Poona Shims Interview Questions and Answers

Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points.

• Ohm's law is a fundamental law of electrical engineering

• It states that the current through a conductor is directly proportional to the voltage across it

• The proportionality constant is the resistance of the conductor

• Ohm's law is often used to calculate the current, voltage, or resis...read more

DOL starter is a type of motor starter used to start and stop the motor directly on line.

• DOL stands for Direct-On-Line

• It is the simplest and most economical type of motor starter

• It consists of a contactor and an overload relay

• It is used for small to medium-sized motors

• Example: A DOL starter is used to start a water pump motor

A dol starter diagram is a simple electrical circuit used to start and stop motors.

• DOL stands for Direct-On-Line

• It consists of a contactor, overload relay, start and stop push buttons, and power supply

• When the start button is pressed, the contactor closes and the motor starts

• When the stop button is pressed, the contactor opens and the motor stops

• Overload relay protects the motor from overheating and damage

Preventive maintenance is a proactive approach to maintenance that involves regularly scheduled inspections and repairs to prevent equipment failure.

• Create a maintenance schedule based on manufacturer recommendations and equipment usage

• Perform regular inspections to identify potential issues before they become major problems

• Replace worn or damaged parts before they fail

• Keep accurate records of maintenance activiti...read more

The hole size for 16 mm tapping depends on the type of thread and material being tapped.

• The recommended hole size for a 16 mm tapping with a coarse thread in steel is 14.5 mm.

• For a fine thread in aluminum, the recommended hole size is 15.5 mm.

• It is important to consult a tap drill chart to determine the appropriate hole size for the specific tapping operation.

• Factors such as material type, thread type, and tap geo...read more

The recommended hole size for M8 tapping is 6.8mm.

• The hole size should be 1.25 times the major diameter of the tap.

• For M8 tapping, the major diameter is 8mm, so the hole size should be 6.8mm.

• The hole should be drilled to a depth of at least 1.5 times the diameter of the tap.

• Use a tap drill chart to determine the correct hole size for other tapping sizes.