Chemical Engineering Questions and Answers - Set 35 - ObjectiveBooks

Chemical Engineering Questions and Answers - Set 35

Practice Test: Question Set - 35

1. Which of the following alloying elements is present in maximum percentage in high speed steel?
    (A) Molybdenum
    (B) Chromium
    (C) Tungsten
    (D) Vanadium

2. Strain hardening effect in a metal subjected to cold working is due to the __________ mechanism.
    (A) Fracture
    (B) Dislocation
    (C) Slip
    (D) Twinning

3. The main constituent of bones is
    (A) CaF2
    (B) Ca3(PO4)2
    (C) CaCO3
    (D) CaCl2

4. Pick out the correct statement about the condensation.
    (A) Filmwise condensation gives a lower heat transfer rate than the dropwise condensation
    (B) Suitable coating or vapor additive is used to promote film wise condensation
    (C) If a condensing liquid does not wet the surface dropwise, even then condensation will take place on it
    (D) Reynolds number of condensing liquid is based on its mass flow rate

5. When an isolated thermodynamic system executes a process,
    (A) Work is done
    (B) Heat transfer takes place
    (C) Mass flow occurs across the boundary of the system
    (D) No chemical reaction takes place within the system

6. Temperature attained in soldering of metals is about __________ °C.
    (A) 150-300
    (B) 400-500
    (C) 650-800
    (D) 1000-1100

7. A material is capable of resisting softening at high temperature, because of its property termed as
    (A) Hot temper
    (B) Hot hardness
    (C) Fatigue
    (D) Creep

8. Which of the following are considered applications of ultrasonic testing?
    (A) Determination of elastic constant
    (B) Detection of defects in metal
    (C) Measurement of material thickness
    (D) None of the above

9. Which of the following heat treatment processes is usually applied to castings?
    (A) Tempering
    (B) Annealing
    (C) Normalizing
    (D) Carburizing

10. Pick out the wrong statement.
    (A) Complete unity of command exists in a line organization
    (B) Line organization is net suitable for expansion and growth of an industry
    (C) In line and staff organization, "line" executes and "staff directs
    (D) None of these

11. Atomic __________ of an element is a whole number.
    (A) Weight
    (B) Number
    (C) Volume
    (D) Radius

12. Most important property of steels for use in automobile bodies is the
    (A) Formability
    (B) Yield strength
    (C) Toughness
    (D) Resilience

13. Strain hardening effect in metals subjected to cold working is due to the __________ mechanism.
    (A) Slip
    (B) Fracture
    (C) Winning
    (D) Dislocation

14. Preheating before welding is done to
    (A) Make the plate softer
    (B) Burn oil & grease sticking to plate surfaces
    (C) Avoid plate distortion
    (D) Prevent cold cracks

15. Hardening of steel is not possible, unless it is heated __________ critical point.
    (A) Above the highest
    (B) Above the lowest
    (C) Between the first & second
    (D) Between the second & third

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