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IBPS Clerk - Chemical Engineering Basics 1000+ MCQ [Solved] PDF Download

Thursday 9th of March 2023

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1. Chlorine acts as a bleaching agent only in the presence of
A. Dry air
B. Pure oxygen
C. Moisture
D. Sunlight
Answer : C
2. More than 95% of __________ is present in corundum.
A. SiO2
B. Al2O3
C. CaSiO2
D. MgO
Answer : B
3. The following type of bonding is strongly directional in solids.
A. Vander Waal's
B. Ionic
C. Metallic
D. Covalent
Answer : D
4. __________ of test specimens is not involved in any hardness testing method.
A. Fracture
B. Indentation
C. Wear
D. Scratch
Answer : A
5. In the blast furnace, incorporation of water vapour in the blast gives the following effect.
A. Increases the reducing potential of the gas
B. Increases the flame temperature
C. No significant change occurs
D. Increases the hydrogen content in the metal
Answer : A
6. The taper provided on pattern for its easy & clean withdrawal from the mould is termed as the __________ allowance.
A. Casting
B. Pattern
C. Draft
D. Distortion
Answer : C
7. In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is __________ °C.
A. 20
B. 60
C. 120
D. ?
Answer : D
8. Which of the following is a boiler accessory
i.e., not a boiler mounting?
A. Blow off cock
B. Feed check valve
C. Feed water pump
D. Stop valve
Answer : C
9. Minimum number of members required to form a Public Limited Joint Stock Com-pany is
A. 7
B. 10
C. 12
D. 17
Answer : A
10. 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
Answer : A
11. Which one can be directly solidified from gaseous state without entering into liquid state?
A. Helium
B. Oxygen
C. Carbon dioxide
D. None of these
Answer : C
12. Satellites burn off during re-entry to earth's atmosphere, because of the
A. Combustion with air
B. Gravitational pull by earth
C. Friction with earth's atmosphere
D. Loss in weight of the satellite
Answer : C
13. Maximum consumption of limestone is in the __________ industry.
A. Iron and steel
B. Cement
C. Glass
D. Fertiliser
Answer : D
14. __________ is the most suitable lubricant for drawing mild steel wires?
A. Kerosene
B. Water
C. Sodium stearate
D. Lime water
Answer : C
15. Damage to metal surface by mechanical action is called
A. Pitting
B. Corrosion
C. Erosion
D. None of these
Answer : C
16. 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
17. 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
Answer : C
18. The pressure outside a bubble/droplet of liquid is __________ the internal pressure.
A. Greater than
B. Less than
C. Equal to
D. Unpredictable; depends on the bubble size
Answer : B
19. The diffusion co-efficient of Ni in Cu at 1000 K is 1.93 × 10-16 m2S-1 and it is 1.94 × 10-14 m2S- 1 at 1200 K. The activation energy (in k. J.mole-1) for the diffusion of Ni in Cu is
A. 130
B. 180
C. 230
D. 250
Answer : C
20. The elastic strain in copper is due to the
A. Motion of dislocations
B. Stretching of atomic bonds
C. Breakage of atomic bonds
D. None of the above
Answer : A
21. Pearlite comprises of
A. 87% cementite & 13% Fe
B. 87% ferrite & 13% cementite
C. 93.33% ferrite & 6.67% C
D. 87% ferrite & 13% C
Answer : B
22. The emf of a Deniell cell Zn | Zn2+ || Cu2+ | Cu can be increased by
A. Decreasing the surface area of the electrodes
B. Increasing the concentration of zinc sulphate solution
C. Increasing the surface area of the electrodes
D. Increasing the concentration of copper sulphate solution
Answer : D
23. Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by
A. Conduction
B. Convection
C. Radiation
D. Both 'a' & 'b'
Answer : C
24. Thermal equivalent of electrical power in practical calculation is __________ kcal/kWh.
A. 746
B. 3000
C. 1000
D. 550
Answer : B
25. Dryness factor of steam is defined as the ratio of the mass of vapor in the mixture to the mass of the mixture. Dryness factor of steam is measured by a __________ calorimeter.
A. Bomb
B. Throttling
C. Junker's
D. Boy's
Answer : B
26. Which of the following is not a charge material for cupola?
A. Limestone
B. Iron scrap
C. Iron ore
D. Pig iron
Answer : C
27. Lead is poured into the joint between two- __________ pipes.
A. Mild steel
B. Concrete
C. Cast iron
D. Asbestos cement
Answer : C
28. Alcohols are not suitable as diesel engine fuel because the cetane number of alcohols is
A. Very low which prevents their ignition by compression
B. Very high which prevents their ignition by compression
C. Zero
D. None of these
Answer : A
29. Change in volume of metals from absolute zero temperature to their melting points is
A. Almost same for all metals
B. Different for different metals
C. Less for low melting point metals
D. Less for high melting point metals
Answer : A
30. 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
31. __________ furnace is generally used in the non-ferrous foundries.
A. Direct arc
B. Indirect arc
C. Resistance
D. Induction
Answer : B
32. The pressure drop per unit length for laminar flow of fluid through a long pipe is proportional to (where, A = cross-sectional area of the pipe & D = Diameter of the pipe)
A. A
B. D
C. 1/A
D. 1/A2
Answer : C
33. The cooling rate required to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours is __________ BTU/hr.
A. 100
B. 200
C. 1000
D. 2000
Answer : B
34. Boiler tube size is specified by its thickness and __________ diameter.
A. Outside
B. Inside
C. Mean
D. None of these
Answer : A
35. High relative humidity decreases the evaporative process and as the temperature is increased, the relative humidity decreases. The comfort range for human body is the ambient temperature of 22 to 27°C with relative humidity ranging from __________ percent.
A. 5 to 10
B. 15 to 25
C. 45 to 50
D. 75 to 80
Answer : C
36. Load cells used for the measurement of weight has
A. Compact & rugged construction with an accuracy of 0.1 to 1%
B. No moving parts and incurs negligible deflection under load
C. Provision of thermal compensation and is hermetically sealed
D. All 'a', 'b' & 'c'
Answer : D
37. Stellite is a __________ material.
A. Ferrous
B. Ceramic
C. Cemented carbide
D. Non-ferrous cast alloy cutting tool
Answer : D
38. Good design of the casing of a centrifugal pump aims at minimising the
A. Cavitation
B. Frictional losses
C. Kinetic energy loss
D. Static head
Answer : C
39. __________ is not used as a material of construction in thermocouples.
A. Alumel
B. Rhodium
C. Constantan
D. Duralumin
Answer : D
40. __________ is the trade name assigned to a nonferrous cast alloy composed of cobalt, chromium & tungsten.
A. Stellite
B. High speed steel
C. Cermet
D. Alnico
Answer : A
41. Percentage of argon (by volume) in dry atmospheric air is about
A. 0.09
B. 0.3
C. 0.57
D. 0.94
Answer : D
42. Out of the following the refractive index is the highest for
A. Glass
B. Diamond
C. Brine
D. Kerosene
Answer : B
43. Ammonia gas can be dried by
A. PCl5
B. Quick lime
C. CaCl2
D. Concentrated H2SO4
Answer : B
44. Shrinkage allowance on pattern is provided to compensate for shrinkage when the
A. Metal changes from liquid state to solid state at freezing temperature
B. Solid phase temperature drops from freezing temperature to the room temperature
C. Liquid metal temperature drops from pouring temperature to room temperature
D. Liquid metal temperature drops from pouring temperature to freezing temperature
Answer : B
45. A dense structure of grinding wheel is not used for the
A. Ductile material
B. Hard materials
C. Brittle materials
D. Finishing cuts
Answer : A
46. The property of material, by which a given amount of energy is absorbed by it without plastic deformation, is called the
A. Resilience
B. Toughness
C. Ductility
D. Impact strength
Answer : A
47. Triple point of water is
A. 0°F
B. 492°R
C. 0°K
D. -273°C
Answer : A
48. The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by (T1 - T2)/T1. The co-efficient of performance (CO.P.) of a Carnot heat pump operating between T1 and T2 is given by
A. T1/(T1-T2)
B. T2/(T1-T2)
C. T1/T2
D. T2/T1
Answer : B
49. __________ is a special constituent of chlorophyll without which photosynthesis is not possible.
A. Calcium
B. Nitrogen
C. Phosphorous
D. Hydrogen
Answer : B
50. If a nuclear reactor produces more fissile nuclear fuel than it consumes, then it is called a __________ reactor.
A. Critical
B. Breeder
C. Fertile
D. Heterogeneous
Answer : B
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