Vaaman Engineers Senior Technician Interview Questions, Process, and Tips

Ohm's law states that the current flowing through a conductor is directly proportional to the voltage across it, and inversely proportional to the resistance of the conductor.

• Ohm's law is represented by the formula V = IR, where V is voltage, I is current, and R is resistance.

• It helps in calculating the current, voltage, or resistance in a circuit when the other two values are known.

• For example, if a circuit has a volt...read more

The diameter of binding wire used in construction varies depending on the type of construction work.

• The diameter of binding wire used in construction ranges from 0.9 mm to 1.6 mm.

• Thicker binding wire is used for heavy-duty construction work.

• Thinner binding wire is used for lighter construction work.

• The most commonly used binding wire diameter in construction is 1.2 mm.

• The diameter of binding wire is important as it aff...read more

The aim of construction in site is to create a safe, functional and aesthetically pleasing structure.

• Ensure safety of workers and public

• Meet functional requirements of the structure

• Create an aesthetically pleasing design

• Use appropriate materials and techniques

• Adhere to building codes and regulations

The minimum grade of RCC is M20.

• RCC stands for Reinforced Cement Concrete.

• The grade of RCC is determined by the compressive strength of concrete.

• M20 grade means the compressive strength of concrete is 20 N/mm².

• Higher grades of RCC are used for structures that require higher strength, such as bridges and high-rise buildings.

PSC is pre-stressed concrete while RCC is reinforced concrete.

• PSC has pre-stressed steel while RCC has reinforcing steel.

• PSC is stronger and more durable than RCC.

• PSC is used in bridges, high-rise buildings, and other structures that require high strength and durability.

• RCC is used in residential and commercial buildings, bridges, and other structures that require moderate strength and durability.

Minimum steel diameter depends on various factors such as load, span, and type of structure.

• Minimum steel diameter is determined by the design engineer based on the load and span of the structure.

• The type of structure also plays a role in determining the minimum steel diameter.

• For example, a bridge would require a larger diameter steel than a residential building.

• The minimum steel diameter is also influenced by the typ...read more

Several tools are required for pile installation on site.

• The number of tools required for pile installation depends on the type of pile being installed.

• Some common tools required for pile installation include pile hammers, augers, drilling rigs, cranes, and vibratory hammers.

• The number of tools required also depends on the size and depth of the pile being installed.

• Other factors such as soil conditions and accessibilit...read more

The output voltage of a VFD varies based on frequency and load, typically ranging from 0 to the input voltage.

• VFD output voltage is adjustable, allowing control over motor speed and torque.

• The output voltage is proportional to the frequency; as frequency increases, voltage increases.

• Commonly, VFDs output a three-phase voltage to drive three-phase motors.

• For example, a 480V VFD can output up to 480V at its maximum frequ...read more

Motor protection involves safeguarding electric motors from damage due to overloads, short circuits, and other electrical faults.

• Overload protection prevents motors from drawing excessive current, which can cause overheating.

• Short circuit protection disconnects power when a fault occurs, preventing damage to the motor and connected equipment.

• Phase failure protection detects loss of one or more phases, which can lead to...read more

Wiring and boards are essential components of electrical systems.

• Wiring refers to the physical connections between electrical components.

• Boards are used to organize and control the flow of electricity.

• Proper wiring and board design are crucial for safety and efficiency.

• Examples of boards include circuit breaker panels and control boards for industrial machinery.

Electrical maintenance involves regular inspections, repairs, and upgrades to ensure safe and efficient electrical systems.

• Routine inspections to identify wear and tear, such as checking circuit breakers and wiring.

• Testing and replacing faulty components, like light fixtures or outlets.

• Upgrading systems to meet current codes, for example, installing GFCI outlets in wet areas.

• Performing preventive maintenance to avoid f...read more