Gmmco Service Engineer Interview Questions, Process, and Tips

Q1. Disel engine combustion process
Ans. 
The diesel engine combustion process involves the ignition of fuel injected into the combustion chamber by compressed air.
• Diesel fuel is injected into the combustion chamber at high pressure

• The air in the combustion chamber is compressed by the piston, leading to high temperatures

• The high temperature air ignites the fuel, leading to combustion and the generation of power

• The combustion process in diesel engines is more
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Q2. What is two & four stroke engine.
Ans. 
A two-stroke engine completes a power cycle in two strokes of the piston, while a four-stroke engine completes it in four strokes.
• Two-stroke engines have a simpler design with fewer moving parts compared to four-stroke engines.

• Two-stroke engines typically produce more power for their size but are less fuel-efficient and emit more pollution.

• Four-stroke engines are more common in cars, motorcycles, and larger machinery d...read more
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Q3. What's is hydraulic component.
Ans. 
A hydraulic component is a device that utilizes fluid power to perform mechanical tasks.
• Hydraulic components use liquid to transmit power.

• Common examples include hydraulic cylinders, pumps, motors, valves, and hoses.

• They are often used in heavy machinery, construction equipment, and industrial applications.
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Q4. What is realy,and working principle
Ans. 
Realy is a type of relay used in electrical systems to control high power devices with low power signals.
• Relays are switches that open and close circuits electromechanically

• Realy is a type of relay specifically designed for high power applications

• Working principle involves an electromagnet that moves an armature to open or close the circuit

• Commonly used in industrial automation, automotive, and HVAC systems
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Q5. Least count of all megerment.
Ans. 
Least count is the smallest change in the measured quantity that can be detected by the measuring instrument.
• Least count is determined by the smallest division on the scale of the measuring instrument.

• It is important for accurate measurements and precision in engineering.

• For example, a ruler with millimeter divisions has a least count of 1 mm.

• A vernier caliper with 0.1 mm divisions has a least count of 0.1 mm.
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Q1. Step by procedure if boom life is not working
Ans. 
The step-by-step procedure if boom life is not working
• Check the power supply to the boom lift

• Inspect the control panel for any error codes or indicators

• Ensure all safety switches are engaged properly

• Inspect the hydraulic system for any leaks or malfunctions

• Check the boom lift's batteries and charging system

• Verify if the emergency stop button is engaged or if any other safety features are activated

• Consult the boom lift'...read more
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Q2. How to cheack boom hoist
Ans. 
To check boom hoist, inspect the wire rope, drum, brake, and hydraulic system.
• Inspect the wire rope for any signs of wear or damage.

• Check the drum for any cracks or deformities.

• Test the brake to ensure it is functioning properly.

• Inspect the hydraulic system for any leaks or malfunctions.

• Perform load testing to ensure the boom hoist can handle the required weight.

• Check the boom hoist control system for any faults or err
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Q3. Make sure that boom hoist properly attached and aligned make sure that hoist cable is correctly positioned and that boom is not bend or damaged
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Q1. How many types of cranes
Ans. 
There are several types of cranes used in various industries for lifting and moving heavy objects.
• Mobile cranes: These are versatile cranes mounted on wheels or tracks and can be easily transported to different locations.

• Tower cranes: These are tall cranes often used in construction sites to lift heavy materials to great heights.

• Overhead cranes: These cranes are typically used in factories or warehouses to move heavy l...read more
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Two easy level and one medium level code

Q1. From resume and project
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