Cracku Interview Questions and Answers

A portrait engine diesel engine is a type of internal combustion engine with a capacity typically ranging from 1.5L to 3.0L and a compression ratio of around 16:1.

• Portrait engine diesel engines are commonly used in passenger cars and light-duty trucks.

• They are known for their fuel efficiency and torque output.

• Examples of portrait engine diesel engines include the Ford EcoBlue 2.0L and the Volkswagen TDI 1.6L.

• The high compression ratio in these engines helps in achieving bette...read more

Gears are mechanical components used to transmit motion and power between rotating shafts. There are various types of gears including spur, helical, bevel, and worm gears.

• Gears are toothed mechanical components that mesh together to transmit motion and power.

• Spur gears have straight teeth and are the most common type of gear.

• Helical gears have angled teeth for smoother and quieter operation.

• Bevel gears have cone-shaped teeth and are used to change the direction of rotation.

• Wo...read more

Tolerance refers to the allowable deviation from a specified dimension or value in engineering.

• Tolerance is important in manufacturing to ensure that parts fit together properly.

• It is typically specified as a range, such as +/- 0.1mm.

• Tolerance can be applied to dimensions, angles, surface finishes, and other characteristics.

• For example, a hole may have a tolerance of +/- 0.05mm to allow for variations in the drilling process.

The stress-strain curve shows the relationship between stress (force applied) and strain (resulting deformation) in a material.

• The curve typically consists of several distinct regions: elastic deformation, yield point, plastic deformation, and ultimate failure.

• In the elastic region, the material deforms elastically and returns to its original shape when the stress is removed.

• The yield point is where the material transitions from elastic to plastic deformation.

• Plastic deformat...read more

The stress-strain diagram for R15 material shows the relationship between stress and strain for that specific material.

• The stress-strain diagram typically consists of a linear elastic region, a yield point, plastic deformation, and ultimate failure.

• R15 material may exhibit different characteristics compared to other materials, so the specific diagram would show its unique behavior.

• The diagram helps engineers understand how the material responds to applied forces and predict i...read more