10+ Srei Equipment Finance Interview Questions and Answers

Technical interview questions on IC engines, machining operations, welding, casting, heat treatment, thermodynamics, materials, and mechanics.

• IC engine types include spark ignition (SI) and compression ignition (CI)

• Otto cycle is used in SI engines while Diesel cycle is used in CI engines

• Welding types include MIG, TIG, and stick welding

• Casting types include sand casting, investment casting, and die casting

• Heat treatment processes include annealing, quenching, and tempering

• Ther...read more

Dual cycle principles involve both constant volume and pressure processes in an engine cycle.

• Dual cycle is a combination of Otto and Diesel cycles.

• It involves two constant volume and one constant pressure processes.

• The first constant volume process is isentropic compression.

• The constant pressure process is combustion.

• The second constant volume process is isentropic expansion.

• It is used in gas turbine engines and some internal combustion engines.

The question is about the basics of automobile engines and the differences between Otto, Dual, and Diesel cycles.

• Automobile is a vehicle powered by an engine that converts fuel into mechanical energy.

• Otto cycle is a four-stroke combustion cycle used in gasoline engines.

• Dual cycle is a modified version of the Otto cycle that includes a constant volume heat addition process.

• Diesel cycle is a four-stroke combustion cycle used in diesel engines.

• The main difference between these c...read more

The Otto cycle is a constant volume process used in internal combustion engines.

• The Otto cycle consists of four processes: intake, compression, combustion, and exhaust.

• During the intake process, the fuel-air mixture is drawn into the cylinder.

• During the compression process, the mixture is compressed to a smaller volume, increasing its temperature and pressure.

• During the combustion process, the mixture is ignited, causing a rapid increase in pressure and temperature.

• During the...read more

Coefficient of performance (COP) is the ratio of output heat to input work or energy.

• COP is used to measure the efficiency of a heat pump or refrigeration system.

• It is calculated by dividing the output heat by the input work or energy.

• A higher COP indicates a more efficient system.

• For example, a heat pump with a COP of 3 can produce three units of heat for every unit of energy input.

• COP can also be expressed in terms of cooling instead of heating.

• In this case, it is the ratio...read more

Heat treatment processes involve heating and cooling metals to alter their properties.

• Heat treatment processes involve heating metals to specific temperatures and then cooling them at controlled rates.

• Common heat treatment processes include annealing, tempering, quenching, and normalizing.

• These processes can change the hardness, strength, toughness, and other properties of metals.

• For example, quenching involves rapid cooling to increase hardness, while tempering involves rehe...read more

Surface tension is the property of a liquid that allows it to resist an external force due to the cohesive nature of its molecules.

• Surface tension is caused by the attraction between the molecules of a liquid, which creates a 'skin' on the surface of the liquid.

• It is responsible for phenomena like capillary action, where liquids rise in narrow tubes against the force of gravity.

• Surface tension can be observed in everyday life, such as when water forms droplets on a surface in...read more

Efficiency of Carnot cycle is given by T1/T2-T1

• Efficiency of Carnot cycle is the maximum possible efficiency of a heat engine

• It depends only on the temperatures of the hot and cold reservoirs

• Efficiency = 1 - (T1/T2)

• T1 is the temperature of the cold reservoir and T2 is the temperature of the hot reservoir

POWER system optimization is the process of improving the efficiency and reliability of power systems.

• It involves analyzing and modeling power systems to identify areas for improvement.

• Optimization techniques such as load balancing and voltage regulation are used to improve efficiency.

• Reliability can be improved through measures such as redundancy and fault detection.

• Examples of optimization tools include power flow analysis software and advanced control systems.

• The goal of p...read more

Mass is the amount of matter in an object, while weight is the force of gravity acting on an object.

• Mass is a scalar quantity and is measured in kilograms or grams.

• Weight is a vector quantity and is measured in newtons.

• Mass remains constant regardless of location, while weight changes depending on the gravitational pull.

• For example, a person with a mass of 70 kg will have a weight of approximately 686 newtons on Earth, but only 114 newtons on the Moon.

Stress is the force applied to a material, while strain is the resulting deformation or change in shape.

• Stress is the external force acting on an object, measured in units like Newtons per square meter (N/m^2) or Pascals (Pa).

• Strain is the measure of deformation or change in shape of a material due to stress, expressed as a ratio or percentage.

• Example: When you stretch a rubber band (apply stress), it elongates (strain) until it reaches its breaking point.