Chemical Engineering MCQs [Set 3]

21. Window panes of aeroplanes are normally made of
(A) Perspex (PMMA)
(B) Teflon (PTFE)
(C) Bakelite (phenol formaldehyde)
(D) Polystyrene

22. Galvanic corrosion cannot be prevented by
(A) Cathodic protection
(B) Anodic protection
(C) Usage of largest possible anodic area
(D) Any one of these

23. Babbitt lining is used on brass/bronze bearings to increase the
(A) Antifriction properties
(B) Compressive strength
(C) Bearing resistance
(D) Wear resistance

24. Ceramic compounds as compared to metallic compounds
(A) Crystallise faster
(B) Resist greater tensile stress at room temperature
(C) Have higher melting temperature
(D) Are better conductor of electricity at higher temperature

25. __________ has the highest melting point out of the following.
(A) Tungsten
(B) Zirconium
(C) Molybdenum
(D) Tantalum

26. Air-petrol ratio for maximum power generation in spark ignition engine is about
(A) 6 : 1
(B) 12 : 1
(C) 18 : 1
(D) 24 : 1

27. The most serious manufacturing defect from fracture toughness point of view is
(A) Surface roughness
(B) Pores
(C) Spherical inclusion
(D) Crack

28. In an amorphous material, atoms defy any definite atomic structure and exist in random pattern just like in liquid. Which of the following is an amorphous material?
(A) Tin
(B) Lead
(C) Zinc
(D) Glass

29. 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

30. The dew point temperature lines on psychrometric charts are straight inclined sloping downwards to the right. When relative humidity of moist air is 100%, then
(A) Wet bulb temperature=dry bulb temperature
(B) Wet bulb temperature=dew point temperature
(C) Saturation temperature=dew point temperature
(D) All ‘a’, ‘b’ & ‘c’

Updated: 29th June 2019 — 8:23 PM

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