Q.1
The conventional mechnical transducer, which converts pressure signal to displacement signal is
Q.2
Heat release during phase change is observed in case of a/an
Q.3
For dynamic strain measurement, the wheatstone bridge used is of __________ type.
Q.4
Galena is an ore of
Q.5
Galvanic corrosion
Q.6
Superheating of steam is done at constant
Q.7
Pick out the wrong statement.
Q.8
Coating provided on the electrodes used in the arc welding is not expected to
Q.9
Which of the following hardness tests does not measure the indentation hardness of metals and alloys ?
Q.10
In a furnace with heating element temperature at 1700°C, the dominant machanism of heat transfer will be
Q.11
Annealing of cast iron
Q.12
Specific gravity of hot metal (pig iron) is __________ times that of the blast furnace slag.
Q.13
The pH value is the measure of hydrogen ion concentration in a solution. The term pH stands for the __________ in the solution.
Q.14
Which of the following is the most suitable abrasive for grinding high tensile strength materials?
Q.15
Moist air is cooled along the line of constant __________ , when it is passed over a cold & dry cooling coil, such that no condensation occurs.
Q.16
Moist air is cooled along the line of constant __________ , when it is passed over a cold & dry cooling coil, such that no condensation occurs?
Q.17
A metal having a Poisson's ratio = 0.3 is elastically deformed under uniaxial tension. If the longitudinal strain = 0.8, then the magnitude of thickness strain is
Q.18
Photographic plates are coated with
Q.19
Catalyst used in the 'catalytic converter' employed in automobile exhaust line for complete combustion/oxidation of carbon monoxide, nitrogen oxides and hydrocarbons is
Q.20
Ammonia leakage in the refrigeration system is detected by
Q.21
Knocking tendency in a petrol engine decreases with increasing
Q.22
Volumetric composition of flue gas analysed with the Orsat apparatus is : CO₂ = 12%, O₂ = 8%, CO = nil, N₂ = 80%. This flue gas composition indicates that
Q.23
Age hardening is connected with
Q.24
Gas carrying pipelines are best joined by
Q.25
Out of the following, the rays having the lowest wavelength is the
Q.26
Midrex process of sponge iron production uses reformed natural gas as the reducing agent, which uses iron ore in the form of
Q.27
A fine grained grinding wheel should not be used for grinding __________ materials.
Q.28
Which of the following is not an ore of aluminium?
Q.29
Which of the following is not an ore of aluminium?
Q.30
Which of the following is the most suitable for removing fine particles (< 1 micron diameter) from air below its dew point?
Q.31
Volute casing of a centrifugal pump does not facilitate
Q.32
The main charge in blast furnace is usually
Q.33
In Newton's law of viscosity, which states that the shear stress is proportional to the __________ Co-efficient of viscosity is called dynamic or absolute viscosity(where, V = velocity, Vg = velocity gradient ).
Q.34
A metalloid possesses the characteristics of both the metals and non-metals. Which of the following is not a metalloid?
Q.35
Hypo (sodium thiosulphate) because of its complex forming behaviour is used in photography to remove undecomposed silver bromide as a soluble complex for __________ of the picture.
Q.36
Which of the following gases cause global warming?
Q.37
Principal alloying element in Elinvar (used for making hair springs for watches) is
Q.38
Matte smelting is used in the extraction of
Q.39
Which of the following material handling equipments is not suitable for moving materials in varying paths?
Q.40
Earing is a defect found in steels after the following metal working operation (s).
Q.41
Function of gear box is to
Q.42
Function of fusible plug in a boiler is to
Q.43
Co-efficient of performance of a Carnot cycle refrigerator operating between - 23°C and + 27°C is
Q.44
Minimum diameter of the tube used for making water manometer should be __________ mm to avoid a correction for the effect of capillarity.
Q.45
Steel balls are manufactured by cold heading. After cold forming, they are subjected to
Q.46
The only suitable method for hardening the low carbon steel is case hardening. Which of the following is a case hardening process?
Q.47
The life of a ball bearing is inversely proportional to
Q.48
Material having negative co-efficient of linear expansion is
Q.49
Presence of sulphur in steel reduces the
Q.50
For the Stoke's law to be valid in the case of a falling sphere in a fluid, the
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