Chemical Engineering Basics MCQ Solved Paper for FCI Recruitment

1. An abrupt and sudden fall in the reading of barometer is an indication of the
A. Storm
B. Rain
C. Clear weather
D. Cold wave
Answer : A

2. In a good rimming steel
A. Carbon and silicon should be low
B. Silicon should be low but carbon should be high
C. Both silicon & carbon should be high
D. Silicon should be high but carbon should be low
Answer : A

3. Heat release during phase change is observed in case of a/an
A. Boiler
B. Condenser
C. Evaporator
D. All (A), (B) & (C)
Answer : B

4. __________ furnace is generally used in the non-ferrous foundries.
A. Direct arc
B. Indirect arc
C. Resistance
D. Induction
Answer : B

5. Which of the following is resistant to the action of both heat & chemicals?
A. Borosilicate glass
B. Silica glass
C. Soda lime glass
D. None of these
Answer : A

6. Recrystallisation temperature of steel is __________ °C.
A. 50
B. 300
C. 500
D. 800
Answer : D

7. __________ 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

8. For separating small pieces of metal from engine oil of a car, the best separating technique is the
A. Chromatography
B. Evaporation
C. Filtration
D. Fractional distillation
Answer : C

9. On oscilloscope screen for dynamic measurement, lissajous diagram is normally used to determine the __________ of the input signal.
A. Frequency
B. Amplitude
C. Damping
D. None of these
Answer : A

10. Euler number is defined as the ratio of inertia force to __________ force.
A. Pressure
B. Elastic
C. Gravity
D. Viscous
Answer : A

11. What happens, when SO₂ is passed through a solution of H2S in water?
A. Precipitation of sulphur takes place
B. H₂SO₃ is formed
C. Oleum is formed
D. None of these
Answer : A

12. Electrostatic separation of minerals from each other is based on their differences in the following property.
A. Densities
B. Magnetic permeabilities
C. Electrical conductivities
D. Hardness
Answer : C

13. Blast furnace slag is mainly molten
A. Sand
B. Magnesium silicate
C. Calcium silicate
D. Iron pyrite
Answer : C

14. Reynolds number of a fluid flowing in a circular pipe is 10,000. What will be the Reynolds number when the fluid velocity is decreased by 30% & the pipe diameter is increased by 30%?
A. 9,100
B. 13,000
C. 7,000
D. 2,550
Answer : A

15. Which of the following test is used for distinguishing among dry oils, semi-drying oils and non drying oils?
A. Elaiden test
B. Reichert-Meissl value test
C. Hunter value test
D. Iodine value test
Answer : A

16. A material being tested for endurance strength is subjected to the __________ load.
A. Impact
B. Completely reversed
C. Dynamic
D. Static & dynamic
Answer : B

17. 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
Answer : B

18. 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
Answer : B

19. For preparation of porous bearings by powder metallurgy, preferred particle shape is
A. Spherical
B. Nodular
C. Irregular
D. No preferred shape
Answer : A

20. The same volume of all gases is representative of their
A. Specific gravities
B. Densities
C. Gas characteristic constants
D. Molecular weights
Answer : D

21. Venturimeter is used to measure the flow rate of fluids in pipes, when the pipe is in __________ position.
A. Horizontal
B. Vertical
C. Inclined
D. Any
Answer : D

22. 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
Answer : D

23. Fatigue limit improvement by over stressing the metal by successively increasing the load is called coaxing. In fatigue failure, the material fails
A. Below the yield point
B. Above the yield point
C. Below the elastic limit
D. At the elastic limit
Answer : A

24. For dynamic strain measurement, the Wheatstone bridge used is of __________ type.
A. Voltage sensitive null
B. Voltage sensitive deflected
C. Current sensitive deflected
D. None of these
Answer : B

25. Pick out the wrong statement.
A. Weldability of high carbon steel is poorer compared to low carbon steel
B. Invar is a magnetic alloy
C. Magnetic permeability of the diamagnetic material is less than one
D. Martenistic transformation never goes to completion (i.e., 100%) at room temperature
Answer : B

26. __________ joint is mostly used for joining pipes carrying water at low pressure.
A. Nipple
B. Socket
C. Union
D. Bell and spigot
Answer : B

27. The only suitable method for hardening the low carbon steel is case hardening. Which of the following is a case hardening process?
A. Cyaniding
B. Sherardizing
C. Spheroidising
D. None of these
Answer : A

28. __________ circuit is most commonly used to measure strain with the help of a strain gauge.
A. Ballast
B. Voltage balancing potentiometric
C. Simple current sensitive
D. None of these
Answer : B

29. Eutectoid composition of carbon steel at room temperature is
A. Cementite
B. Pearlite
C. Martensite
D. Ferrite
Answer : B

30. Out of the following the refractive index is the highest for
A. Glass
B. Diamond
C. Brine
D. Kerosene
Answer : B

31. Alloys having more than 80% copper are generally more
A. Abrasion resistant
B. Corrosion resistant
C. Prone to season cracking
D. Machinable
Answer : B

32. 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

33. Which of the following is the most suitable abrasive for grinding high tensile strength materials?
A. Silicon carbide
B. Corundum
C. Aluminium oxide
D. Boron carbide
Answer : C

34. According to maximum shear stress failure criterion, yielding in material occurs, when the maximum shear stress is equal to __________ times the yield stress.
A. 0.5
B. 2
C. ?2
D. ?3/2
Answer : A

35. Broaching tools are usually made of
A. Cermets
B. High speed steel
C. Tungsten carbide
D. Stellite
Answer : B

36. Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity)
A. 1/k
B. k
C. k²
D. 1/k²
Answer : B

37. A metal having a Poisson's ratio = 0.3 is elastically deformed under uniaxial tension. If the longitudinal strain = 0.8, then the magnitude of thickness strain is
A. -0.8
B. 0.8
C. +0.08
D. -0.24
Answer : D

38. Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called
A. Tempering
B. Hardening
C. Annealing
D. Normalising
Answer : C

39. A high pressure boiler generates steam at a pressure greater than __________ kg/cm².
A. 10
B. 30
C. 50
D. 80
Answer : D

40. 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 vapour 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
Answer : B

41. Quartz is a __________ material.
A. Diamagnetic
B. Ferromagnetic
C. Ferroelectric
D. Piezoelectric
Answer : D

42. Maximum change in the hardness of martensite occurs in the carbon content range of __________ percent in steel.
A. 0.01 to 0.10
B. 0.2 to 0.4
C. 0.5 to 0.7
D. 0.8 to 1.0
Answer : B

43. Fog is an example of colloidal system of
A. Solid dispersed in gas
B. Solid dispersed in liquid
C. Liquid dispersed in gas
D. Gas dispersed in liquid
Answer : C

44. __________ property of a material is determined by the Herbert Pendulum device.
A. Hardness
B. Tensile
C. Toughness
D. Compressive
Answer : A

45. Softening of hardened steel is done by its
A. Normalising
B. Tempering
C. Annealing
D. Carburising
Answer : A

46. Transition from laminar to turbulent zone in free convection heat transfer is governed by the critical value of
A. Grashoff number
B. Grashoff number & Reynolds number
C. Reynolds number
D. Grashoff number & Prandtl number
Answer : D

47. Hydrogen in liquid steels is dissolved
A. As tiny gas bubbles
B. In the atomic form
C. In the ionic form
D. In the molecular form
Answer : A

48. 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

49. Matte smelting is used in the extraction of
A. Lead
B. Zinc
C. Aluminium
D. Copper
Answer : D

50. Shampoos are commercially not available in the form of
A. Powder
B. Gaseous mixture
C. Solution
D. Emulsion
Answer : B