10+ Br.CAT International Interview Questions and Answers

The number of cement bags in one cubic metre depends on the density of the cement.

• The density of cement varies between 1,200 to 1,800 kg/m³

• The weight of one cement bag is usually 50 kg

• Therefore, the number of cement bags in one cubic metre ranges from 55 to 83 bags

The minimum diameter of steel used in a column depends on the load it needs to bear and the height of the column.

• The minimum diameter of steel used in a column is typically 12mm.

• However, it can vary depending on the load it needs to bear and the height of the column.

• For taller columns, larger diameter steel bars may be required to ensure structural stability.

• The diameter of steel used in a column should be specified in the design drawings and approved by a structural engineer...read more

The ratio of M15 is 1:2:4 (cement:sand:aggregate) for concrete mix.

• M15 is a mix of concrete with a compressive strength of 15 N/mm².

• The ratio of M15 is commonly used for residential construction.

• The ratio of M15 can be adjusted based on the specific requirements of the project.

The minimum diameter of steel used in a slab depends on the span, load, and thickness of the slab.

• The minimum diameter of steel bars used in a slab is usually 8mm.

• However, for longer spans and heavier loads, larger diameter bars may be required.

• The thickness of the slab also affects the minimum diameter of steel used.

• For example, a 100mm thick slab may require 10mm diameter bars.

• The minimum diameter of steel used in a slab should be specified in the design drawings.

Development length is the length of reinforcement required to transfer the stress from steel to concrete.

• It is the minimum length of reinforcement bar required to be embedded in concrete to develop its full strength.

• It is influenced by the diameter of the bar, the grade of the steel, and the strength of the concrete.

• It is calculated based on the bond strength between steel and concrete.

• For example, if the development length of a reinforcement bar is 40cm, then the bar must be...read more

Weight of 16 mm dia steel in one metre

• The weight of 16 mm diameter steel rod per metre can be calculated by using the formula D^2/162

• Here, D is the diameter of the steel rod in millimeters

• So, the weight of 16 mm diameter steel rod per metre is (16^2)/162 = 1.580 kg/m

The minimum thickness of an RCC slab depends on various factors such as span, load, and deflection criteria.

• The minimum thickness of an RCC slab is typically determined by structural engineers based on the span of the slab.

• The thickness also depends on the load that the slab needs to support. Heavier loads require thicker slabs.

• Deflection criteria, which refers to the amount of bending or sagging the slab can tolerate, also influences the minimum thickness.

• For residential bui...read more

Density of aggregate is the mass per unit volume of the material.

• Density is an important property of aggregates used in construction.

• It is measured in kg/m³ or lb/ft³.

• The density of different types of aggregates varies depending on their composition.

• For example, the density of granite aggregate is around 2.7 g/cm³.

• The density of lightweight aggregates like expanded clay or shale is around 1.5 g/cm³.

The nominal size of a concrete cube is 150 mm.

• The nominal size of a concrete cube is the length of one side of the cube.

• It is used to test the compressive strength of concrete.

• The standard size of a concrete cube is 150 mm, but other sizes can also be used.

• The cubes are made and cured under controlled conditions before testing.

Total loads in a room can be calculated by adding up the power consumption of all devices.

• Identify all electrical devices in the room

• Determine the power consumption of each device

• Add up the power consumption of all devices to get the total load