Site Engineer/Site Supervisor Interview Questions and Answers

Frequency and wavelength are inversely proportional to each other.

• Frequency is the number of waves that pass a point in a given time period.

• Wavelength is the distance between two consecutive points on a wave that are in phase.

• The higher the frequency, the shorter the wavelength.

• The lower the frequency, the longer the wavelength.

• The formula to calculate the speed of a wave is wavelength x frequency.

• Examples: Radio waves have a low frequency and long wavelength, while X-rays ha...read more

The depth of foundation from gl can be determined by referencing the provided drawing.

• Refer to the drawing provided to locate the ground level (gl)

• Measure the distance from the ground level to the bottom of the foundation to determine the depth

• Ensure that the foundation depth meets the required specifications for the construction project

Clear cover for foundation is the minimum distance between the outer surface of the reinforcement and the outer surface of the concrete.

• Clear cover is important to protect the reinforcement from corrosion and ensure durability of the structure.

• The clear cover for foundation is typically specified in the structural drawings or codes.

• The clear cover requirements may vary based on the type of foundation and the environmental conditions.

• For example, the clear cover for a foundati...read more

Class A chopper is a type of electronic switch used in power electronics.

• Class A chopper is a type of DC-DC converter.

• It is used to regulate the voltage or current in a circuit.

• It operates in the linear region of the transistor.

• It has high efficiency and low ripple.

• Examples include buck-boost chopper, forward chopper, and flyback chopper.

Quantity calculation for footing involves determining the volume of concrete required for the foundation.

• Calculate the volume of the footing by multiplying the length, width, and depth of the footing.

• Convert the volume to cubic meters by dividing by 27 (for cubic feet to cubic yards conversion).

• Multiply the volume by the density of concrete (typically around 2400 kg/m^3) to get the total weight of concrete needed.

• Consider adding extra concrete for wastage and ensure proper re...read more

A Variable Frequency Drive (VFD) is an electronic device used to control the speed and torque of an electric motor.

• VFD converts the fixed frequency and voltage of the power supply to a variable frequency and voltage.

• It adjusts the motor speed by varying the frequency of the electrical input.

• VFDs use pulse width modulation (PWM) to control the output voltage and frequency.

• They provide smooth acceleration and deceleration of the motor, reducing mechanical stress.

• VFDs can save e...read more

Standard deviation is a measure of the amount of variation or dispersion of a set of values from its mean.

• Standard deviation of M25 concrete is a measure of the variation of compressive strength values of M25 grade concrete.

• It is calculated using the formula: σ = √(Σ(xi - x̄)² / n), where σ is the standard deviation, xi is the individual value, x̄ is the mean value, and n is the number of values.

• The standard deviation of M25 concrete is typically around 4-5 N/mm².

• It is importan...read more

The size of a brick can vary depending on the type and country of origin.

• The standard size of a brick in the UK is 215mm x 102.5mm x 65mm.

• In the US, the standard size is 203mm x 92mm x 57mm.

• Bricks can also come in different shapes and sizes for specific purposes.

• The size of a brick can affect the amount of mortar needed for construction.