The underground system cannot be operated above

The world's first underground railway system was built in -

A

Berlin

B

Moscow

C

New York

D

London

In congested areas where excavation is expensive and inconvenient 'draw in system' of laying of underground cables is often adopted.

A

Yes

B

No

The tunnels, the artificial underground passages are constructed for:

A

Highways

B

Railways

C

Sewerage

D

All the above

Underground cables are laid at sufficient depth

A

To minimize temperature stresses

B

To avoid being unearthed easily due to removal of soil

C

To minimize the effect of shocks and vibrations due to gassing vehicles, etc.

D

For all of the above reasons

When was the first underground railway (Metro Railway) started?

A

1982

B

1989

C

1984

D

1992

They are present in the underground parts of the plants and stored food.

A

Leucoplasts

B

Chromoplasts

C

Chloroplasts

D

Lysosomes

For determining the velocity of flow of underground water, the most commonly used non-empirical formula is

A

Darcy’s formula

B

Slichter’s formula

C

Hazen’s formula

D

Lacy’s formula

Which one of the following tunneling methods is used for laying underground sewers?

A

Needle beam method

B

Army method

C

German method

D

Italian method

Which of the following methods is used for laying of underground cables?

A

Direct laying

B

Draw-in-system

C

Solid system

D

All of the above

The material commonly used for sheaths of underground cables is

A

Lead

B

Rubber

C

Copper

D

Iron

The underground system cannot be operated above

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