MOIL Junior Engineer Interview Questions and Answers

Press filter is a device used for separating solids from liquids.

• It works by applying pressure to the mixture to force the liquid through a filter media while retaining the solids.

• It is commonly used in industries such as chemical, pharmaceutical, and food processing.

• Examples of press filters include belt filter press, plate and frame filter press, and rotary vacuum-drum filter.

• Press filters are efficient and cost-effe...read more

To maintain pressure in press filter, ensure proper sealing, check for leaks, and adjust feed rate and pressure settings.

• Check for proper sealing of the filter plates and gaskets

• Inspect for any leaks in the system and repair them promptly

• Adjust the feed rate and pressure settings as per the manufacturer's recommendations

• Regularly clean and maintain the filter to prevent clogging and pressure drop

• Monitor the pressure ga...read more

The model of hydraulic cylinder in press filter depends on the specific press filter being used.

• The model of hydraulic cylinder can vary depending on the size and capacity of the press filter.

• Some common models of hydraulic cylinders used in press filters include tie rod cylinders and welded cylinders.

• The specific model of hydraulic cylinder used in a press filter can be determined by consulting the manufacturer's spec...read more

Roller bearings are commonly used in bogie wheels.

• Roller bearings are preferred over plain bearings due to their ability to handle heavy loads and reduce friction.

• Tapered roller bearings are commonly used in locomotive bogie wheels.

• Cylindrical roller bearings are also used in some bogie wheels.

• The type of bearing used depends on the specific application and load requirements.

Different bolt grades are used for various applications based on their strength and durability.

• Bolt grades are typically indicated by numbers or letters, such as Grade 2, Grade 5, Grade 8, etc.

• Higher grade bolts have higher strength and are used in applications where greater load-bearing capacity is required.

• Common grades include Grade 2, Grade 5, Grade 8, and stainless steel bolts.

• Each grade has specific properties an...read more

Causes of hot bearings include lack of lubrication, overloading, misalignment, and contamination.

• Lack of lubrication: Insufficient or degraded lubricant can cause increased friction and heat.

• Overloading: Excessive load on the bearing can lead to overheating.

• Misalignment: Improper alignment of the bearing can cause it to operate under stress and generate heat.

• Contamination: Foreign particles or debris in the bearing can

Over-heating of Commutator in a DC motor can be caused by factors like excessive current, poor ventilation, dirty environment, and worn-out brushes.

• Excessive current flowing through the motor can cause the commutator to overheat.

• Poor ventilation around the motor can lead to inadequate cooling, resulting in overheating.

• A dirty environment can cause dust and debris to accumulate on the commutator, hindering heat dissipat...read more

The shunt motor will run at dangerously high speeds and may get damaged.

• The motor will run at its no-load speed, which is much higher than its rated speed.

• This can lead to overheating and mechanical stress on the motor components.

• The motor may get damaged or fail prematurely if directly connected to the supply line.

Various types of engines and their origin countries

• Internal Combustion Engine - Germany

• Steam Engine - United Kingdom

• Jet Engine - United States

• Electric Engine - Various countries

• Rocket Engine - Various countries