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Which among the following are the reasons for extra widening of carriage way on
horizontal circular curves ?

i. To account for off tracking of vehicles at curve.

ii. Psychological reason for driver.

ii. For aesthetic appearance.

iv. For providing overtaking zone in curves.

A) All the above B) i, ii and iii only

C) i, ii and iv only D) i andii only

Low viscosity bitumen applied over a granular base for laying bituminous mix over
it is known as
A) Prime coat B) Tack coat C) Seal coat D) Base coat

Space for servicing, overhauling and repairing of aircraft is called
A) Taxiway B) Apron C) Hangar D) Gate area

Percentage of time during which the use of runway system is not restricted because
of an excessive cross wind component is known as

A) Calm period B) Usability factor

C) Cross wind period D) Usable period

In bridges, component that transfer load from superstructure to substructure is
A) Braces B) Bearing C) Pier D) Deck slab
Application of excess chlorine usually when there is epidemic is known as

A) Double chlorination B) Breakpoint chlorination

C) Super chlorination D) Post chlorination

Hardness due to presence of sulphates, chlorides and nitrates of calcium and
magnesium in water is known as

A) Temporary hardness B) Permanent hardness

C) Carbonate hardness D) Total hardness

Which of the following statement/statements is/are correct about gravity type rapid

sand filters ?

i. Cleaning is by agitation and backwashing.

ii. Period of cleaning is 2 to 3 months.

ii. Less efficient in removal of bacteria compared to slow sand filters.

iv. Schmutzdecke layer formed around the filter media plays crucial role in
filtration.

A) iand ii only 8) i and iii only C) i and iv only D) i only

Chamber constructed in sewer line for maintenance, inspection and cleaning is
known as
A) Manhole B) Cleanouts C) Catch basin D) Flushing tank

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