Vaaman Engineers Maintenance Engineer Interview Questions and Answers

Answering questions on Vogele paver screed function and diesel engine BS iv & BS VI

• Vogele paver screed function involves leveling and compacting asphalt or concrete surfaces

• Temper/pressure bar applications involve adjusting the temperature and pressure of the screed to achieve desired results

• BS IV and BS VI are emission standards for diesel engines, with BS VI being more stringent and requiring advanced technology to r...read more

Gears are mechanical components that transmit power and motion between rotating shafts. There are various types of gears.

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

• Helical gears have angled teeth and provide smoother operation.

• Bevel gears transmit power between shafts that are not parallel.

• Worm gears have a screw-like thread and are used for high reduction ratios.

• Planetary gears have a central gear tha...read more

Stress is the force applied per unit area, while strain is the deformation caused by stress.

• Stress is measured in units of force per unit area, such as pounds per square inch (psi) or newtons per square meter (N/m²).

• Strain is the ratio of the change in length or shape of an object to its original length or shape.

• Stress and strain are related by the material's modulus of elasticity, which is a measure of how much the ma...read more

A centrifugal pump is a mechanical device that uses centrifugal force to transport fluids. There are two types: radial and axial.

• Centrifugal pumps are commonly used in industrial and domestic applications.

• Radial pumps have a volute casing and are used for low flow and high head applications.

• Axial pumps have a propeller and are used for high flow and low head applications.

• Centrifugal pumps are easy to install and mainta...read more

SI and CI engines are types of internal combustion engines used in vehicles and machinery.

• SI engine stands for Spark Ignition engine, also known as gasoline engine.

• CI engine stands for Compression Ignition engine, also known as diesel engine.

• SI engines use a spark plug to ignite the fuel-air mixture, while CI engines use compression to ignite the fuel.

• SI engines are commonly used in cars, motorcycles, and small machine...read more

Knocking is a phenomenon where the air-fuel mixture in the engine cylinder ignites spontaneously before the spark plug fires.

• Knocking is also known as detonation or pinging.

• It can cause engine damage if not addressed.

• It occurs when the air-fuel mixture in the cylinder ignites prematurely due to high pressure and temperature.

• It can be caused by low-quality fuel, incorrect ignition timing, or engine overheating.

• To preven...read more

Basic principle of working refers to the fundamental concept or theory behind the functioning of a mechanical system.

• It explains how a mechanical system operates and produces the desired output.

• It is essential to understand the basic principle of working to design, develop, and maintain mechanical systems.

• For example, the basic principle of working of an internal combustion engine is the conversion of fuel energy into ...read more