ENGINEERING CAREER AND STUDY MATERIALS

*1 Which one of the following statements is NOT TRUE for a supersonic flow? A) Over a gradual expansion, entropy remains constant B) Over a sharp expansion corner, entropy can increase C) Over a gradual compression, entropy can remain constant D) Over a sharp compression corner, entropy increases *2 A supersonic airplane is expected to fly at both subsonic and supersonic speeds during its whole flight course. Which one of the following statements is TRUE? (A) Airplane will experience less stability in pitch at supersonic speeds than at subsonic speeds (B) Airplane will feel no change in pitch stability (C) Airplane will experience more stability in pitch at supersonic speeds than at subsonic speeds (D) Pitch stability cannot be inferred from the information given *3 Which one of the following criteria leads to maximum turn rate and minimum radius in a level turn flight? A) Highest possible load factor and highest possible velocity B) Lowest possible load factor and lo

1.  As the concentration of point defects in a crystal increases, its configurational entropy A) does not change B) decreases C) increases D) initially increases and then decreases 2. Critical value of the Gibbs energy of nucleation at equilibrium temperature is A) zero B) infinite C) positive D) negative 3. With respect to the matrix of Al-Cu alloys, G-P zones are A) coherent B) incoherent C) semi-coherent D) chemically indistinguishable 4. Which one of the following techniques does NOT require quenching to obtain final case hardness? A) Flame hardening B) Induction hardening C) Nitriding D) Carburizing

1.Fire is a combination of a) Fuel, light and Wood, oxygen b) Fuel, heat and carbon dioxide c) Fuel, heat and oxygen d) Fuel, light and nitrogen and Carbon Dioxide e) None of the above Answer:  (c) fuel, heat and oxygen 2. The best way of avoiding accident is by a) Doing work in proper way without PPE b) Doing work in one's own way c) Using safety equipment d) Observing safety rules related to job, machine and workplace  e) None of the above Answer:  d) Observing safety rules related to job, machine and workplace  3. In case of an accident, the victim should immediately be a) Asked to take rest b) Enquired about the accident c) left to himself without treatment d) Attended  e) None of the above Answer:  d) Attended 

* A 1.5mm displacement of tool point in boring operation will result in a change in the diameter equal to? A) 1.65 mm B) 2.5 mm C) 4 mm D) 3 mm Answer: D) 3 mm * The temperature to which a work piece is heated depends on the material and the type of forging process, the temperature range for forging low carbon steel is? A) 700 - 900 Degree Celsius B) 800 - 1300 Degree Celsius C) 450 - 820 Degree Celsius D) 450 - 600 Degree Celsius Answer: B) 800 - 1300 Degree Celsius * Which taper is used on spindle nose of the lathe head stock? A) Morse taper B) Brown and sharp taper C) Thermo Taper D) Yellow Taper Answer: A) Morse taper

* The material with lowest resistivity is A) constantan. B) silver. C) manganin. D) nichrome. Answer*: B) silver. * Phenol and Formaldehyde are polymerised to a resultant product known as (A) PVC. (B). teflon. (C) polyester. (D) bakelite Answer*: (D) bakelite * Dielectric materials are (A) Insulating materials. (B) Semiconducting materials. (C) Magnetic materials. (D) Ferroelectric materials. Answer*: (A) Insulating materials. *The property due to which the resistance of some metal or compound vanishes under certainconditions is (A) Semi conductivity. (B) Super conductivity. (C) Curie point. (D) Magnetostriction. Answer*: (B) Super conductivity. * Thermocouples are used for the measurement of (A) temperature. (B) pressure. (C) Couples (D) density. Answer*: (A) temperature.