Bahwan Engineering Refrigeration and Air Conditioning Mechanic Interview Questions and Answers

Q1. How to convert from A.C to D.c. Supply
Ans. 
A.C to D.C. conversion can be done using a rectifier circuit.
• A rectifier circuit can be used to convert A.C. to D.C.

• The rectifier circuit can be half-wave or full-wave.

• Half-wave rectifier only allows half of the A.C. wave to pass through, while full-wave rectifier allows the entire wave.

• The rectifier circuit can be made using diodes.

• The output of the rectifier circuit is not smooth and requires filtering using capacito...read more
Answered by AI
View 1 more answer

Software or tool test

Q1. Related to technical question about fabrication.
Add your answer
Q2. Tool related question
Add your answer

Q1. Steel and shuttering releted questions
Add your answer

Q1. Expectation releted questions
Add your answer

Q1. What is blinding? Different types of blinds used in o&g?
Ans. 
Blinding is the process of isolating a section of a pipeline or equipment to prevent flow or contamination.
• Temporary or permanent blinds can be used depending on the situation

• Common types of blinds include spectacle blinds, paddle blinds, and bleed rings

• Blinding is often used during maintenance or repair work to ensure safety

• Blinding can also be used to prevent contamination during storage or transportation

• Blinding can...read more
Answered by AI
Add your answer
Q2. Procedures before starting a work in a refinery equipment,
Ans. 
Before starting work in a refinery equipment, certain procedures must be followed.
• Obtain a work permit

• Perform a safety check of the equipment

• Ensure proper personal protective equipment is worn

• Verify that all valves are in the correct position

• Confirm that the equipment is properly grounded

• Check for any leaks or abnormal conditions

• Communicate with other workers in the area

• Follow all established procedures and protocols
Answered by AI
Add your answer
Q3. What will you do if there's an H2S leak and there's no wind movement,
Ans. 
I will follow the emergency response plan and evacuate the area immediately.
• Activate the alarm system to alert others in the area

• Put on personal protective equipment (PPE) including a respirator

• Evacuate the area immediately and move to a safe location

• Notify emergency services and follow the emergency response plan

• Monitor the situation and wait for the all-clear signal before returning to the area
Answered by AI
Add your answer
Q4. From where you'll advice your workers to start unbloting a heat exchanger head?
Ans. 
I would advise my workers to start unbolting the heat exchanger head from the top and work their way down.
• Start from the top and work your way down

• Use appropriate tools and safety equipment

• Follow proper procedures and guidelines

• Ensure all bolts are properly labeled and accounted for

• Inspect the gasket and replace if necessary
Answered by AI
Add your answer

Q1. Stress strain curves
Add your answer
Q2. Asme codes for oil and gas
Ans. 
ASME codes are widely used in the oil and gas industry to ensure safety and quality standards are met.
• ASME B31.3 is the code for process piping in oil and gas facilities

• ASME Section VIII is used for pressure vessels in oil and gas industry

• ASME B31.4 is for liquid pipelines in oil and gas industry
Answered by AI
Add your answer

Q1. On core subject, logical questions
Add your answer

Q1. About Bio, As per resume
Add your answer