Chemical Engineering Basics Quiz 6

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) ?

Heating of ferromagnetic materials to a temperature above Curie temperature makes it __________?

Hooke?s law_________?

High speed steel tools retain their hardness upto a temperature of ___________ ?C?

In a neutral solution___________?

In a boundary layer developed along the flow, the pressure decreases in the downstream direction. The boundary layer thickness in this case will ________?

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 ?

In the diving apparatus, helium is used along with oxygen, because it is ______?

Hollow shafts can be made as strong as solid shafts by making the twisting moments of both the shafts same. Shafts made by ______ have residual stresses ?

In case of simple harmonic motion, displacement is proportional to the__________?

In the acid Bessemer process, the hot metal should have the following composition ?

If a nuclear reactor produces more fissile nuclear fuel than it consumes, then it is called a ______ reactor?

High endurance limit of carburised machine parts is because of the fact that carburisation ___________?

Heat transfer by _______ is almost absent in case of fluidised bed drying operation?

In a furnace with heating element temperature at 1700?C, the dominant mechanism of heat transfer will be___________?

In the Bayer?s process, bauxite is digested under pressure using _____?

If a solid is compressed adiabatically in its elastic range, its ______ remains constant ?

In the blast furnace, incorporation of water vapour in the blast gives the following effect ?

In _________ process, there is an increase in entropy with no degradation of energy ?

Hot extrusion of aluminium is done in the temperature range of _________ ?C ?

Identify the false statement?

In extrusion of metals, which of the following statement is true ?

If the head is doubled in & centrifugal pump, the power required will increase in the ratio of___________?

Hot dipping process is used for coating a low melting point metal (e.g. Pb, Sn, Zn) on iron, steel & copper having relatively higher melting points. Which of the following is not a hot dipping process ?

In practice, the compression ratio of compression-ignition (CI) engine ranges from ________?

In a totally irreversible isothermal expansion process for an ideal gas, ?E = 0, ?H = 0. Then ?Q and ?S will be________?

In a good rimming steel___________?

Heating the Hypo-eutectoid steels to 30?C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called_________?

Hot working of lead is carried out at _____?

In multipass welds, shot peening is done after each pass to___________?

In ?Imperial Smelting Process? for extraction of zinc, zinc vapour thus produced is quenched in the external condenser by the use of the following _________?

Identify the correct statement with reference to the extractive metallurgy of aluminium ?

In inventory control theory, the economic order quantity (EOQ) is the______?

In case of brasses, with decreasing zinc percentage and increasing copper percentage, its ______ increases ?

Hot & cold working of material causes its ________ deformation?

Hydro-cyclone is a______?

In connection with corrosion of metals, passivation is the process that___________?

If the demand for an item is trebled and the order cost is reduced to one third, then the economic order quantity__________?

In case of a, centrifugal pump, the ratio h1/h2 is termed as the ______ efficiency (where, h1 = actual measured head & h2 = head imparted to the fluid by impeller)?

In a forced draft cooling tower, water is cooled from 95 to 80?F by exposure to air with a wet bulb temperature of 70?F. In this case, the_________?

In chemical dehumidification of air_____?

Hydrogen in liquid steels is dissolved__________?

In a drilling process, the metal is removed by both shearing & extrusion. General purpose drills are made of__________?

High relative humidity decreases the evaporative process and as the temperature is increased, the relative humidity decreases. The comfort range for human body is the ambient temperature of 22 to 27?C with relative humidity ranging from ________ percent ?

In electrical resistance welding, distortion results from the use of improper_________?

If Reynolds number is greater than 1, then the_______?

Highest cutting speed is achieved by the ________ tool material ?

Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by__________?

In case of condensers & evaporators operating under given terminal conditions, LMTD (logarithmic mean temperature difference) for counter flow as compared to that for parallel flow is___________?

In condensers used in thermal power plants, steam is normally used in shell side and cooling water on the tube side, because of the reason that ?