Mumbai Metro Rail Corporation Interview Questions and Answers

Q1. What happens when cable is laid
Ans. 
When cable is laid, it is typically buried underground or installed overhead to provide electrical or communication connections.
• Cable is typically laid underground in trenches to protect it from damage and exposure to elements.

• Overhead cable installation involves attaching the cable to poles or structures above ground.

• Proper cable laying techniques are essential to ensure safety, reliability, and longevity of the infra
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Q2. What is the logic in railway line
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The logic in railway line involves the efficient movement of trains on tracks to ensure safety and timeliness.
• Railway lines are designed to allow trains to travel from one point to another efficiently.

• Tracks are laid out in a specific pattern to prevent collisions and ensure smooth operation.

• Signals and switches are used to control the movement of trains and prevent accidents.

• Schedules and timetables are created to opt...read more
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Q3. What is track circuit?
Ans. 
A track circuit is an electrical circuit used to detect the presence of trains on a railway track.
• Track circuits are typically installed along railway tracks to monitor the presence of trains by detecting their axles or wheels.

• They work by sending electrical current through the track and measuring changes in the current flow when a train is present.

• Track circuits are essential for signaling systems to ensure safe opera...read more
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Q4. What is the colour aspect through which the train gets the signal,
Ans. 
The colour aspect through which the train gets the signal is typically red, yellow, and green.
• Red signal indicates stop

• Yellow signal indicates caution

• Green signal indicates go

• These signals are used in railway traffic control systems
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Q5. Why is route aspect given in home signal?
Ans. 
Route aspect is given in home signal to indicate the route set for the train to follow.
• Route aspect helps the train operator know which track the train is cleared to proceed on.

• It ensures safe and efficient movement of trains by guiding them along the correct path.

• Different route aspects may indicate different routes or movements available to the train.

• Route aspect is crucial for preventing collisions and ensuring smoo
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Q1. Introduce yourself
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Q2. Why do you want to join services
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Q3. Why do you want to leave ONGC and join Railways
Ans. 
I am seeking new challenges and opportunities for growth in a different industry.
• Looking for new challenges and opportunities for personal growth

• Interested in exploring a different industry and gaining new experiences

• Seeking a change in work environment and culture

• Want to broaden my skill set and knowledge by working in a different sector
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Q4. Radiation equation
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Q5. Max Planck law and its implication
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Q1. Mechanical Engineer technical
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Q2. Vacuum place are welding possible??
Ans. 
Yes, welding in a vacuum is possible.
• Welding in a vacuum is possible because the absence of air prevents oxidation of the materials being welded.

• Specialized equipment and techniques are required for welding in a vacuum to ensure proper bonding of materials.

• Examples of welding in a vacuum include aerospace components and certain types of scientific equipment.
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Q1. Any technical questions
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Q2. As well as engineer drawing
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Manufacturing products are used in human life....

WENT BAD BY NOW FULLY GREAT

Q1. NEVER BLUFED IF IN "DOUBT" SAID CAN I MAKE A GUSS
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Q2. CALL BY REFERENCE IN C
Ans. 
Call by reference in C allows a function to modify the actual value of a variable passed as an argument.
• In call by reference, the address of the actual argument is passed to the function.

• Changes made to the parameter inside the function affect the original value outside the function.

• Example: void swap(int *a, int *b) { int temp = *a; *a = *b; *b = temp; }
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Gate level questions

Q1. Questions related to Soil mechanics and RCC
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Q2. Permeability, Effective Stress, Properties of Soil
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Q3. Shear Force and Bending Moment
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Q4. Grade of Concrete and Its significance
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Grade of concrete refers to its strength and is denoted by a number. Higher grade indicates higher strength.
• Grade of concrete is denoted by a number, such as M20, M30, etc.

• It signifies the strength of the concrete mix. For example, M20 means the mix has a compressive strength of 20 MPa.

• Higher grade concrete is used for structures requiring higher strength, like bridges and high-rise buildings.

• Lower grade concrete is us...read more
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Q5. Describe Yourself, Family background
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Q1. It was an on campus recruitment. There were 2 rounds of interview, 1st one was in virtual mode and questions were mainly HR type. 2nd one was face-to-face interview took place in ranchi at Mecon office. I...read more
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Q2. In 2nd round, the questions was totally core based, they asked me lot of mechanical questions based on my favorite topic. There were 3 Interviewer, and you can't fool them, they were very expert in it.
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