Chemical Engineering Quiz Questions & Answers - Set 09 Chemical Engg. Quiz Quiz Questions - Set 09 01. Filler metal is used in __________ welding. (A) Braze (B) Electric spot (C) Projection (D) Seam 02. 'End cooler' or 'after cooler' is employed in air compressor mainly to (A) Remove oil vapour or moisture from air (B) Cool the dry air before use (C) Reduce the volumetric capacity of receiver (D) None of these 03. Heat transfer by radiation from a hot body will be most rapid, if its surface is __________ because of its higher emissivity. (A) White & rough (B) Black & rough (C) White & polished (D) Black & polished 04. Out of the following, the best material capable of withstanding shock & vibration without the danger of cracking is (A) Malleable iron (B) Grey cast iron (C) Chilled cast iron (D) White cast iron 05. A controller action in which there is a continuous relation between the values of controlled variable and the rate of change of controlled output signal is called the __________ action. (A) Proportional (B) Integral (C) Derivative (D) None of these 06. Acetylene should never be conveyed through __________ pipe, as it forms an unstable compound that dissociates violently at the slightest shock. (A) Stainless steel (B) Copper (C) Aluminium (D) Brass 07. Pick out the wrong statement. (A) In a thin spherical shell under internal pressure, hoop stress is equal to the half of axial stress (B) Thermoplastic material does not follow Hooke's law of elasticity (C) Components under longitudinal compression is called 'struts' and the load under which strut fails is called crippling or buckling load (D) 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 08. __________ cycle is the most efficient thermodynamic cycle. (A) Diesel (B) Otto (C) Rankine (D) Carnot 09. In which of the following reactions, application of vacuum will help? (A) Number of gas molecules in the product side is more than that on the reactant side (B) Number of gas molecules in the reactant side is more than that on the product side (C) Number of gas molecules are the same on both the reactant & the product side (D) None of the above 10. An orthotropic material is a special class of anisotropic material, which is described by their properties in three perpendicular directions. An example of orthotropic material is (A) Stainless steel (B) Cast iron (C) Wood (D) Teflon 11. Maxwell's thermodynamic relations applies to the (A) Chemical systems in equilibrium (B) Mechanical systems in equilibrium (C) Irreversible thermodynamic processes (D) Reversible thermodynamic processes 12. High __________ of cast iron makes it suitable for use in machine beds. (A) Compressive strength (B) Endurance strength (C) Damping capacity (D) Tensile strength 13. Sudden immersion/dipping of red hot steel bar in water makes it (A) Malleable & tough (B) Ductile & soft (C) Brittle & hard (D) None of these 14. Color of brass changes from yellow to __________ after its dezincification which exemplifies selective leaching. (A) Grey (B) Red (C) Orange (D) Violet 15. First empirical temperature scale conceived is the __________ temperature scale. (A) Absolute (B) Reaumer (C) Fahrenheit (D) Celsius 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
