Aerial Telecom Solutions Project Engineer Interview Questions and Answers

M20 grade is a type of concrete mix used in construction, with a compressive strength of 20 megapascals (MPa).

• M20 grade refers to the mix ratio of cement, sand, and aggregate used in concrete.

• It is commonly used for general construction purposes.

• The compressive strength of M20 grade concrete is 20 MPa after 28 days of curing.

• The mix ratio for M20 grade is 1:1.5:3, which means 1 part cement, 1.5 parts sand, and 3 parts

The torque value of an M30 bolt depends on various factors such as material, lubrication, and application.

• The torque value can range from 1500 Nm to 4000 Nm depending on the factors mentioned above.

• It is important to consult the manufacturer's specifications or a torque chart for the specific bolt and application.

• Using the correct torque value is crucial for ensuring the safety and integrity of the bolted joint.

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Admixture is a material added to concrete to modify its properties.

• Admixtures can improve workability, strength, durability, and reduce water content.

• Examples of admixtures include water reducers, accelerators, retarders, and air-entraining agents.

• Admixtures can also be used to reduce the carbon footprint of concrete.

• Admixtures are typically added to the concrete mix during batching.