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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. |
Q1 ⇒ First empirical temperature scale conceived is the __________ temperature scale. Farenhite [other wrong options] [Discuss in forum] ![]() ![]() Absolute Reaumer Celcius |
Q2 ⇒ Pick out the wrong statement. In a thin spherical shell under internal pressure, hoop stress is equal to the half of axial stress. [other wrong options] [Discuss in forum] ![]() ![]() Thermoplastic material does not follow Hooke's law of elasticity. Components under longitudinal compression is called 'struts' and the load under which strut fails is called crippling or buckling load. At low temperatures (sub-zero) in pressure vessels, the ductility of metal diminishes and brittle fracture occurs while at high temperature in pressure vessels, embrittlement of material may take place. |
Q3 ⇒ Phosphorous is added to copper melt to remove hydrogen. [other wrong options] [Discuss in forum] ![]() ![]() deoxidise the metal. improve fluidity. reduce shrinkage. |
Q4 ⇒ Diamagnetic materials are magnetised in direction opposite to the magnetic field. [other wrong options] [Discuss in forum] ![]() ![]() are magnetised by eddy currents only. are non-magnetic and can not be magnetised. can be magnetised in one direction only. |
Q5 ⇒ Often earing defects are found during deep drawing operation, because the starting sheet has planer anisotropy due to its texture. [other wrong options] [Discuss in forum] ![]() ![]() surface finish of the sheet is poor. sheet material has been given substantial spring back. starting sheet has normal anitropy due to its texture. |
Q6 ⇒ Compressed dry air is used as the cutting fluid, while machining cast iron [other wrong options] [Discuss in forum] ![]() ![]() steel aluminium none of these |
Q7 ⇒ Joining of thin foils is preferred to be done by microwaves [other wrong options] [Discuss in forum] ![]() ![]() gamma rays X-rays gas welding |
Q8 ⇒ Needles are produced by swaging [other wrong options] [Discuss in forum] ![]() ![]() forging extrusion machining |
Q9 ⇒ Electric arc furnace is employed mainly for the production of __________ steel. alloy [other wrong options] [Discuss in forum] ![]() ![]() high carbon mild plain carbon |
Q10 ⇒ Which set of materials is used as a moderator in nuclear reactor ? Heavy water & berrelium. [other wrong options] [Discuss in forum] ![]() ![]() Zircalloy & berrylium. Zircalloy & heavy water. Zirconium & berrylium. |
Q11 ⇒ Cold working of a material results in increase in hardness, which is termed as the __________ hardening. work [other wrong options] [Discuss in forum] ![]() ![]() cold age induction |
Q12 ⇒ Toughness of a material is measured by the universal testing machine. [other wrong options] [Discuss in forum] ![]() ![]() Vicker's hardness test. scratch test. notched bar test. |
Q13 ⇒ Even though heat transfer co-efficients in boiling liquids is large, use of fins is advantageous, when the entire surface is exposed to __________ boiling. film [other wrong options] [Discuss in forum] ![]() ![]() nucleate transition all modes of |
Q14 ⇒ An ideal material for making cooking vessels should have both (b) and (c). [other wrong options] [Discuss in forum] ![]() ![]() high heat capacity. low heat capacity. high thermal conductivity. |
Q15 ⇒ Pick the odd man out of the following. Calorising [other wrong options] [Discuss in forum] ![]() ![]() Pack carburising Nitriding Cyaniding |
Q16 ⇒ Pick out the wrong statement. Stress corrosion occurs due to the combined action of corrosive environment and the compressive stress. [other wrong options] [Discuss in forum] ![]() ![]() Erosion corrosion which is identified by surface grooves, occurs due to the combined action of corrosive environment and mechanical abrasion. Stainless steel is prone to stress corrosion in solution containing chloride ion. In case of stress corrosion, the direction of crack propagation is perpendicular to the applied tensile stress. |
Q17 ⇒ A pipeline buried in soil is commonly protected from corrosion by cathodic protection. [other wrong options] [Discuss in forum] ![]() ![]() anodic protection. using inhibitors. using a special alloy resistant to corrosion. |
Q18 ⇒ The most important requirement for aluminium industry is the availability of cheap electrical power [other wrong options] [Discuss in forum] ![]() ![]() ore labour & abundant water |
Q19 ⇒ Thermoplastics are never moulded using compression moulding [other wrong options] [Discuss in forum] ![]() ![]() injection moulding blow moulding extrusion |
Q20 ⇒ About __________ ton of coke is required in a cupola to produce one ton of casting. 0.3 [other wrong options] [Discuss in forum] ![]() ![]() 0.03 0.8 1.5 |
Or |