In a differential manometer a head of 0.6m of fluid A in limb 1 is found to balance a head of 0.3m of fluid B in limb 2. The ratio of specific gravities of A to B is

At x = 0, the function f (x) = |x| will be

The center of pressure of a plane submerged surface

A piece of metal of specific gravity 7 floats in mercury of specific gravity 13.6, what fraction of its volume is under mercury?

A right circular cylinder, open at the top, is filled with a liquid of specific gravity 1.2, and rotated about its vertical axis at such a speed that half of the liquid spills out. The pressure at the center of the bottom is

Consider the following statements about velocity potential:
1.Velocity potential is a vector function similar to stream function
2.It is a fully three dimensional function and not limited to two
coordinates
3.Velocity potential does not exist at stagnation points
4.Velocity potential exists only if the flow is irrotational 
Which of the above statements are correct? 

Principle mechanism of material removal in ECM?

In flow through a pipe, the transition from laminar to turbulent flow does not depend on

A 0.20m diameter pipe 20m long transports oil at a flow rate of0.01m³/s. Calculate power required to maintain flow if dynamic viscosity and density of oil is 0.08 Pas and 900 kg/m³ respectively

Pressure loss for laminar flow through pipeline is dependent

Fanno line is a flow in a constant area duct 

In an adiabatic flow with friction through a constant area duct, the following phenomenon are predicted:
1.The flow downstream tends to be sonic irrespective of the Mach-number upstream
2.In the case of initially supersonic flow, any increase in duct length beyond choked flow would make the exit flow subsonic
3.In the case of initially subsonic flow, any increase in duct length will not change sonic flow at the exit
4.The optimum pipe length for sonic outlet in supersonic flow is considerably longer than that of subsonic flow for the same flow rate 
Which of these are correct? 

In a reciprocating pump, air vessels are used to

Consider the following statements pertaining to centrifugal pumps:
1.The inlet to the impeller of a centrifugal pump is always axial, while the outlet may be radial or inclined.
2.The impeller may be shrouded on both sides with an eye at the centre and vanes curved backwards.
3.Impeller of double entry type has a balanced radial thrust.
4.Un-shrouded and part shrouded impeller are used only where high efficiency is unimportant. 
Which of these statements are correct? 

A centrifugal pump is fully primed, but on starting it fails to deliver fluid. Thr probable reasons are listed below:
1.Leaky foot valve or suction line
2.Suction head is very slow
3.Insufficient motor speed
4.Damaged or closed delivery valve 
Which of these reasons are correct? 

A centrifugal pump is to discharge 0.118 m³/s at speed of 1450 rpm against a head of 25m. The impeller diameter is 25cm, its width at outlet is 5cm and manometric efficiency is 75%. The vane angle at outer periphery of impeller is

A turbine is working under a head of 200m. The power developed by the turbine is 100kW and discharge through the turbine is 0.125 m³/s. In such case, the ratio of unit power to unit discharge for the turbine will be

Two geometrical similar pumps are running at 1000 rpm speed (both). If one pump has impeller diameter of 0.3m and discharges 20Ips against 20m head, and the other pump gives half of this discharge rate; calculate head and diameter of second pump

Frictional losses in the nozzle

In a nozzle designed for maximum discharge conditions, the flow velocity in the convergent section of the nozzle is

In the centrifugal compressor, the work input is equal to the sum of

For a centrifugal compressor with radial vanes, slip factor is the ratio of

The specific speed of a centrifugal compressor is generally

In a centrifugal compressor, the highest Mach number leading to shock wave in the fluid flow occurs at

The rating of the fuse wire is always expressed in

In an axial flow compressor, the ratio of pressure rise in the rotor blades to the pressure rise in the compressor in one stage is known as

CNC machine interpolator controls

If a row interchanged in the matrix, then the  determinant of matrix is

Water is coming out from a tap and falls vertically downwards. At the tap opening, the stream diameter is 20 mm with uniform velocity of 2 m/s. Assuming steady inviscid flow, constant pressure atmosphere everywhere, and neglecting curvature and surface tension effects, the diameter of the stream 0.5 m below the tap opening is nearly
 

A body of mass 20kg falls freely in vacuum. It has fallen through a vertical distance of 50m. The gravitational acceleration may be assumed as 10m/s². What is the thermodynamic work done by the body?

A closed gaseous system undergoes a reversible constant pressure process at 2bar in which 100 kJ of heat is rejected and the volume changes from 0.2m³ to 0.1m³. The change in the internal energy of the system is

A Carnot engines receives 100kJ of heat at 600K. Heat is rejected at 300K. The displacement volume is 0.2 m³. The mean effective pressure is

The ratio of static enthalpy rise in the rotor to the static enthalpy rise in the stage of an axial flow compressor is defined as:

The eigen values of a symmetric matrix are all

During a thermodynamic process, 100kJ of heat is transferred from a reservoir at 800K to a sink at 400K. The ambient temperature is 300K. the loss of available energy is

The vapor pressure of a liquid at any arbitrary temperature can be estimated approximately with the help of

In order to determine the quality of wet steam by a separating and throttling calorimeter, the steam should be first separated and then throttled such that the final state is

A rotor weighing 2 kN is supported on bearings A and B which are 1 m apart. The centre of mass of the rotor is at a distance 0.4 m from bearing A. It is observed that there is an unbalanced couple of magnitude 300 N-m which *leaves the shaft balanced statically. The dynamic reactions at the supports will be

A cam is a mechanical member used to impart a desired motion to a follower by direct contact. Which one of the under-listed follower motion types will produce the least jerk to the system?

The tendency of detonation is high in engines of larger cylinder diameter because of

An open cycle pressure gas turbine uses a fuel of calorific value 40,000 kJ/kg with airfuel ratio of 80 : 1 and develops a net output of 80kJ/kg of air. The thermal efficiency of the cycle is

Consider the following statements regarding cycles:
1.Stirling cycle consists of two isothermal and two adiabatic processes.
2.In vapor compression cycle, the refrigerant is in form of dry saturated vapor before entering compressor.
3.Diesel cycle consists of one constant pressure; one constant volume and two isentropic processes 
Which of the above statements are correct? 

The efficiency of vapor power Rankine cycle can be increased by
1 .Increasing the temperature of the working fluid at which heat is added
2.Increasing the pressure of the working fluid at which heat is added
3.Decreasing the temperature of the working fluid at which heat is rejected 
Which of the above statements are correct? 

The velocity of a gas flowing through a duct is 300 m/s; its temperature is 127°C; Gas constant R = 0.25 kJ/kg K, the ratio of specific heat is C_p/C_V = 𝛾 = 1.6. What is the value of Mach number?

When a system is taken from state ‘x’ to state ‘y’, 30kJ of heat flows into the system and the system does 10kJ of work. When the system is returned from ‘y’ to ‘x’ along another path, work done on the system is 8kJ. What is the amount of heat liberated or absorbed?

The values of heat transfer and work transfer for the processes of a thermodynamic cycle are given below:
Process                         Heat transfer                          Worktransfer
                                                (kJ)                                      (kJ) 
1                                        300                                          300
2                                         0                                             250
3                                      -100                                           -100
4                                       0                                               -250
The thermal efficiency of the cycle and the work ratio will be respectively