Uni Deritend Engineer Trainee Interview Questions and Answers for Experienced

Power of a pump is the rate at which it does work or transfers energy.

• Power of a pump is measured in watts (W) or horsepower (hp).

• It is calculated by multiplying the flow rate of the pump by the total head.

• Higher power pumps are capable of moving fluids at a faster rate.

• Efficiency of a pump also affects its power output.

Head loss is the reduction in the total energy of a fluid as it flows through a pipe or duct due to friction, bends, expansions, or contractions.

• Head loss is typically expressed in units of length (e.g. meters or feet)

• It is caused by factors such as friction between the fluid and the pipe walls, changes in flow direction, and changes in pipe diameter

• Head loss can be calculated using equations such as the Darcy-Weisbach...read more

Refrigeration cycle is a thermodynamic cycle used in refrigerators and air conditioning systems to transfer heat from a low temperature reservoir to a high temperature reservoir.

• Consists of four main components: compressor, condenser, expansion valve, and evaporator

• Refrigerant is compressed in the compressor, then condensed in the condenser, expanded in the expansion valve, and evaporated in the evaporator

• Heat is absor...read more

Refrigeration theory involves the transfer of heat from a low temperature region to a high temperature region using a refrigerant.

• Refrigeration is based on the principles of thermodynamics, specifically the second law which states that heat naturally flows from a higher temperature to a lower temperature.

• The refrigeration cycle consists of four main components: compressor, condenser, expansion valve, and evaporator.

• The...read more