Compressors, Gas Turbines And Jet Engines MCQ Questions & Answers | Mechanical Engineering

In the context of gas turbine blades, the most important property among the given options is Creep. Creep is a time-dependent deformation that occurs under constant load and elevated temperatures. Gas turbine blades operate in high-temperature environments and are subjected to significant mechanical and thermal stresses.

Explanation for each option:

Toughness: While toughness is important for impact resistance, it is not as critical as creep in the high-temperature and constant-load conditions experienced by gas turbine blades.
Fatigue: Fatigue is relevant for cyclic loading, but the continuous and high-temperature operation of gas turbine blades makes creep a more crucial consideration.
Creep: Creep resistance is crucial as gas turbine blades are exposed to prolonged high temperatures and constant loads during operation.
Corrosion resistance: While corrosion resistance is important for durability, it is not the primary concern when compared to the high-temperature creep behavior.

Therefore, in the context of the question, the most important property for a material used for gas turbine blades is Creep.

The main purpose of reheating is to avoid excess moisture and to increase the quality of steam at the end section of turbine.

In the cross compounding of the gas turbine plant H.P. compressor is connected to L.P. turbine and L.P. compressor is connected to H.P. turbine

Advantages of multi-stage compressor over single stage compressor. -The fluid can be compressed to very high pressure. - The intercooler is more efficient than the cylinder wall cooling in a single stage compressor. -Pressure ratio per each stage is lowered and it reduces the leakage loss.

1 m of air at atmospheric condition weighs approximately 1.3 kg

A simple turbojet engine is basically Gas turbine engine equipped with a propulsive nozzle and diffuse

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Maximum work is done in compressing air when the compression is adiabatic