Mechanical Technical Questions And Answers Pdf

1) Cavitation occurs due to

A) High velocity B) Low Barometric Pressure C) High Pressure D) Low pressure E) None of these

2) The velocity of fluid particle at the centre of the pipe section is

A) Maximum B) Minimum C) Average D) R.M.S E) None of these

3) During throttling process

A) Internal energy does not change B) Pressure does not change C) Entropy does not change D) Enthalpy does not change E) None of these

4) In an automobile gear box is fitted between

A) Engine and clutch B) Clutch and Differential C) Differential and heels D) Clutch and Wheels E) None of these

5) During an adiabatic process the change in entropy is

A) + ve B) –ve C) Zero D) +ve or –ve E) None of these

6) Volume of air at 27°C is 2 cu-m. What will de the volume at 372°C

A) 2 cu-m B) 3 cu-m C) 6 cu-m D) 8 cu-m E) None of these

Handbook Of Heat Exchangers