Related Questions
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4
Baffles provided on the shell side of a shell and tube heat exchanger are meant for
A. Providing support for the tubes
B. Improving heat transfer
D. Preventing the fouling of tubes & stagnation of shell side fluid
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4
Dew point temperature always gives an indication of the __________ of the moist air.
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4
The thermodynamic law, = constant, is not followed by the
A. Free expansion of an ideal gas
B. Adiabatic expansion of steam in turbine
C. Adiabatic compression of air
D. Ideal compression of air
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4
The kinematic viscosity (in stoke) and the absolute/dynamic viscosity (in poise) are the same for __________ at room temperature.
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4
Which of the following metals reacts violently with water?
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4
Pick out the correct statement about the condensation.
A. Filmwise condensation gives a lower heat transfer rate than the dropwise condensation
B. Suitable coating or vapour additive is used to promote film wise condensation
C. If a condensing liquid does not wet the surface dropwise, even then condensation will take place on it
D. Reynolds number of condensing liquid is based on its mass flow rate
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4
In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is __________ °C.
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4
Air/fuel ratio on molar (volume) basis for combustion of methane with theoretical quantity of air with be
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4
Filler material used in welding should have __________ as compared to the parent metal to be welded.
A. Lower melting temperature
B. Same melting temperature
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4
Maraging steels derive their strength from the following mechanism:
A. A fine, highly dislocated and strong martensite
B. Fine dispersions of inter-metallic of Fe, Ni, Ti etc
C. Fine dispersions of alloy carbides in a ferrite matrix
D. Fine dispersions of C nucleated on dislocations in austenite
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4
A material is capable of resisting softening at high temperature, because of its property termed as
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4
Which one is neutral in character?
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4
Which of the following forces does not act on a fluid at rest?
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4
Work required for compression of a gas contained in a cylinder is 7000 kJ. During compression, heat interaction of 3000 kJ causes the surroundings to be heated. Internal energy change of the gas during the compression is __________ kJ.
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4
The passage between the nozzle and the __________ is called 'sprue' in case of injection moulding.
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4
The laminar boundary layer thickness in zero pressure gradient flow over a flat plate along the x-direction varies as x0.5 while the thickness of turbulent boundary layer varies as (where, x = distance from the leading edge)
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4
Difference at any instant between the value of the controlled variable and the set point is called the
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4
Spark plug is provided in a/an
A. Engine having carburettor
C. Compression ignition engine
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4
__________ of grey cast iron produces white cast iron.
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4
Cast iron contains __________ percent carbon.
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4
Capacity & power requirement for an air compressor working at high altitude compared to sealevel will be
D. Either more or less; depends on the climatic conditions
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4
Which of the following has the least value of ultimate tensile strength (UTS)?
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4
Which of the following material handling equipments is not suitable for moving materials in varying paths?
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4
Percentage of differential pressure lost in a Venturimeter with a tapering of 15° may be about
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4
Out of the following, maximum temperature drop for a given heat flow & for the same thickness will be in the case of
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4
Fatigue resistance of a material is measured by the
B. Ultimate tensile strength
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4
The wet bulb temperature is lower in dry air than in wet air at the same temperature. A dry bulb thermometer registers a higher temperature than a wet bulb thermometer except at __________ percent relative humidity.
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4
Brittleness induced due to the presence of sulphur in steel can be reduced by adding
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4
What is the value of entropy at 273°K?
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__________ of air does not increase with increase in temperature.