Junior Engineer Mechanical Maintenance Interview Questions and Answers

Steam is discharged from the body during winter bathing due to the difference in temperature between the body and the surrounding air.

• The body is warmer than the surrounding air, causing the moisture on the skin to evaporate and form steam.

• The steam is visible due to the cold air condensing the water vapor.

• This is a natural process and does not indicate any medical condition.

Control valve internal leakages can be checked through various methods.

• Performing a visual inspection of the valve and its components

• Using ultrasonic leak detection equipment

• Conducting a pressure drop test

• Performing a bubble test using a soap solution

• Checking the valve position indicator

• Analyzing the valve's performance data

• Regular maintenance and testing of the valve

Answering a question on Carbon-iron graph and roughness for Junior Engineer Mechanical Maintenance.

• Carbon-iron graph shows the relationship between carbon content and hardness of steel.

• Roughness is the measure of irregularities in a surface, usually measured in micrometers.

• It can affect the performance and lifespan of mechanical components.

• Surface roughness can be controlled through various machining processes such as grinding, polishing, and honing.

• Carbon-iron graph can be u...read more

Series and parallel connections are two types of electrical circuits used to connect components.

• In a series connection, components are connected end-to-end, so the current flows through each component in turn.

• In a parallel connection, components are connected side-by-side, so the current is divided among them.

• Series connections increase the total resistance and decrease the total current, while parallel connections decrease the total resistance and increase the total current....read more

Breaking failure can be solved by identifying the root cause and implementing corrective actions.

• Identify the root cause of the breaking failure

• Implement corrective actions such as repairing or replacing the broken parts

• Conduct regular maintenance and inspections to prevent future breaking failures

• Train employees on proper usage and maintenance of equipment

• Use high-quality materials and equipment to reduce the risk of breaking failures

Pump is used to transfer fluids while motor is used to convert electrical energy into mechanical energy.

• Pump is used to move fluids from one place to another while motor is used to rotate machinery.

• Pump has an inlet and outlet while motor has a rotor and stator.

• Pump is used in fluid systems while motor is used in mechanical systems.

• Examples of pumps include centrifugal pumps, positive displacement pumps, and axial flow pumps. Examples of motors include AC motors, DC motors, a...read more

Possible causes of slow hydraulic cylinder operation

• Low hydraulic fluid level

• Clogged or dirty hydraulic filter

• Worn out piston seals

• Leaking hydraulic lines

• Faulty control valve

• Incorrectly adjusted relief valve

• Excessive load on the cylinder

• Improperly sized cylinder for the application

The fuel system is responsible for delivering fuel to the engine for combustion.

• The fuel system includes the fuel tank, fuel pump, fuel filter, fuel injectors, and carburetor.

• The fuel pump draws fuel from the tank and sends it to the engine.

• The fuel filter removes impurities from the fuel before it reaches the engine.

• Fuel injectors spray fuel into the engine's combustion chamber, while a carburetor mixes fuel and air before sending it to the engine.

• The fuel system must be reg...read more