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. The effect of friction on the flow of steam through a nozzle is to decrease the _______________ of steam?

A. Wetness
B. Mass flow rate
C. Both A & B
D. Neither A nor B
1 answer asked Nov 2, 2020 in General Knowledge by anonymous
_________________ is not a heat treatment process ?

A. Cyaniding
B. Parkerizing
C. Austempering
D. Martempering
1 answer asked Nov 2, 2020 in General Knowledge by anonymous
______________ is not used as the control rod material in a nuclear reactor ?

A. Cobalt
B. Hafnium
C. Cadmium
D. Boron
1 answer asked Nov 2, 2020 in General Knowledge by anonymous
Which of the following can be manufactured using powder metallurgy techniques ?

A. Brake linings
B. Bearings
C. Carbide tool tips
D. All A, B and C
1 answer asked Nov 2, 2020 in General Knowledge by anonymous
Pick out the wrong statement about nucleate boiling ?

A. Bubble generation is by expansion of entrapped gas/vapour at small cavities in the surface
B. Surface temperature is greater than the saturation temperature of the liquid
C. Heat transfer from the surface of the liquid is less than that in film boiling
D. The temperature is less than that of film boiling
1 answer asked Nov 2, 2020 in General Knowledge by anonymous
Latent heat of dry steam at atmospheric pressure is 539 Kcal/kg; which _____________ with increase in the pressure of steam?

A. Decreases
B. Increases
C. Remain same
D. May increase or decrease
1 answer asked Nov 2, 2020 in General Knowledge by anonymous
With increasing carbon percent in steel beyond 0.8%, its ultimate tensile strength (UTS) and _____________ is not affected ?

A. Impact strength
B. Percent elongation
C. Hardness
D. Both B & C
1 answer asked Nov 2, 2020 in General Knowledge by anonymous
The bank of tubes located at the back of the domestic refrigerators are the _______________ tubes?

A. Refrigerant cooling
B. Evaporator
C. Condenser
D. Throttling
1 answer asked Nov 2, 2020 in General Knowledge by anonymous
Electrometallurgy is not involved in the extraction of ___________________ from its ore?

A. Aluminium
B. Tin
C. Lead
D. Both B. & C.
1 answer asked Nov 2, 2020 in General Knowledge by anonymous
Screws are specified by their _____________ diameters?

A. Minor
B. Major
C. Pitch
D. None of these
1 answer asked Nov 2, 2020 in General Knowledge by anonymous
Cupola produces _________________ iron?

A. Pig
B. Cast
C. Wrought
D. Carbon free
1 answer asked Nov 2, 2020 in General Knowledge by anonymous
In a furnace with heating element temperature at 1700°C, the dominant mechanism of heat transfer will be__________________?

A. Conduction
B. Radiation
C. Natural convection
D. Forced convection
1 answer asked Nov 2, 2020 in General Knowledge by anonymous
Pick out the wrong statement about coating/electroplating of metals ?

A. Phosphate coating is used as an excellent base for paints & enamels
B. Phosphate coating is less corrosion resistant than chromate coating
C. The base metal to be electroplated is normally made the cathode of the electrolytic cell and
coating metal is made the anode
D. Calorising is the process of coating steel with chromium
1 answer asked Nov 2, 2020 in General Knowledge by anonymous
Nusselt number/Biot number varies___________________?

A. Inversely with thermal conductivity
B. Directly with heat transfer co-efficient
C. Directly with thermal conductivity
D. Inversely with the dimension of the solid
1 answer asked Nov 2, 2020 in General Knowledge by anonymous
Hooke’s law_______________________?

A. Applies to elastic deformation
B. Applies beyond limit of proportionality in stress-strain curve
C. States that stress is inversely proportional to strain upto elastic limit
D. None of these
1 answer asked Nov 2, 2020 in General Knowledge by anonymous
Increase in temperature, in general results in the____________________?

A. Decrease in the viscosities of both liquids & gases
B. Increase in the viscosities of both liquids & gases
C. Increase in the viscosity of liquids and decrease in that of gases
D. Decrease in the viscosity of liquids and increase in that of gases
1 answer asked Nov 2, 2020 in General Knowledge by anonymous
Which of the following fastening devices has its both ends threaded ?

A. Bolt
B. Stud
C. Set screw
D. Split nut
1 answer asked Nov 2, 2020 in General Knowledge by anonymous
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