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Chemical engineering basics
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q21 ⇒ Gratings is associated with the measurement of linear displacement. [other wrong options] [Discuss in forum] concavity/convexity. surface texture. flatness. |
Q22 ⇒ A controller action in which there is a con-tinous relation between the values of controlled variable and the rate of change of conrolled output signal is called the __________ action. integral [other wrong options] [Discuss in forum] proportional derivative none of these |
Q23 ⇒ Melting point & boiling points of liquid oxygen are respectively - 218.8°C & - 183°C, while the same for liquid nitrogen is - 210°C & - 195.8°C respectively. The difference in melting points of liquid oxygen & liquid nitrogen is not equal to 8.8 °F [other wrong options] [Discuss in forum] °C °K °R |
Q24 ⇒ Which of the following heat treatment processes is used for softening the hardened material ? Tempering [other wrong options] [Discuss in forum] Normalising Annealing None of these |
Q25 ⇒ __________ of hard alloy and tool steel is done to make it easily machinable. Tempering [other wrong options] [Discuss in forum] Case carburising Normalising Annealing |
Q26 ⇒ Commonly employed coolant for high pressure turbogenerator is hydrogen [other wrong options] [Discuss in forum] air carbon dioxide water |
Q27 ⇒ A gas which is collected over water becomes moistened due to water vapor, exerts its own partial pressure at the gas temperature, which is termed as its aqueous tension. [other wrong options] [Discuss in forum] saturated humidity. vapor pressure. absolute humidity. |
Q28 ⇒ The swift cup test evaluates the following property of a sheet metal. Drawability [other wrong options] [Discuss in forum] Stretchability Bendability None of these |
Q29 ⇒ 1% concentration of water vapor in air is equivalent to __________ ppm (parts per million). 10000 [other wrong options] [Discuss in forum] 1000 100 10 |
Q30 ⇒ The maximum percentage of chromium that can be added to steel is about 18 [other wrong options] [Discuss in forum] 12 24 30 |
Q31 ⇒ A thin, flat & square plate measuring 2 m x 2 m is freely hanging in ambient air at 25°C. It is exposed to the solar radiation falling on one side of the plate at the rate of 500 W/m2 . The plate temperature will remain constant at 30°C, if the convective heat transfer co-efficient is __________ W/m2 °C. 100 [other wrong options] [Discuss in forum] 50 150 200 |
Q32 ⇒ Normalising of an object does not improve ductility. [other wrong options] [Discuss in forum] refine coarse grain structure obtained during hot working. improve yield strength. improve machanical properties. |
Q33 ⇒ An approximately __________ process exemplifies the flow of a gas through a very long pipe of uniform cross-section. isothermal [other wrong options] [Discuss in forum] adiabatic isentropic isochoric |
Q34 ⇒ Eutectic reaction for iron-carbon system occurs at a temperature of __________ °C. 723 [other wrong options] [Discuss in forum] 959 1147 1493 |
Q35 ⇒ Though tin occurs lower than iron in the electrochemical series, yet it is coated on steel for corrosion protection, because of its resistance to vegetable acids as the tin plate are commercially used in 'canning' industry. [other wrong options] [Discuss in forum] lower cost. abundant availability. none of these. |
Q36 ⇒ Upto the critical radius of insulation, added insulation, will decrease heat loss and will have no effect beyond that. [other wrong options] [Discuss in forum] increase the heat loss. decrease heat flux. reduce convection heat loss compared to conduction heat less. |
Q37 ⇒ No cutting fluid is normally used, while machining cast iron [other wrong options] [Discuss in forum] aluminium mild steel stainless steel |
Q38 ⇒ Diamond does not conduct electricity, because no free electrons are present. [other wrong options] [Discuss in forum] its structure is very compact. it is of crystalline nature. there are only carbon atoms present. |
Q39 ⇒ The main constituent of bones is Ca3(PO4)2 [other wrong options] [Discuss in forum] CaF2 CaCO3 CaCl2 |
Q40 ⇒ Which of the following will resist maxi-mum shock & vibration without cracking? Malleable iron [other wrong options] [Discuss in forum] Grey cast iron White cast iron Graphite |
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