Civil Engineering Interview Questions and Answers 2017

Civil engineering is one of the oldest branches of engineering that deals with the design, construction and maintenance of buildings, roads, bridges, artificial waterways, dams etc. Civil engineers have shown their expertise from time immemorial. From the Roman Pantheon to Hong Kong international airport, civil engineers have excelled in every step. Interview questions for civil engineers include strength of materials, material science, energy engineering, environmental engineering and earthquake engineering.
  • Define Modulus of Elasticity? 
    Modulus of Elasticity, also know as elastic modulus is the elastic deformation tendency of a material. In the stress strain curve the slope is the elastic modulus.
  • What is the chemical composition of cement? 
    Cement primarily consists of CaO. The chemical composition of Portland cement is tricalcium silicate, dicalcium silicate, tricalcium aluminate and tetracalcium aluminoferrite.
  • What is tensile strength? 
    It is the maximum longitudinal stress that an object can withstand without necking. It denotes the maximum point in a stress strain curve.
  • Which is the world’s largest hydroelectric project? 
    The Three Gorges dam on Yangtze River in China is the world’s largest hydroelectric project in terms of total capacity. The total capacity of the Three Gorges dam upon full completion would be 22500 MW with 32 turbines. Its length is 2335m and height is 101m. The second largest is the Itaipu dam on the Parana River in the border of Brazil and Paraguay. Its length is 7700m and height is 196m with a capacity of 14GW in 20 turbines.
  • Explain soil analysis. 
    Soil testing is a qualitative analysis to determine the nutritional and elemental composition of soil. Soil is mostly tested for elements such as nitrogen, phosphorus and potassium. It is also tested for acidity, moisture, organic contents and contaminants.
  • What are the points in the stress strain curve for mild steel? 
    The points in the stress strain curve for mild steel are Proportional limit, elastic limit or yield point, ultimate stress and stress at failure.
  • What are building codes? 
    Building codes are a set of specifications regarding minimum safety conditions that any building should take in account during construction. Building codes deal with the height, spacing, installations of a building. These codes lay huge emphasis on safety and ease to evacuate the building in case of an emergency.
  • What is fire resistance rating
    It is a measure of time up to which a system could resist the fire resistance test. It is generally depicted by a time-temperature graph.
  • What are tectonic plates? 
    Tectonic plates are the pieces of the Earth’s lithosphere. The lithosphere lies over the asthenophere, which has a higher density and makes the tectonic plates on the lithosphere to move. The movement of the tectonic plates is said to be the cause of earthquakes. Ocean trenches, volcanoes and mountains exist at the meeting points of two tectonic plates.
  • What is the Richter scale? 
    The Richter scale, a base 10 logarithmic scale, is a measure to quantify the seismic energy from an earthquake.