
Which method of tunnelling is best suited for soft and unstable soils?
a)
Cut and cover
b)
Heading and bench
c)
Drill and blast
d)
Central drift
8.
In the heading and bench method, what is the primary advantage?
a)
No drilling required
b)
Excavation in full cross section
c)
Simultaneous drilling and mucking possible
d)
No blasting needed
9.
In TBM, what is the function of the shield?
a)
Drilling rock surface
b)
Providing support to excavated tunnel
c)
Placing tunnel linings
d)
Removing muck
10.
Assertion (A): In central drift method, drift is excavated at center.
Reason (R): This provides better ventilation and ease of expansion.
a)
Both A and R are true, and R is the correct explanation of A
b)
Both A and R are true, but R is not the correct explanation of A
c)
A is true but R is false
d)
A is false but R is true
11.
Which is NOT an operation involved in bored tunnelling?
a)
Supporting
b)
Piling
c)
Draining
d)
Grouting
12.
Statement 1: Immersed tunnels are used under water.
Statement 2: They require open excavation from top.
a)
Both statements are true
b)
Only Statement 1 is true
c)
Only Statement 2 is true
d)
Both statements are false
100 %
