DBM Geotechnics & Constructions Maintenance Engineer Interview Questions and Answers

The weight of green concrete varies depending on the mix design and components used.

• The weight of green concrete typically ranges from 140 to 150 pounds per cubic foot.

• Factors such as the type and amount of aggregates, cement, water, and admixtures used can affect the weight.

• Lightweight concrete can have a lower weight, while high-density concrete can be heavier.

• The weight of green concrete is important for structural

The formula for tensile strength of concrete is based on the cross-sectional area and maximum load applied.

• Tensile Strength = Maximum Load / Cross-sectional Area

• The units for tensile strength are typically in MPa (megapascals)

• Tensile strength is an important property of concrete for determining its ability to resist tension forces

• For example, if a concrete specimen with a cross-sectional area of 100 square millimeters ...read more

The water cement ratio of concrete refers to the ratio of the weight of water to the weight of cement used in a concrete mix.

• The water cement ratio is a crucial factor in determining the strength and durability of concrete.

• A lower water cement ratio results in stronger and more durable concrete.

• The ideal water cement ratio varies depending on the type of concrete mix and its intended use.

• For example, a typical water ce...read more

IS code of steel refers to the Indian Standard code for steel materials and products.

• IS 2062:2011 - Steel for general structural purposes

• IS 1786:2008 - High strength deformed steel bars and wires for concrete reinforcement

• IS 8500:1991 - Structural steel - Microalloyed (medium and high strength qualities)

AMC stands for Annual Maintenance Contract.

• AMC is a contract between a service provider and a client for the maintenance of equipment or property.

• It typically covers regular maintenance, repairs, and replacements.

• AMC can be for various types of equipment such as computers, air conditioners, elevators, etc.

• The contract can be for a year or more depending on the agreement between the parties.

• AMC ensures that the equipmen...read more

AQC stands for Air Quality Control.

• AQC is a system that monitors and controls the quality of air in a given environment.

• It is used in various industries such as manufacturing, healthcare, and hospitality.

• AQC systems can detect and remove pollutants, regulate temperature and humidity, and prevent the spread of airborne diseases.

• Examples of AQC systems include air purifiers, HVAC systems, and ventilation systems.

Penetration test is a method of evaluating the security of a computer system or network by simulating an attack from a malicious source.

• Penetration test involves identifying vulnerabilities in a system or network.

• It includes attempting to exploit these vulnerabilities to determine the potential impact of a real attack.

• The goal of a penetration test is to strengthen the security defenses of the system or network.

• Common ...read more

Waterproofing is a process of making a structure or material resistant to the penetration of water.

• Waterproofing involves applying materials or coatings to prevent water from seeping through surfaces.

• It is commonly used in construction to protect buildings from water damage.

• Examples of waterproofing materials include bituminous coatings, cementitious waterproofing, and liquid membrane systems.

Types of foundation include shallow, deep, and pile foundations.

• Shallow foundations are used when the soil is strong enough to support the structure's weight, such as spread footings and mat foundations.

• Deep foundations are used when the soil is weak and unable to support the structure's weight, such as pile foundations and drilled piers.

• Pile foundations are deep foundations that consist of long, slender columns driven...read more