Aakash Oil Field Services Interview Questions and Answers

A rectifier is an electrical device that converts alternating current (AC) to direct current (DC).

• Rectifiers are commonly used in power supplies to convert AC voltage to DC voltage.

• They are made up of diodes, which allow current to flow in only one direction.

• Rectifiers can be half-wave or full-wave, depending on the number of diodes used.

• Examples of rectifiers include bridge rectifiers, vacuum tube rectifiers, and soli

SCR stands for Selective Catalytic Reduction. It is a technology used to reduce nitrogen oxide emissions from diesel engines.

• SCR is a process that uses a catalyst to convert nitrogen oxides (NOx) into nitrogen (N2) and water (H2O).

• It involves injecting a urea-based solution, known as diesel exhaust fluid (DEF), into the exhaust stream.

• The DEF reacts with the NOx in the presence of the catalyst, breaking it down into ha...read more

The main reason for belt joint failure is usually due to improper installation or maintenance.

• Improper installation of the belt joint, such as incorrect alignment or tensioning

• Lack of proper maintenance, leading to wear and tear of the joint

• Use of low-quality materials for the joint

• Excessive load or stress on the belt joint

• Environmental factors like temperature or humidity affecting the joint

The alignment maximum tolerance refers to the maximum allowable deviation from the specified alignment.

• Alignment maximum tolerance is the maximum allowable deviation from the specified alignment.

• It is typically expressed in terms of a percentage or a specific measurement unit.

• For example, a machine part may have an alignment maximum tolerance of +/- 0.005 inches.

• Exceeding the alignment maximum tolerance can lead to per

To replace the bucket wheel reclaimer luffing cylinder, follow these steps.

• 1. Shut down the machine and ensure all power sources are disconnected.

• 2. Remove any surrounding components that may obstruct access to the luffing cylinder.

• 3. Use appropriate tools to disconnect the hydraulic hoses and fittings from the cylinder.

• 4. Support the weight of the cylinder as it is removed to prevent damage to surrounding components.

• 5...read more

JSA stands for Job Safety Analysis, focusing on specific job tasks, while HIRA stands for Hazard Identification and Risk Assessment, focusing on overall workplace hazards.

• JSA is task-specific, focusing on individual job tasks and potential hazards

• HIRA is broader, looking at overall workplace hazards and assessing risks

• JSA involves breaking down a job into steps and identifying potential hazards for each step

• HIRA involv...read more

To create a PR in SAP, you can use transaction code ME51N or ME21N.

• Use transaction code ME51N to create a purchase requisition in SAP.

• Enter the necessary details such as material, quantity, delivery date, etc.

• Save the purchase requisition and it will be created in the system.

• Alternatively, you can also use transaction code ME21N to create a purchase order directly.

The procedure of pulley replacement involves identifying the faulty pulley, removing the old pulley, installing the new pulley, and testing the system.

• Identify the faulty pulley by checking for any signs of wear or damage.

• Use appropriate tools to remove the old pulley, such as a pulley puller or wrench.

• Install the new pulley by aligning it properly and securing it in place.

• Test the system to ensure the new pulley is fu...read more

PTW stands for Permit to Work, a procedure used to ensure that work is carried out safely in potentially hazardous environments.

• PTW is a formal written system used to control certain types of work that are identified as potentially hazardous.

• Before starting work, a permit must be obtained from a designated authority.

• The permit outlines the work to be done, the hazards involved, and the necessary precautions to be taken...read more