Daimler India Commercial Vehicles Diploma Trainee Engineer Interview Questions and Answers

Moulding is a manufacturing process of shaping liquid or pliable raw material using a rigid frame called a mold.

• Types of moulding: injection moulding, blow moulding, compression moulding, rotational moulding, etc.

• Forging is a manufacturing process of shaping metal using compressive forces.

• LPDC stands for Low Pressure Die Casting, a casting process for producing metal parts.

• Materials used for moulding: plastic, rubber,

There are three types of heat transfer: conduction, convection, and radiation.

• Conduction is the transfer of heat through direct contact between solids.

• Convection is the transfer of heat through the movement of fluids (liquids or gases).

• Radiation is the transfer of heat through electromagnetic waves.

• Examples: Conduction - touching a hot stove; Convection - boiling water; Radiation - feeling the warmth of the sun.

A boiler is a closed vessel used to generate steam or hot water for heating purposes. There are various types of boilers.

• Boilers are used in industries, power plants, and residential buildings.

• Types of boilers include fire-tube, water-tube, electric, and biomass boilers.

• Boilers can be fueled by coal, oil, gas, or renewable energy sources.

• Boilers require regular maintenance to ensure safety and efficiency.

• Boiler efficie...read more

A jig is a tool used to guide and control the movement of a cutting tool, while a fixture is used to hold and position a workpiece during machining.

• Jigs are used to guide the cutting tool, while fixtures hold the workpiece.

• Jigs are used in drilling, reaming, and tapping operations, while fixtures are used in milling, grinding, and turning operations.

• Jigs are often custom-made for specific operations, while fixtures can...read more

Mechanisms are devices that transmit or transform motion, force, or energy from one component to another.

• There are four types of mechanisms: lever, pulley, wheel and axle, and inclined plane.

• Lever mechanisms involve a rigid bar that pivots around a fixed point.

• Pulley mechanisms use a wheel and rope to transmit force.

• Wheel and axle mechanisms involve a wheel rotating around a central axis.

• Inclined plane mechanisms use a...read more

2D diagrams are flat while 3D diagrams have depth and volume.

• 2D diagrams are represented on a flat surface while 3D diagrams have depth and volume.

• 2D diagrams are used to represent objects or structures in a two-dimensional plane while 3D diagrams are used to represent objects or structures in a three-dimensional space.

• 2D diagrams are commonly used in engineering drawings, architectural plans, and circuit diagrams whil...read more

Vernier caliper is a precision measuring tool used to measure length, diameter, depth, and thickness.

• Clean the measuring surfaces before use

• Close the jaws and check if the zero mark on the vernier scale aligns with the zero mark on the main scale

• Place the object to be measured between the jaws and tighten the lock screw

• Read the measurement from the main scale and the vernier scale

• Add the two readings to get the final m...read more

The micrometre least count formula is the ratio of the pitch of the screw gauge to the number of divisions on the circular scale.

• The formula is LC = Pitch / Number of divisions on circular scale

• LC stands for least count

• Pitch is the distance moved by the spindle per revolution

• The number of divisions on the circular scale is the number of equally spaced divisions on the circular scale

• The formula is used to calculate the ...read more

The second law of thermodynamics states that the total entropy of a closed system always increases over time.

• Entropy of a system tends to increase over time

• Heat cannot spontaneously flow from a colder location to a hotter location

• Efficiency of a heat engine is always less than 100%

• Entropy of the universe is always increasing