#### Hydrographic survey deal with the mapping of

Hydro mean water, So Hydrographic survey deal with the mapping of large water bodies.

#### If the smallest division of a Vernier is longer than the smallest division of its primary scale, Vernier is known as

Retrograde Vernier

#### A well conditioned triangle has angles not less than ____ and not more than ____ respectively.

A well conditioned triangle has angles not less than 90 degree and not more than 120 degree respectively.

#### Compensating error in chaining are ___

Error in computation or in recording of accounting data, that is neutralized (counter balanced) by an equal and opposite error. Since compensating errors do not show up in the total, they are difficult to locate through statistical methods.

#### If a chain is found too short in testing, it can be adjusted by ___

If a chain is found too short in testing, it can be adjusted by any method which is suitable.

#### Permissible limit of error in chaining for measurement on rough or hilly ground is ___

Permissible limit of error in chaining for measurement on rough or hilly ground is 1 in 250. You should choose 1 in 100 if option given.

#### During chaining along a straight line, the leader of a survey party has 3 arrows and follower has 5 arrows, the distance of the follower from the starting point will be ___

#### Invar tapes are made of an alloy of ___

FeNi36 The name Invar comes from the word invariable, referring to its relative lack of expansion or contraction with temperature changes (230 degree). It is ductile and similar to stainless steel.

#### Chaining is the distance measured ___

#### In chain survey execution, the first step taken is ___

Steps 1. Reconnaissance - The preliminary inspection of the area to be surveyed is called reconnaissance. 2. Marking stations 3. Reference sketches 4. Running survey line

#### A soil has liquid limit of 60%, plastic limit of 35%, shrinkage limit of 20% and it has a natural moisture content of 50%. What is the liquidity index of the soil ?

The liquidity index (LI) is used for scaling the natural water content of a soil sample to the limits. It can be calculated as a ratio of difference between natural water content, plastic limit, and liquid limit: LI=(W-PL)/(LL-PL) where W is the natural water content.

#### The effective stress strength parameters of a soil are c = 10 kPa and φ = 300, then shear strength on a plane within the saturated soil mass at a point where total normal stress is 300 kPa and pore water pressure is 150 kPa, will be ______.

#### If the pore of soil is completely full of air only, the soil is said to be

#### A soil sample has void ratio of 0.5 and its porosity will be close to ___

Porosity = void ratio/(1+void ratio) Porosity =0.5/(1+0.5) = 0.33

#### Gradually Varied flow is ____

#### Bluff body surface ___

#### Centre of pressure on an inclined plane is ___

Centre of pressure on an inclined plane is Below the centroid

#### Separation of flow occur when pressure gradient ___

Separation of flow occur when pressure gradient changes abruptly

#### A one dimension flow is one which ___

A one dimension flow is one which Involves zero transverse components of flow