Knest Manufacturers Mechanical Engg. Design Interview Questions and Answers

MTTR stands for Mean Time To Repair and MTBF stands for Mean Time Between Failures.

• MTTR is the average time taken to repair a failed component or system.

• MTBF is the average time between failures of a component or system.

• MTTR is calculated as total downtime divided by the number of failures.

• MTBF is calculated as total uptime divided by the number of failures.

• For example, if a system has an MTTR of 2 hours and an MTBF of...read more

Data type string in PLC is used to store alphanumeric characters or text data.

• String data type is used to store text data in PLC programming.

• Strings can be used to store alphanumeric characters, words, sentences, etc.

• Example: STRING name := 'John Smith';

A cooling tower is a device used to remove heat from a building or industrial process.

• The function of a cooling tower is to cool down water or other fluids by extracting heat from them.

• Cooling towers are commonly used in HVAC systems, power plants, and industrial processes.

• They work by evaporating a small portion of the water, which removes heat and cools down the remaining water.

• The cooled water is then circulated bac...read more

To dismantle a boiler feed pump, follow these steps

• Isolate the pump from the power source and drain the water from the system

• Remove the coupling and motor from the pump

• Disconnect the suction and discharge piping from the pump

• Remove the bolts and nuts that hold the pump casing together

• Lift the casing off the pump and remove the impeller and shaft

• Inspect and clean all parts before reassembling or replacing