10+ Phera Interview Questions and Answers

The permetric weight of 25mm reinforcement can be found using the formula: weight = (d^2/162) * L, where d is the diameter and L is the length.

• Calculate the square of the diameter of the reinforcement (25mm * 25mm = 625mm^2)

• Divide the square by 162 (625mm^2 / 162 = 3.858mm)

• Multiply the result by the length of the reinforcement to get the permetric weight

For M20 grade, approximately 320 kg of cement is used in 1m³.

• M20 grade concrete has a mix proportion of 1:1.5:3 (cement:sand:aggregate).

• The total volume of the mix is 1+1.5+3 = 5.5

• Therefore, the cement quantity required for 1m³ = (1/5.5) x 1m³ = 0.182m³

• The density of cement = 1440 kg/m³ (approx.)

• Hence, the cement required for 1m³ = 0.182 x 1440 kg/m³ = 262.08 kg/m³ (approx.)

• However, it is recommended to use 320 kg/m³ to account for wastage and other factors.

The number of bricks used in 1 m³ varies depending on the size of the bricks.

• The size of the bricks affects the number of bricks used in 1 m³.

• Different countries may have different standard brick sizes.

• To calculate the number of bricks, divide the volume of 1 m³ by the volume of a single brick.

• For example, if the size of a brick is 0.2 m x 0.1 m x 0.06 m, the volume of a single brick is 0.0012 m³.

• In this case, the number of bricks used in 1 m³ would be 1 / 0.0012 = 833.33 (ro...read more

There is no direct conversion between square feet and cubic meters as they measure different dimensions.

• Square feet (ft²) is a unit of area, while cubic meters (m³) is a unit of volume.

• To convert between the two, you would need to know the height or depth of the space in question.

• For example, if you have a room that is 10 feet wide, 10 feet long, and 10 feet high, the volume would be 1,000 cubic feet (10 ft × 10 ft × 10 ft).

• To convert this volume to cubic meters, you would di...read more

BBD stands for Babu Banarasi Das, a renowned politician and former Chief Minister of Uttar Pradesh, India.

• BBD is the acronym for Babu Banarasi Das, a prominent political figure in Uttar Pradesh.

• Babu Banarasi Das was the Chief Minister of Uttar Pradesh from 1995 to 1996.

• BBD is also the name of a university in Lucknow, Uttar Pradesh, established in 2010.

The number 20 in M20 refers to the compressive strength of concrete in megapascals after 28 days of curing.

• M20 is a mix of concrete with a compressive strength of 20 megapascals (MPa) after 28 days of curing.

• The compressive strength of concrete is the maximum amount of compressive stress that the concrete can withstand before failing.

• The strength of concrete is determined by the ratio of cement, sand, and aggregate used in the mix.

• Higher strength concrete mixes like M30, M40,...read more

The answer is 0.1818

• The formula is a division operation

• The result is a decimal number

• The answer is recurring

Strength of 28 days refers to the compressive strength of concrete after 28 days of curing.

• It is a measure of the concrete's ability to resist compression.

• It is an important factor in determining the quality of the concrete.

• The strength of concrete can vary depending on the mix design, curing conditions, and other factors.

• The standard for minimum compressive strength of concrete after 28 days is 20 MPa.

• Testing is done by crushing a cylindrical sample of the concrete in a comp...read more

The height of a column in residential buildings depends on various factors such as load-bearing capacity, structural design, and architectural preferences.

• The height of a column in residential buildings is determined by the load it needs to support. Heavier loads may require taller columns.

• The structural design of the building also plays a role in determining the height of the columns. Engineers consider factors like the type of construction, materials used, and the overall s...read more