quizz

A strip footing is resting on the surface of a purely clayey soil deposit. If the width of the footing is doubled, the ultimate bearing capacity of the soil

• becomes double

• becomes half

• becomes four -times

• remains the same

Dupuit's assumptions are valid for

• artesian aquifer

• confined aquifer

• leaky aquifer

• unconfined aquifer

The sound pressure (expressed in µ Pa) of the faintest sound that a normal healthy individual can hear is

• 0.2

• 2

• 20

• 55

Some of the nontoxic metals normally found in natural water are

• arsenic, lead and mercury

• calcium, sodium and silver

• cadmium, chromium and copper

• iron, manganese and magnesium

The word similar in meaning to 'dreary' is

• cheerful

• dreamy

• hard

• dismal

For a given discharge in an open channel, there are two depths which have the same specific energy. These two depths are known as

• alternate depths

• critical depths

• normal depths

• sequent depths

Total Kjeldahl Nitrogen (TKN) concentration (mg/L as N) in domestic sewage is the sum of the concentrations of:

• organic and inorganic nitrogen in sewage

• organic nitrogen and nitrate is sewage

• organic nitrogen and ammonia is sewage

• ammonia and nitrate in sewage

A 2m x 4m rectangular footing has to carry a uniformly distributed load of 120kPa, As per the 2:1 dispersion method of stress distribution, the increment in vertical stress (in kPa) at a depth of 2m below the footing is

Answer explanation

σz= Q/(B+Z)(L+Z) for 2V to 1 H load dispersion

= 2 x 4 x 120 ∕ (2+2) (4+2)

= 40 kPa

The clay mineral, whose structural units are held together by potassium bond is

• Halloysite

• Illite

• kaolinite

• smectite

Select the work that fits the analogy

Fuse : Fusion : Use : _

• Usage

• Uses

• Usion

• user