Mechanical Engineering One-liner
Internal energy of a system increases when heat is added at constant volume —
No heat transfer
Steam turbines are preferred over gas turbines for —
Constant load conditions
The ratio of specific heats (γ = Cp/Cv) for air is nearly —
1.4
Rankine cycle efficiency increases when —
Superheating is done
Hardness of a material is its ability to —
Resist wear and abrasion
When two gears are meshed, the smaller is called —
Pinion
Otto cycle is used in —
Gasoline engines
Materials are tempered after hardening to —
Reduce brittleness
The efficiency of a Carnot engine depends on —
Temperature difference
The Reynolds number is used to predict —
Flow regime
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