Q.1
Pick out the correct statement.
Q.2
Yield strength of a polycrystalline metal with an average grain size, d, is proportional to
Q.3
A material expanding freely due to heating will develop __________ stress.
Q.4
Joining of thin foils is preferred to be done by
Q.5
Which of the following metals occurs in nature in their free metallic state?
Q.6
Steels with high carbon equivalent have poor weldability, because in these steels during welding
Q.7
The refrigerant freon-12 is chemically
Q.8
Welded joint is superior to revetted joint in respect of ease of fabrication, weight and strength. Which of the following joints is the most suitable for pipes carrying fluids under high pressure and temperature?
Q.9
Commonly employed coolant for high pressure turbogenerator is
Q.10
The surface tension of a liquid, at critical temperature is
Q.11
Identify the false statement
Q.12
Pick out the correct statement.
Q.13
Pick out the correct statement.
Q.14
Out of the following, maximum temperature drop for a given heat flow & for the same thickness will be in the case of
Q.15
Which of the following has the least value of ultimate tensile strength (UTS)?
Q.16
In a good rimming steel
Q.17
Hydrocyclone is a
Q.18
Consider the equilibrium A(g) + B(g) = AB(g). When the partial pressure of A is 10⁻² atm, the partial pressure of B is 10⁻³ atm and the partial pressure of AB is 1 atm, the equilibrium constant 'K' is
Q.19
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.
Q.20
Out of the following, the best material capable of withstanding shock & vibration without the danger of cracking is
Q.21
Which of the following materials does not form adherent oxide film on surface?
Q.22
Broaching tools are usually made of
Q.23
The lightest non-inflammable gas is
Q.24
Fatigue life is expected to increase by
Q.25
Hydrogen can be
Q.26
In case of water (Prandtl number ≈ 6) flowing over a flat plate heated over the entire length, the thermal boundary layer thickness as compared to hydrodynamic boundary layer thickness is
Q.27
In inventory control theory, the economic order quantity (EOQ) is the
Q.28
Out of the following, the __________ pipe has the least corrosion resistance.
Q.29
Electrical conductivities of semi-conductors are of the order of __________ ohm/cm.
Q.30
Which of the following is not categorised as the ore agglomeration process?
Q.31
Out of the following, the best material capable of withstanding shock & vibration without the danger of cracking is
Q.32
Which of the following varies as the square root of oil pressure during atomisation of fuel oil through a pressure jet burner?
Q.33
Hooke's law
Q.34
__________ is a special constituent of chlorophyll without which photosynthesis is not possible.
Q.35
Heat treatment of steel is done mainly to change its
Q.36
Fire on fuel oil lines can be extinguished by
Q.37
The ultimate strength in tension for steel is __________ times the ultimate strength in shear.
Q.38
Tesla metre per ampere (T. m/A) is the unit for the measurement of
Q.39
Stresses encountered in the metal forming processes are less than the __________ of the material.
Q.40
Reduction in the grain size reduces the __________ of the material.
Q.41
Gross & Net calorific values will be the same for
Q.42
The activity co-efficient of the solute in a dilute solution
Q.43
Satellites burn off during re-entry to earth's atmosphere, because of the
Q.44
Which of the following is used to produce draught in the locomotive boilers ?
Q.45
Air intake for an air compressor should be preferably taken from
Q.46
Boiler tube size is specified by its thickness and __________ diameter.
Q.47
__________ property of steel increases by addition of large amount of silicon in it.
Q.48
LASER
Q.49
Sheardising process is used for
Q.50
Malleabilisation heat treatment is performed on
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