Chemical Engineering Objective Questions Quiz - Set 13 Chemical Engg. Quiz Quiz Questions - Set 13 01. In hot working, dynamic recovery occurs in (A) Metals of low stacking fault energy (B) Metals of high stacking fault energy e.g. α-iron (C) Single crystal of Ni-based superalloys (D) None of these 02. In an isochoric process, (A) There is no transfer of mass and energy (B) Free expansion of an ideal gas occurs (C) No mechanical work is done by the system (D) All 'a', 'b' & 'c' 03. The thermal efficiency of a heat engine giving an output of 4 KW with an input of 10000 Joules/sec is __________ percent. (A) 40 (B) 80 (C) 100 (D) 25 04. A fine grained grinding wheel should not be used for grinding __________ materials. (A) Hard (B) Brittle (C) Soft & ductile (D) None of these 05. Piezoelectric is a material (A) Whose properties is midway between the constituent materials (B) Which gets polarised, when stressed (C) In which magnetising force reduces when current flowing through it is increased (D) Which changes dimensions due to applied field 06. Which of the following metals occurs in nature in their free metallic state? (A) Au & Ag (B) Pb & Zn (C) Cu & Ni (D) None of these 07. Carburettor in a spark ignition engine is used to (A) Mix air-fuel in the desired ratio (B) Maintain a constant speed at varying loads (C) Adjust the stroke length (D) Increase the compression ratio 08. The standard instrument used for calibrating the load applied by universal testing machine is called (A) Extensometer (B) Spring balance (C) Dynamometer (D) None of these 09. Light year is the unit of (A) Distance (B) Time (C) Intensity of light (D) None of these 10. Lead is most readily dissolved in (A) Acetic acid (B) Hydrochloric acid (C) Nitric acid (D) Sulphuric acid 11. Which of the following alloying elements when added in steel does not improve its machinability? (A) Sulphur (B) Phosphorous (C) Copper (D) Lead 12. A boy weighing 110lb climbs up a 50 ft high vertical destination in 100 seconds. Horse power of the boy is __________ hp. (A) 0.1 (B) 0.5 (C) 0.8 (D) 1 13. Aluminium oxide (an abrasive) is used for grinding (A) Ceramics (B) High speed steel (C) Cemented carbide (D) None of these 14. On an average __________ fast neutrons are produced by nuclear fission of each atom of uranium-235. (A) 1 (B) 2.5 (C) 3.5 (D) 7 15. Ceramic tips for the cutting tool are prepared from __________ powder. (A) Carbon (B) Silicon carbide (C) Aluminium oxide (D) Tungsten Submit Test Next Quiz Tests: Set 01 Set 02 Set 03 Set 04 Set 05 Set 06 Set 07 Set 08 Set 09 Set 10 Set 11 Set 12 Set 13
