Chemical Engineering Basics Question Paper MCQ - Set 48 - ObjectiveBooks

Chemical Engineering Basics Question Paper MCQ - Set 48

Practice Test: Question Set - 48

1. Parallel straight line pattern of temperature distribution for both hot and cold fluids is observed in case of heat exchanger of the type
    (A) Parallel flow with equal heat capacities
    (B) Counter flow with equal heat capacities
    (C) Counter flow with unequal heat capacities
    (D) Parallel flow with unequal heat capacities

2. The behavior of a metal specimen, which when plastically strained in tension reduces its yield stress in compression and vice versa; is termed as the
    (A) Work hardening
    (B) Bauschinger effect 
    (C) Creeping effect
    (D) Stress recovery effect

3. Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air (h = 20W/m2 .k), when the insulation thickness is __________ mm.
    (A) 15
    (B) 25
    (C) 10
    (D) 30

4. Yield strength of a polycrystalline metal with an average grain size ‘d’, is proportional to
    (A) d1/2
    (B) d-1/2
    (C) d
    (D) d-1

5. Out of the following substances, one ton of __________ will store the maximum heat for a rise of 30°C in temperature.
    (A) Steel
    (B) Lignite
    (C) Water
    (D) Lime stone

6. The passage between the nozzle and the __________ is called 'sprue' in case of injection moulding.
    (A) Runner
    (B) Cylinder
    (C) Mold
    (D) None of these

7. On decreasing the grain size of a polycrystalline material, the property most likely to deteriorate is
    (A) Creep
    (B) Toughness
    (C) Tensile strength
    (D) Fatigue

8. Identify the false statement
    (A) Martensitic steels are less susceptible to pitting corrosion than austenitic steels
    (B) Pitting corrosion is usually very localized
    (C) Hydrogen embrittlement is facilitated by tensile stress
    (D) Stress corrosion cracking is facilitated by tensile stress

9. 'Dikes' are low height walls made around the storage vessels meant for storing hazardous & inflammable material (e.g., petroleum products). Volume of dikes is equal to (where, V = volume of the storage vessel)
    (A) V
    (B) V/2
    (C) 2V
    (D) 3V

10. The condition of diffraction from a crystal is given by
    (A) nλ = 2d Sin θ
    (B) λ = d Sin 2θ
    (C) λ = 2d Sin 2θ
    (D) nλ = d Sin θ

11. Pick out the wrong statement.
    (A) The equivalent stiffness of two springs (of equal stiffness 'S') in series is S/2 while in parallel is 2S
    (B) For a helical spring, deflection is proportional to D3 (D = mean coil diameter) or d4 (d = wire diameter)
    (C) Crushing load or columns is less than the buckling load
    (D) Modulus of resilience is proportional to (stress at elastic limit)2 

12. The life of a ball bearing is inversely proportional to
    (A) (Load)1
    (B) (Load)2
    (C) (Load)3
    (D) (Load)0.33

13. Air intake for an air compressor should be preferably taken from
    (A) A site, where cooling towers are located nearby
    (B) A site, where open coal yard in located nearby
    (C) An air conditioned room maintained at a temperature of 18°C
    (D) An outside atmosphere at 10°C

14. Corrosion rate cannot be lowered by reducing the __________ of the corroding medium.
    (A) Concentration
    (B) Velocity
    (C) Temperature
    (D) None of these

15. Ammonia gas can be dried by
    (A) PCl5
    (B) Quick lime
    (C) CaCl2
    (D) Concentrated H2SO4

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