Category: Mechanical Engineering

The passage of uniformly varying cross-section in which the kinetic energy of steam increases at the expense of its pressure is called as?

A. steam turbine B. steam nozzle C. steam area D. all of the above Right Answer: B. steam nozzle

The quality of vapour at the exit of nozzle ___________ due to nozzle friction.

A. increases B. decreases C. does not change D. unpredictable Right Answer: A. increases

Which of the following is NOT a type of positive displacement pumps?

A. Reciprocating pump B. Rotary displacement pump C. Centrifugal pump D. None of the above Right Answer: C. Centrifugal pump

Rotary displacement pumps are suitable for handling?

A. oils B. gritty liquids C. both oils as well as gritty liquids D. None of the above Right Answer: A. oils

The function of _________ is to convert high kinetic energy of gases into pressure energy.

A. impeller B. diffuser C. casing D. None of the above Right Answer: B. diffuser

Which component of fluid velocity is responsible for transmission of power through rotodynamic machine?

A. Radial B. Axial C. Tangential D. None of the above Right Answer: D. Tangential

If (Vw1 u1 – Vw2 u2), then machine is called as?

A. compressor B. turbine C. pump D. all of the above Right Answer: B. turbine

What is the head of water available at turbine inlet in hydro-electric power plant called?

A. head race B. tail race C. gross head D. net head Right Answer: D. net head

What is runaway speed of the runner of Pelton wheel?

A. maximum unsafe speed of the runner due to sudden increase in load on turbine B. minimum safe speed of the runner due to sudden increase in load on turbine C. maximum …

The gates of aerofoil section in between the outer and inner ring of guide wheel are called as?

A. guide gates B. guide vanes C. scrolling gates D. scrolling vanes Right Answer: B. guide vanes