Most Asked 92 Civil Engineering Interview Questions With Answers PDF

we are providing most Asked 92 Civil Engineering Interview Questions With
Answers PDF,lt is very helpful for upcoming interview of CIL

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What are the causes of building collapse?
Passage of time is one reason. Buildings also collapse due to weak foundations.
Earthquakes, hurricanes and other natural disasters can also damage the
structure of the buildings and cause it to collapse. Bombings or demolition of
buildings is also other reasons.
What are the applications of modulus of elasticity?
the term implies, “Modulus of Elasticity relates to the elasticity or
“flexibility” of a material. The value of modulus of elasticity is very much
significant relating to deflection of certain materials used in the
construction industry. Take for example the general E value of mild carbon
steel is about 200 GPA compared to about 70 GPA for aluminum. This simply
translate that aluminum is 3 times flexible than steel.
What is the difference between routing maintenance and major maintenance in
school facilities?
routine maintenance is the minor and consistent repairs that are engaged in the
school premises.  Examples could include Painting, replacement of
fixtures, louver blades, furniture repairs, and Patching cracks in the school buildings.
major maintenance could also be a total rehabilitation of the school, either
school buildings or any other project within the school community. It could be
total restructuring of the lighting system in the school or sanitary system.
How are freeway bridges built?
calculating the anticipated traffic for the bridge, cement/reinforced- with-
rebar stanchions are spaced over the freeway
to accommodate the bridge. An ‘off-ramp’ from the freeway
to the bridge is constructed, as is an ‘on-ramp’ to
the subsequent road. Cement/rebar slabs are built and lifted with cranes to
form the
and voila! Drive carefully.
the bridge deck/roadway is almost always a concrete slab, the structure that
holds up the bridge deck can be reinforced concrete, structural steel, or a
combination of steel and concrete.
What is the difference between absorption & adsorption and sorption?
generally refers to two phenomena, which are largely unrelated. In one case, it
refers to when atoms, molecules, or ions enter some bulk phase – gas, liquid or
solid material. For instance, a sponge absorbs water when it is dry.
also refers to the process by which the energy of a photon is taken up by
another entity, for example, by an atom whose valence electrons make transition
between two electronic energy levels. The photon is destroyed in the process.
The absorbed energy may be re-emitted as radiant energy or transformed into
heat energy.
absorption of light during wave proPAgation is often called attenuation. The
tools of spectroscopy in chemistry are based on the absorption of photons by
atoms and molecules.
is similar, but refers to a surface rather than a volume: adsorption is a
process that occurs when a gas or liquid solute accumulates on the surface of a
solid or, more rarely, a liquid (adsorbent), forming a molecular or atomic film
(the adsorb-ate). It is different from absorption, in which a substance
diffuses into a liquid or solid to form a solution.
How do you measure concrete?
feet, Cubic yards, Cubic Meter

Which is stronger solid steel rod or hollow steel pipe?
a per pound basis, steel pipe is stronger in bending and is less likely to
buckle in axial compression.
What is the tallest man
made structure in the world?
The tallest
man made structure
is the KVLY-TV mast which is 2063 feet tall. The worlds tallest man made structure is Burj Dubai which is
800 meter tall.
What are the uses of alloys in daily life and how are alloys made?
is not always done to produce a ‘superior’ material, but to produce materials
having a desired requirement in the industry or elsewhere. A classic case is of
lead solder (containing lead & tin), in which the melting point of the
constituent elements are lowered, not necessarily a desirable property.
Alloying can be carried out using hot press method (a sheet of material is
sandwiched with alloying material), rolling the heated base metal in a drum
full of alloying metal powder, using hot spraying, galvanizing (dipping the
base in a molten solution of alloying material) etc. Sometimes the alloying
material is added in small proportions to the molten base metal (e.g., in
production of different types of steel).
What is the worlds largest concrete dam?
Grand Coulee Dam is said to be the largest concrete dam. Currently the world’s largest
concrete dam is the Itaipu Dam, an accomplishment of two neighboring countries,
Brazil and PAraguay in South America.
it is not finished yet, the Three Gorges (or Sandapong) Dam on the Yangtze
River in China will take over as the largest upon its completion, which is
slated for 2009.
What is braced excavation all about?
are braced to prevent the cave-in of surrounding unstable soil.
What is aggregate?
is the component of a composite material used to resist compressive stress.
What is the meaning of soil reinforcement?
reinforcement is the act of improving soil strength to enable it support or
carry more load. Two common examples are:
Mixing a soil amendment such as lime into weak clayey soil and re-compacting to improve soil- bearing capacity (often done under
the road base in highway construction)
Installing plastic or composite webbing layers (called geogrid material)
alternating with compacted soil to produce a stronger sloped soil structure
(often done on steep roadway embankments to improve strength and stability).
What year was the keystone power plant in Indiana County constructed?
began commercial operation on unit 1.
What is the force exerted by the Tacoma narrows bridge?
force exerted to the Tacoma narrows bridge was initially the wind resistance.
The wind resistance caused the whole bridge to act as a system with forced
vibration with damping.

How do you calculate the power of a centrifugal pump?
input power, that is, the power required to operate the pump should be stated
in Hp (horsepower) on the pump’s nameplate. It can also be calculated by the
3-phase power equation:
Hp) = VI(1.7c) = Rated Voltage x Rated Current x 1.73/ %Efficiency
this is a consumer grade pump that operates on 120Vac, then the equation
becomes P = VI, simply multiply the operating voltage, 120 x current (which is
the number followed by the letter “A”.
output power, which really is not technically power, but rated in Gpm (gallons
per minute), or capacity should also be on the nameplate. If you have the make,
model, and (not necessarily needed) the serial number (also on the nameplate)
you could call the manufacturer’s customer service dept. As an application
engineer, I have contacted countless manufacturers, and service dept’s for
assistance. It is now big deal to them, they will be happy to answer your
Why nautical mile is different from statute
nautical mile is defined by one latitude minute of arc (there are 60 such
minutes to a degree). This equals 1852 meters, and roughly (but coincidentally)
2000 yards or 6000 feet. (Edit: actually, a standard nautical mile is 6076
feet, 6000 feet and 2000 yards are commonly used approximations, but produce an
error of about 1%).
statute mile had a little fuzzier definition to start with, as one mile was the
same as 1000 roman PAces/steps. The definition has since changed, but one
statute mile equals about 1609 meters.
What is rigging?
sailing, the ropes used to move the sails around so the boat will move in the
right direction when the wind blows.
What is absolute pressure?
pressure is simply the addition of the observed gage pressure plus the value of
the local atmospheric pressure.
What is Gravity flow?
flow is fluid flowing due to the forces of gravity alone and not to an applied
pressure head. In the Bernoulli equation, the pressure term is omitted, and the
height and velocity terms are the only ones included.

Most Important 200 Mechanical Engineering Interview Questions and Answers PDF

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