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

Consider the following statements:
1.The only practical way of improving efficiency of Otto cycle is to increase the compression ratio of an internal combustion engine.
2.Ericsson cycle needs heat transfer in all the processes.
3.Ericsson and Stirling cycles employ regenerative heat exchangers for reversible heat transfer.
4.Atkinson cycle has a greater specific work than a comparable Otto cycle engine. 
Which of the above statements are correct? 

For a multistage reciprocating compressor, which of the following statements are correct?
1.It decreases volumetric efficiency
2.The work of compression is reduced
3.The high pressure cylinder is smaller in size  

Consider the following statements
1.Free expansion of a gas
2.Slow heating of oil from a constant temperature source
3.Evaporation of water at its saturation temperature by a source at the same temperature
4.Isentropic compression of an ideal gas 
Which of these processes are irreversible? 

There is a uniform distributed source of heat present in a plane wall whose one side ( x=0) is insulated and other side (x=L) is exposed to ambient temperature (T_∞), with heat transfer coefficient (h). Assuming constant thermal conductivity (k), steady state and one dimensional conduction, the temperature of the wall is maximum at x equal to

An insulating material with a thermal conductivity, k=0.12 W/mK is used for a pipe carrying steam. The local coefficient of heat transfer (h) to the surroudings is 4 W/m²K. In order to provide effective insulation, the minimum outer diameter of the pipe should be 

A plane wall is 20 cm thick with an area perpendicular to heat flow of 1m² and has a thermal conductivity of 0.5 W/mK. A temperature difference 100°C is imposed across it. The rate of heat flow is

The laminar flow is characterized by Reynolds number which is

Consider the following statements:An increase in pin fin effectiveness is caused by high value of
1.Convective coefficient
2.Thermal conductivity
3.Sectional area
4.Circumference 
Which of the above statements are correct?

In a laminar developing flow through a pipe with constant wall
temperature, the magnitude of the pipe wall inner surface convective heat transfer coefficient shall be maximum at the:

Oxides of nitrogen in petrol engine exhaust can be reduced by the following methods:
1.Use of 5% lean mixture
2.Advancing the spark timing
3.Recirculating a fraction of exhaust gas
4.Using an oxidation catalyst in the exhaust manifold 
Which of the above statements is/are correct? 

Consider the following statements with regard to heat transfer:
1.The temperature variation in lumped heat capacity analysis is exponential with time.
2.In situations involving simultaneous heat and mass transfer, the ratio of convective heat transfer to convective mass transfer varies with Lewis number, Le, as (Le)^1/3. 
Which of the above statements are correct? 

For a fluid with Prandtl number Pr>1, momentum boundary layer thickness

For the same type of shapes, the value of Radiation Shape Factor will be higher when the surfaces are

In a pipe, laminar flow in fully developed region with constant heat flux from pipe wall, bulk mean temperature of fluid

Which of the following statements is correct for steam boiler?

In a wall of constant thermal conductivity, the temperature profile for heat conduction in the presence of a heat source inside the wall is

Determine the heat transfer through a plane of length 4m, height 3m and thickness 0.2 m. The temperature of inner and outer surfaces is 150°C and 90°C respectively. Thermal conductivity of the wall is 0.5 W/mK.

Along the ‘triple line’ in a p-v diagram showing all three phases of water, which one of the following statements is correct?

In a cyclic process, the heat transfer are +30J, -50J, -10J and +60J. The net work for the cyclic process is

A researcher claims that he has developed an engine, which while working between source and sink temperatures of 377°C and 27°C rejects only 50% of absorbed heat. What will his engine be?

Yojna a weekly journal

Kurukshetra a journal on rural development is published by

Devaluation of a currency means

In India rural incomes are generally lower than the urban incomes, which of the following reasons account for this
            1. a large number of farmers are illiterate and know little about scientific agriculture
            2. prices of primary products are lower than those of manufactured products
            3. Investments in agriculture has been low when compared to investment in industry

Temperature can be expressed as derived quantity in terms of

Which of the following is not a synthetic fibre:

Which of the following contain enzymes for cellular respiration ?

Phangnon Konyak, who was seen in the news, is a Member of Parliament from which state/UT ?

Which river serves as the predominant border between the United States and Mexico ?

Mhadei Wildlife Sanctuary is located in which state/UT ?

According to the passage, what is the main purpose of data protection laws ?

‘Gram’ is relatd to ‘Mass’ in the same way as ‘Centimetre’ is related to

'Mustard' is related to 'Seed' in the same way as 'Carrot' is related to

Which of the following pairs of words have the same relationship as Fan : Heat?

'Radish' is related to 'Root', in the same way as 'Brinjal' is related to

The cash difference between the selling prices of an article at a profit of 4% and 6% is Rs. 3. The ratio of the two selling prices is:__________ ?

Which of the following numbers is irrational ?

356 x 936 – 356 x 836 = ?

Arrange in descending order: 5/8, 7/10, 3/4

What is (3^{^}{4} times 9^{^}{2}) ?

Read sentence to find out whether there is any grammatical error in it. The sentences are In three separate parts and each one is labelled (a), (b), (c) and (d). In that case, letter (d) will signify a ‘No error’ response.

Read sentence to find out whether there is any grammatical error in it. The sentences are In three separate parts and each one is labelled (a), (b), (c) and (d). In that case, letter (d) will signify a ‘No error’ response.

Read sentence to find out whether there is any grammatical error in it. The sentences are In three separate parts and each one is labelled (a), (b), (c) and (d). In that case, letter (d) will signify a ‘No error’ response.

Read sentence to find out whether there is any grammatical error in it. The sentences are In three separate parts and each one is labelled (a), (b), (c) and (d). In that case, letter (d) will signify a ‘No error’ response.

Read sentence to find out whether there is any grammatical error in it. The sentences are In three separate parts and each one is labelled (a), (b), (c) and (d). In that case, letter (d) will signify a ‘No error’ response.

Read sentence to find out whether there is any grammatical error in it. The sentences are In three separate parts and each one is labelled (a), (b), (c) and (d). In that case, letter (d) will signify a ‘No error’ response.

Read sentence to find out whether there is any grammatical error in it. The sentences are In three separate parts and each one is labelled (a), (b), (c) and (d). In that case, letter (d) will signify a ‘No error’ response.

Read sentence to find out whether there is any grammatical error in it. The sentences are In three separate parts and each one is labelled (a), (b), (c) and (d). In that case, letter (d) will signify a ‘No error’ response.

Read sentence to find out whether there is any grammatical error in it. The sentences are In three separate parts and each one is labelled (a), (b), (c) and (d). In that case, letter (d) will signify a ‘No error’ response.

Read sentence to find out whether there is any grammatical error in it. The sentences are In three separate parts and each one is labelled (a), (b), (c) and (d). In that case, letter (d) will signify a ‘No error’ response.