mechanical quiz 1

mechanical quiz 1

Hello guys, Here is a mechanical quiz 1 for you and also you can grade up your knowledge so let's start guys

1. A cycle consisting of one constant pressure, one constant volume and two isentropic processes is k

Carnot cycle
Stirling cycle
Otto cycle
Otto cycle


2. The efficiency and work ratio of a simple gas turbine cycle are

low
very low
high
very high


3. An adiabatic process is one in which

no heat enters or leaves the gas
the temperature of the gas changesthe change in internal energy is equal to the mechanical workdon
the change in internal energy is equal to the mechanical workdone
all of the above


4. Which of the following has the minimum atomic mass?

Oxygen
Sulphur
Nitrogen
Carbon


5. Workdone in a free expansion process

zero
minimum
maximum
positive


6. The compression ratio for petrol engines

3 to 6
5 to 8
15 to 20
20 to 30


7. Specify the sequence correctly

Grain growth, recrystallisation, stress relief
Stress relief, grain growth, recrystallisation
Stress relief, recrystallisation, grain growth
Grain growth, stress relief, recrystallisation


8. Which of the following material has maximum ductility?

Mild steel
Copper
Nickel
Aluminium


9. An eutectoid steel consists of

wholly pearlite
wholly austenite
pearlite and ferrite
pearlite and cementite


10. Shock resisting steels should have

low wear resistance
low hardness
low tensile strength
toughness