Comau Interview Questions and Answers

Argon gas is commonly used in gas arc welding.

• Argon gas is the most commonly used gas in gas arc welding.

• It is used as a shielding gas to protect the weld from atmospheric contamination.

• Argon gas provides a stable arc and helps to prevent oxidation during the welding process.

• Other gases like helium and carbon dioxide can also be used depending on the specific welding requirements.

A synchromesh gearbox is a type of manual transmission that uses synchronizers to match the speed of the gears before engaging them.

• Synchromesh gearbox uses synchronizers to match the speed of the gears before engaging them

• Synchronizers are small collars that help to match the speed of the gears

• Synchromesh gearbox allows for smoother and faster gear changes

• Synchromesh gearbox is commonly used in modern cars

• Synchromesh gearbox is more expensive than non-synchromesh gearbox

Otto cycle is used in gasoline engines while diesel cycle is used in diesel engines.

• Otto cycle has constant volume heat addition while diesel cycle has constant pressure heat addition.

• Otto cycle has higher thermal efficiency than diesel cycle.

• Diesel cycle has higher compression ratio than Otto cycle.

• Diesel cycle has lower exhaust gas temperature than Otto cycle.

• Diesel cycle has higher NOx emissions than Otto cycle.

A multi speed gearbox is designed to provide different gear ratios for efficient power transfer at different speeds.

• The gearbox should have multiple gear ratios to match the engine's power output with the vehicle's speed.

• The gear ratios should be evenly spaced to ensure smooth shifting.

• The gearbox should be designed to handle the torque and power of the engine.

• The gearbox should be lightweight and compact for efficient use of space.

• The gearbox should be easy to operate and ma...read more

A dog clutch is a type of clutch that is used to engage and disengage gears in a manual transmission.

• It is used to connect and disconnect the engine from the transmission

• It is called a dog clutch because of the way the teeth on the clutch engage with the gears

• It is commonly used in racing cars and motorcycles

• It allows for quick and smooth gear changes

Arc welding is a welding process that uses an electric arc to melt and join metals.

• Electric current is used to create an arc between the base metal and the electrode

• The heat generated by the arc melts the base metal and the electrode, which mix together to form a weld pool

• As the weld pool cools, it solidifies and forms a strong joint between the two metals

• Different types of arc welding include shielded metal arc welding, gas metal arc welding, and flux-cored arc welding