List of top Mechanical Engineering Questions

In a psychrometric process, the sensible heat added is 30 kJ/s and the latent heat added is 20 kJ/s. The sensible heat factor for the process will be:
Vapour Absorption Refrigeration System, normally uses refrigerant.
A machine is used as both Refrigeration Unit and Heat pump. For the same limits of temperatures, if the ratio of Coefficient of Performance of Heat Pump to Coefficient of Performance of Refrigeration Unit is 1.2, then the Coefficient of Performance of Refrigeration Unit is:
Which of the following component is NOT used in vapour compression refrigeration system?
Which of the following is NOT a type of surface steam condenser:
In jet type steam condensers; .
The process of draining steam from the turbine, at certain points during its expansion and using this steam for heating the feed water is known as .
For Parson’s reaction turbine, degree of reaction is .
Which of the following steam turbine is NOT compounded?
For a steam nozzle, if $p_1$ = Inlet pressure; $p_2$ = Exit Pressure and n = Index of isentropic expansion, the mass flow rate per unit area is maximum, when $\frac{p_2}{p_1}$ is equal to:
The device used to protect the boiler when the water level falls below a minimum level, is called:
Which of the following boiler is a horizontal double fire tube boiler?
In Mollier chart, an isentropic process is represented by a line.
The process of superheating of steam is always carried at constant .
A hydraulic actuator works on which of the following law?
In a single acting reciprocating pump (hydraulic), work saved in friction due to fitting of air vessel is:
Which of the following hydraulic turbine is known as mixed flow turbine?
In order to have maximum power from a Pelton turbine, the bucket speed must be
A jet of water coming out of a nozzle with a velocity of 20 m/s strikes a hinged plate at the centre. Nozzle area is $2 \times 10^{-3}$ m$^2$; density of water is 1000 kg/m$^3$. If the angle of the swing of the plate from the vertical is $30^\circ$, then the weight of the plate is:
In flow through pipes, according to Darcy-Weisbach formula the loss of head due to friction is proportional to , Where, V = Mean velocity of flow.
If the flow of an incompressible fluid is irrotational as well as steady, then it is known as:
If the surface tension at the soap bubble-air interface is 0.09 N/m; then what is the internal pressure in a soap bubble of 24 mm diameter?
Units of Kinematic Viscosity is:
Which of the following Jet Propulsion System does not contain compressor and turbine?
The air standard efficiency of closed gas turbine cycle is given by: Where r = Pressure ratio for compression and turbine; and $\gamma$ = Isentropic index of air.