Chemical Engineering Basics MCQ Solved Paper for CEED

1. Flue gases pass through the following boiler accessories in a high pressure natural circulation boiler.
A. Induced draft fan
B. Economiser
C. Air preheater
D. Steam superheater Which of the following gives the correct sequence of flow of the flue gases through the above mentioned boiler accessories?
A. A, C, B, D
B. D, B, C, A
C. D, C, B, A
D. D, A, B, C
Answer : B

2. The highest stress that a material can withstand for a specified length of time without excessive deformation is called the __________ strength.
A. Creep
B. Endurance
C. Fatigue
D. None of these
Answer : A

3. The bolt is subjected to __________ when the nut is tightened by putting the washer beneath it.
A. Tension
B. Shear
C. Compression
D. Bending & tension
Answer : A

4. Routing in production, planning & control is concerned with the
A. Sequence of operation to be performed
B. Progress of work performed
C. Authorisation of work to be performed
D. Balancing of load on machines
Answer : A

5. Sand used to stop the green sand from sticking to the pattern is termed as the __________ sand.
A. Parting
B. Synthetic
C. Loam
D. Dry
Answer : A

6. Oxyacetylene reducing flame is used while carrying out welding on
A. Alloy steel
B. Grey cast iron
C. Mild steel
D. High carbon steel
Answer : C

7. Which of the following are made out of the carbon steel having carbon content of 0.9 to 1%?
A. Small punches, broaches reamers and springs
B. Cutlery, screws, rivets and files
C. Mandrels, twist drills, small lathe tools and razors
D. Forgings like can shaft, structural steel plate, threading dies and drawing dies
Answer : A

8. The __________ of a double acting reciprocating pump as compared to the single acting pump will be almost double.
A. Flow output
B. Head developed
C. Overall efficiency
D. Weight
Answer : A

9. As the fluid flow rate increases, the float of the Rotameter
A. Rises in the tube
B. Rotates at higher speed
C. Rotates at lower speed
D. Drops down in the tube
Answer : A

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

11. __________ is the hardest oxide and is hence used where high wear resistance at high temperature is required.
A. Beryllium
B. Zirconia
C. Alumina
D. Magnesia
Answer : C

12. Lap joints are preferred over butt joints in soldering/brazing, because these joints are
A. Weaker in tension but stronger in shear
B. Weaker in shear but stronger in tension
C. Stronger in both shear and tension
D. The lap joints are easily made
Answer : D

13. Vibration upto 100 kilo hertz can be most accurately measured by a __________ type accelerometer.
A. Preloaded spring
B. Piezoelectric
C. Bonded strain gauge
D. None of these
Answer : B

14. Pressure exerted by a liquid depends upon its
A. Surface tension
B. Density
C. Viscosity
D. Buoyancy
Answer : B

15. __________ is not a case hardening process.
A. Carburising
B. Nitriding
C. Cyaniding
D. Annealing
Answer : A

16. Titanium is produced by __________ of Ti Cl₄.
A. Electrolytic reduction
B. Calcium reduction
C. Magnesium reduction
D. Thermal dissociation
Answer : C

17. __________ of air does not increase with increase in temperature.
A. Density
B. Thermal diffusivity
C. Viscosity
D. Thermal conductivity
Answer : A

18. Metallic surveying tapes are made of __________ which has a low co-efficient of expansion & enough strength.
A. Invar
B. Hastelloy
C. Duralumin
D. Monel metal
Answer : A

19. Silicon percentage in acid resistant cast iron is about
A. 4
B. 8
C. 14
D. 20
Answer : A

20. Galvanic corrosion cannot be prevented by
A. Cathodic protection
B. Anodic protection
C. Usage of largest possible anodic area
D. Any one of these
Answer : B

21. Which of the following is an ore dressing operation?
A. Classification
B. Smelting
C. Roasting
D. None of these
Answer : A

22. A reduction in thermal resistance during heat transfer does not occur in the
A. Convection heat transfer by stirring the fluid and cleaning the heating surface
B. Conduction heat transfer by reduction in the material thickness and increase in the thermal conductivity
C. Radiation heat transfer by increasing the temperature and reducing the emissivity
D. None of these
Answer : C

23. Which one is neutral in character?
A. N₂O₄
B. N₂O
C. N₂O₅
D. N₂O₃
Answer : B

24. Secondary hardening in steels arises out of the
A. Precipitation of fine alloy carbides at high temperatures
B. Refinement of ferrite grain size by working
C. Decomposition of retained austenite upon heat treatment
D. Precipitation of complex inter-metallic upon heat treatment
Answer : C

25. Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother?
A. Cresylic acid
B. Xanthaies
C. Pine oil
D. All 'a' 'b' & 'c'
Answer : B

26. The most economical channel section for the fluid flow is the one for which the discharge is maximum for a given cross-sectional area. Vertical velocity distribution in an open channel for laminar flow can be assumed to be
A. Parabolic
B. Hyperbolic
C. Straight line
D. None of these
Answer : A

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

28. Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of Portland cement. The component of Portland cement which first hardens is
A.
B.
C.
D.
Answer : A

29. To improve the machinability of steel, it is generally subjected to
A. Spheroidising
B. Tempering
C. Normalising
D. Annealing
Answer : A

30. The most commonly used moderator in nuclear power plants is
A. Graphite
B. Light water
C. Heavy water
D. Beryllium
Answer : A

31. The substance used as a smoke screen in warfare is
A. C2H2
B. SiCl4
C. P2O5
D. PCl5
Answer : B

32. Ferromagnetic materials owe their properties to __________ inner sub-shells.
A. Completely filled
B. Partially filled
C. Equally filled
D. Vacant
Answer : B

33. The lightest non-inflammable gas is
A. H2
B. He
C. Ar
D. O2
Answer : B

34. Carbon supply in pack carburising process is in the form of
A. Charcoal
B. Calcium carbide
C. Hydrocarbon oil
D. Graphite
Answer : A

35. Which of the following is used to produce draught in the locomotive boilers?
A. Chimney
B. Induced draught fan
C. Forced draught fan
D. Steam jet arrangement
Answer : D

36. In case of compression of one kg of air, the work done will be the least, when the value of polytropic index 'n' is
A. 1
B. 1.4
C. 1.5
D. Y = C_p/C_v
Answer : A

37. For grinding of softer materials, the grinding wheel should have __________ grain size.
A. Finer
B. Coarser
C. Medium
D. Any type of
Answer : B

38. Which of the following is the correct nature of shear stress distribution along the cross section in a horizontal circular pipe under steady state fluid flow condition?
A.
B.
C.
D.
Answer : C

39. Biological shield in a nuclear reactor is generally provided to protect against the
A. ?-rays
B. ?-rays
C. Gamma rays & neutrons
D. Electrons
Answer : C

40. Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same force. The strain produced in the two wires will be in the ratio of
A. 1 : 1
B. 1 : 2
C. 2 : 1
D. 1 : 4
Answer : A

41. Batch process is preferred over continuous process, when the
A. Product yields and quality cannot be achieved in continuous process, because of long residence time
B. Sales demand of product is not steady
C. Same equipment cannot be used for several processes of the same nature
D. All (A), (B) & (C)
Answer : B

42. Plastics as a material of construction suffer from the drawback of low
A. Machinability
B. Density
C. Strength
D. Plastic deformation
Answer : C

43. Electrical conductivities of semi-conductors are of the order of __________ ohm/cm.
A. 10^-3
B. 10³
C. 10^-15
D. 10¹⁵
Answer : A

44. A solar cell converts the sunlight directly into __________ energy.
A. Thermal
B. Electrical
C. Mechanical
D. Chemical
Answer : B

45. Fatigue resistance of a material is measured by the
A. Elastic limit
B. Ultimate tensile strength
C. Young's modulus
D. Endurance limit
Answer : D

46. Transition from laminar flow to turbulent flow in fluid flow through a pipe does not depend upon the
A. Length of the pipe
B. Diameter of the pipe
C. Density of the fluid
D. Velocity of the fluid
Answer : A

47. The difference in one unit of Rockwell hardness number corresponds to a difference in the depth of indentation of __________ mm.
A. 0.001
B. 0.01
C. 0.002
D. 0.02
Answer : C

48. The minimum and the maximum number of members required to form a Private Limited Joint Stock Company are respectively
A. 7 and 30
B. 10 and 50
C. 2 and 50
D. 13 and 55
Answer : C

49. An atom bomb works on the principle of
A. Nuclear fission
B. Nuclear fusion
C. Both the nuclear fission & fusion
D. Ionisation
Answer : A

50. Stellite is a __________ material.
A. Ferrous
B. Ceramic
C. Cemented carbide
D. Non-ferrous cast alloy cutting tool
Answer : D