KMC Mechanical SAE Previous Year 2022 Question Papers with Answers

The Kolkata Municipal Corporation (KMC) conducts recruitment exams for the position of Sub Assistant Engineer (SAE) in the mechanical discipline. This exam serves as an opportunity for aspiring candidates to join the prestigious municipal corporation and contribute to the development and maintenance of mechanical infrastructure in Kolkata.

Here is an overview of the Kolkata Municipal Corporation(KMC) Mechanical SAE Exam:

Eligibility Criteria:

• Educational Qualification: Candidates must possess a diploma in Mechanical Engineering from a recognized university or institution.
• Age Limit: The age limit varies and is typically between 18 to 37 years, with age relaxations for reserved categories as per government norms.

Exam Pattern:

• The exam generally consists of multiple-choice questions (MCQs) that assess the candidate’s knowledge and understanding of mechanical engineering concepts.

Below is the detailed Kolkata Municipal Corporation(KMC) Exam Pattern 2023.

• A total number of 100 questions are asked.
• The exam will be conducted for 200 marks.
• Each question carries 2 marks.
• There is a negative marking of 1/3 mark for each wrong answer

Syllabus:

The syllabus for the mechanical engineering section typically includes subjects such as Thermodynamics, Fluid Mechanics, Strength of Materials, Engineering Mechanics, Machine Design, Manufacturing Processes, and more. Candidates should thoroughly study these subjects and focus on core concepts to perform well in the exam.

No of Vacancies in KMC Exam:

The no of Vacancies are not specific but approximately 20-25 posts you may expect.

Admit Card:

• Admit cards are usually issued a few weeks before the examination date.
• Candidates can download the admit card from the official website using their registration Number.
• It is mandatory to carry the Admit card and a Government ID card to the exam center as it serves as proof of identity and allows entry into the examination hall.

Result and Selection Process:

• After the examination, the Kolkata Municipal Corporation(KMC) will release the eligible candidate selected for interviews(Must be qualified for final selection.)
• Final selection will be based on the candidate’s performance in 200 marks mechanical exam.

You can also practice WBPSC JE MECHANICAL ENGINEERING Previous Year (2018) Question Papers With Answers.

It is essential for aspiring candidates to stay updated with the official notifications, syllabus, and exam pattern provided by the Kolkata Municipal Corporation(KMC) for the Mechanical SAE exam. Diligent preparation, a strong understanding of mechanical engineering concepts, and regular practice will increase the chances of success in the exam and pave the way for a rewarding career in the Kolkata Municipality Corporation as a Sub Assistant Engineer in the mechanical discipline.

 N.B- All questions are taken from KMC exam’s original question paper to help students at free of cost. we try our best to provide the same questions, if any Questions found incorrect we really sorry for that, please give us your valuable feedback so that we can Improve ourselves to give you better content in future. Following exam of mechanical engineering held on 05/06/2022.

KMC SAE MECHANICAL (2020) QUESTION PAPER

1.In a beam of uniform strength, every section has same value of: 

(A) Bending moment  

(B) Bending stress 

(C) Strain 

(D) Moment of inertia 

2. One ton refrigeration machine implies that the machine: 

(A) Has a gross weight 1 ton  

(B) Consumes one ton of refrigerant in 24 hours 

(C) Has the capacity to convert one ton of water into ice  

(D) Is capable of extracting heat that would melt one ton of ice at 0°C into water at 0°C in a period of  24 hours 

3.A cantilever beam of length L. moment of inertia I. Young’s modulus E carries a concentrated  load W at the middle of its length. The slope of the cantilever at the free end is: 

(A) (WL^2)/(2EI) 

(B) (WL^2)/(4EI) 

(C) (WL^2)/(8EI) 

(D) (WL^2)/(16EI) 

4.The branch of science that deals with interactions of man with the machine is called as: 

(A) Aesthetics 

(B) Ergonomics 

(C) Economics 

(D) Statistics 

5. Thermal conductivity is defined as the heat flow per unit time: 

(A) When temperature gradient is unity 

(B) When a unit temperature difference is maintained across the opposite faces of the wall 

(C) Through a unit thickness of the wall 

(D) Across unit area when temperature gradient is unity 

6. Steel can be hardened quickly by the process of: 

(A) Induction hardening

(B) Nitriding 

(C) Cyaniding  

(D) Carburising 

7. During normalizing operation, the steel castings are cooled in: 

(A) Air 

(B) An oil bath  

(C) Water 

(D) The furnace itself 

8. A Zener diode is uses as: 

(A) An amplifier 

(B) A voltage regulator 

(C) A rectifier 

(D) A multivibrator 

9. The product El known as: 

(A) Section modulus 

(B) Modulus of rupture 

(C) Flexural rigidity 

(D) Polar modulus 

10.A refrigerator working on a reversed Carnot cycle has a COP of 5. If it is made to work as a  refrigerator taking 1 kW, the heating effect will be: 

(A) 1 kW  

(B) 4 kW 

(C) 5 kW  

(D) 6 kW 

11. To show the cross section of spokes (or limbs or arms) of a flywheel or pulley on the spoke  (limb/arm) itself. We can use:  

(E) Full section 

(F) Quarter section 

(G) Half section 

(H) Revolved/rotated section 

12. If the speed of the engine varies between 390 and 410 rpms in a cycle of operation, the  coefficient of fluctuation of speed will be:

(A) 0.01 

(B) 0.02 

(C) 0.04 

(D) 0.05 

13. The viscosity of a fluid in motion is 1 Poise. Then the viscosity (in Poise) when the fluid is at rest  will be: 

(A) 0  

(B) 0.5 

(C) 1 

(D) 2 

14. If a rotating system is dynamically balanced, it is statically: 

(A) Balanced 

(B) Unbalanced 

(C) Partially balanced 

(D) Unaffected 

15. The stress level below which a Specimen can withstand cyclic stress indefinitely without  exhibiting fatigue failure is called: 

(A) Elastic limit 

(B) Proportional limit 

(C) Endurance limit 

(D) Tolerance limit 

16. Shafts having their axes parallel but not in alignment are coupled together using: 

(A) Flanged coupling 

(B) Muff coupling 

(C) Universal coupling  

(D) Oldham coupling 

17. APN junction acts as a: 

(A) Controlled switch 

(B) Bidirectional switch 

(C) Unidirectional switch  

(D) None of the above

18. Short circuit test of a transformer helps to find: 

(A) Copper loss at no load 

(B) Iron loss at no load 

(C) Copper loss at any desired load 

(D) Iron loss a full load 

19. The shape of the bending moment diagram for a cantilever beam carrying a uniformly  distributed Load is: 

(A) A straight line 

(B) A hyperbola  

(C) An ellipse 

(D) A parabola 

20. At critical pressure: 

(A) Entropy is zero  

(B) Latent heat of vaporization is zero 

(C) Saturated vapour becomes a gas  

(D) Sublimation occurs from solid to vapour phase 

22. A cantilever beam is subjected to a bending moment of 24000 Nm. If the allowable bending  stress is stated to be 140 MPa, the section modulus would be nearest to: 

(A) 175 cm^3  

(B) 200 cm^3 

(C) 185 cm^3 

(D) 160 cm^3 

23. The chisels and files used in a fitting shop are generally made of:

(A) Cast iron 

(B) High carbon steel 

(C) Mild steel  

(D) Forged steel 

24. Heating elements and electrical resistance wires are generally made of: 

(A) Nichrome  

(B) Invar 

(C) Perm invar 

(D) White metal 

25. Fusible plug for a steam boiler consists of: 

(A) Bismuth, lead and tin 

(B) Bismuth, zine and tin 

(C) Zinc, copper and lead 

(D) Copper, lead and aluminum 

26. Mollier diagram is a plot of: 

(A) Temperature and entropy 

(B) Temperature and enthalpy 

(C) Pressure and enthalpy 

(D) Enthalpy and entropy 

27. High speed gears are made from plastics of the type:  

(A) Fibre glass 

(B) Capron 

(C) Foliate 

(D) Polythene 

28. A block resting on an inclined plane begins to slide down the plane when the angle of inclination  is gradually increased to 30°. Then the coefficient of friction between the block and the plane is: 

(A) 0.50 

(B) 0.578 

(C) 0.72 

(D) 0.866

29. For a heat engine operating on Carnot cycle, the work output is 1/4^th of the heat rejected to the  sink. The thermal efficiency of the engine would be: 

(A) 10% 

(B) 20% 

(C) 30%  

(D) 50% 

30. Select the proper sequence:

(A) Proportional limit, (B) Elastic limit, (C) Yielding, (D) Failure 

(A) B, C, A, D 

(B) B, A, C, D 

(C) A, C, B, D 

(D) A, B, C, D 

31. The phenomenon of progressing extension of the material, ie, strain increasing with time at a co  constant load is termed as: 

(A) Yielding 

(B) Creeping 

(C) Strain hardening  

(D) Enduring 

32. The Stefan-Boltzmann constant has units of:  

(A) Kcal/m²-hr-K^4 

(B) Kcal/m-hr-K^4 

(C) kcal/hr-K^4 

(D) kcal/m²-K^4 

33. The strain energy stored in a body due to external loading, within the elastic limit, is known as: 

(A) Malleability 

(B) Ductility 

(C) Toughness  

(D) Resilience 

34. A water main of 1 m diameter contains water at a pressure head of 100 meters. The permissible  Tensile stress in the material of main is 25 MPa. What is the minimum thickness of the water main?  (Take g-10 m/s²) 

(A) 10 mm 

(B) 20 mm 

(C) 50 mm

(D) 60 mm 

35. A simply supported beam of span and carrying a load W concentrated at the mid span will have  a maximum bending moment of: 

(A) WL/8 

(B) WL/4 

(C) WL/2 

(D) WL 

36. Use of pulverized coal in boiler furnace provides: 

(A) Smokeless burning 

(B) Better combustion 

(C) Less corrosion on furnace walls 

(D) High calorific value 

37. Absorptivity of a body is equal to its emissivity: 

(A) For a polished body 

(B) Under thermal equilibrium condition  

(C) At one particular temperature  

(D) At shorter wavelengths 

38. The ratio E/K between modulus of elasticity and bulk modulus for a material with Poisson’s  ratio u is: 

(A) 2(1-µ) 

(B) (3-2µ)  

(C) 3(1+µ) 

(D) 3(1-2µ) 

39. The working principle of thermocouple is based on: 

(A) Compton effect 

(B) Photo electric effect 

(C) Meissner effect  

(D) Seebeck effect 

40. In high-speed steels, the alloying element with maximum percentage: 

(A) Vanadium 

(B) Nickel 

(C) Tungsten

(D) Silicon 

41. As per IS:1570, C45 (or 45C8) steel will have a carbon percentage of: 

(A) 0.1-0.2% 

(B) 0.4-0.5% 

(C) 0.7-0.8% 

(D) 06-0.9% 

42. In pneumatic circuits, the full form of FRI: 

(A) Fully Regulated Lubrication 

(B) Filler Regulator Lubricator 

(C) Fitted Regulatory Lubrication 

(D) Filter Regulator Lubricator 

43. Hydraulic fuses protect the circuit from pressure overload by: 

(A) Switching of the pump  

(B) Rupturing the metallic disc and leaking the oil 

(C) Vaporizing the excess oil  

(D) Blocking the flow of oil through it fully 

44. An ammeter is convertible to a voltmeter by: 

(A) Changing the scale 

(B) Putting a large resistance in parallel with actual measuring part of the instrument

(C) Putting a large resistance in series with actual measuring part of the instrument

(D) Simply installing the instrument in parallel with the circuit 

45. The composition of soft solder is: 

(A) Lead 58% and tin 42% 

(B) Lead 50% and tin 50% 

(C) Lead 37% and tin 63% 

(D) Lead 70% and tin 30% 

46. In rolling operation, the difference between initial metal thickness and final metal thickness is  called: 

(A) Camber 

(B) Clearance

(C) Draft 

(D) Allowance 

47. The operation of removing the burr or flash from the forged parts in drop forging is known as: 

(A) Trimming 

(B) Trepanning 

(C) Fettling 

(D) Grinding 

48. According to Kennedy’s theorem, the instantaneous centers of three body having relative motion  lie on a:  

(A) Curve path 

(B) Straight line 

(C) Point 

(D) Circle 

49. The commonly used flux in brazing are: 

(A) Boron carbide 

(B) Ammonium borosilicate 

(C) Sodium chloride 

(D) Sodium tetraborate decahydrate 

50. For a speed ratio of 100, smallest gear box can be obtained by using: 

(A) A pair of spur gears 

(B) A pair of bevels and a pair of spur gears in compound gear train 

(C) A pair of helical and a pair of spur gears in a compound gear train  

(D) A pair of helical and a pair of worm gears in compound gear 

51. The best cam profile which eliminates the shock and vibration at the beginning of stroke is: 

(A) Double harmonic 

(B) Circular arc 

(C) Cyclical 

(D) Straight line 

52. The iron ore mostly used for the production of pig iron is: 

(A) Hematite

(B) Siderite 

(C) Limonite 

(D) Magnetite 

53. Negative slip occurs in reciprocating pumps, when delivery pipe is:  

(A) Long and action pipe is short, and pump is running at slow speed 

(B) Long and suction pipe is short, and pump is running at high speed  

(C) Short and suction pipe is long, and pump is running at slow speed 

(D) Short and stiction pipe is long and pump is running at high speed 

54. The clapper block is used in: 

(A) Milling machine  

(B) Lathe machine 

(C) Drilling machine 

(D) Shaping machine 

55. At break-even point, profit is: 

(A) Maximum  

(B) Zero 

(C) Minimum 

(D) Negative 

56. Medium grain size or grit of grinding wheel is denoted by the numbers ranging from: 

(A) 220-600 

(B) 80-180 

(C) 30-60 

(D) 10-24 

57. If a defective part or equipment malfunction is discovered, the machine automatically stops, and  operators stop work and correct the problem rather than continuing production- it is the principle  of: 

(A) TPM 

(B) 5S 

(C) Kaizen 

(D) Jidoka 

58. In CNC machines, G41-Code stands For:

(A) Cutter compensation-left 

(B) Cutter compensation-right 

(C) Cutter compensation-cancel  

(D) Cutter compensation-double 

59. The ratio of tight and slack side tensions in a V-belt or rope is: 

(A)e^µѲsina 

(B) e^µѲ/cosa 

(C) e^µѲcosa 

(D) e^µѲ/sina 

60. Due to slip, the velocity ratio of a belt drive: 

(A) Increases 

(B) Decreases  

(C) Remain same 

(D) None of these 

61. For maximum power transmission, the velocity of the belt is 

(A) √(T/M) 

(B) √(T/2M) 

(C) √(T/3M) 

(D) √(T/4M) 

62. A Hartnell governor is a: 

(A) Pendulum type governor 

(B) Inertia governor  

(C) Spring loaded governor 

(D) Dead weight governor 

63. In a self-locking brake, the force required to apply the brake is: 

(A) Maximum  

(B) Minimum 

(C) Zero 

(D) All of the above

64. Wood is: 

(A) Homogenous material 

(B) Granular material  

(C) Amorphous material 

(D) Cellular material 

65. Stress concentration in a machine component results from: 

(A) Abrupt changes in the cross-section of the component 

(B) Pressure at points/areas of the component at which the load is applied 

(C) Point-to-point variation in the properties o the material of the component Among the above, the correct statements are: 

(A) A and B 

(B) A and C 

(C) B and C 

(D) A, B and C

66. Boring is a method of: 

(A) Generating a hole 

(B) Enlarging a hole 

(C) Finishing a hole 

(D) Drilling a hole 

67. In a milling machine, the process of removing metal by a cutter which is rotated in the opposite  direction of travel of the work piece, is called: 

(A) Up milling 

(B) Down milling 

(C) Gang milling 

(D) End milling 

68. ABC-analysis is based on: 

(A) Parkinson principle 

(B) Porter’s principle 

(C) Philip Kotler’s principle 

(D) Pareto principle 

69. Who is the founding father of scientific management theory?

(A) Frank Gilbreth, Sr. 

(B) Max Weber 

(C) Frederick Taylor  

(D) Lillian Gilbreth 

70. In a sectional view, the hatch lines are shown in those regions in which: 

(A) The cutting plane passes through the hollow portions  

(B) There is no material present 

(C) Some extra materials have to added 

(D) The cutting plane passes through the solid portions of the object 

71. In CNC machines, M09-Code stands for: 

(A) Coolant on 

(B) Coolant off 

(C) Flood coolant on  

(D) Coolant heat up 

72. Spark gap in EDM process ranges between: 

(A) 0.2-04 micron 

(B) 04-08 micron  

(C) 0.005-0.05 mm 

(D) 0.05-0.5 mm 

73. The polar section modulus of a solid circular shaft of diameter d about an axis through its centre  of gravity is: 

(A)  πd³/8 

(B) πd³/16 

(C) πd³/32 

(D) πd³/64 

74. The strain energy stored in a shaft due to torsion is given by: 

(A) (τ^2) V/G 

(B) (τ^2) V/4G 

(C) (τ^2) V/8G 

(D) (τ^2) V/16G

75. A capillary tube is used in a small refrigerator to serve the purpose of: 

(A) Expansion valve  

(B) Thermostat 

(C) Drier 

(D) Evaporator 

76. If a closed coil helical spring absorbs 30 N mm of energy while extending by 5 mm, its stiffness  is: 

(A) 2 N/mm 

(B) 4 N/mm 

(C) 6 N/mm  

(D) 10 N/mm 

77. The refrigerant commonly used for commercial ice plants is: 

(A) Freon-12 

(B) NH3 

(C) CO2 

(D) Air 

78. LASER stands for- 

(A) Light Amplification by Simulated Erosion of Radiation 

(B) Light Amplification by Stimulated Emission of Radiation 

(C) Light Amsorption by Stimulated Emission of Radiation 

(D) Light Amplification by Stimulated Ejection of Radiation 

79. FMS stands for- 

(A) Flexible Machining Solutions 

(B) Flexible Manufacturing System 

(C) Fundamental Manufacturing System  

(D) Fundamental Machining Solutions 

80. AGV stands for- 

(A) Autonomous Guided Vehicle  

(B) Automated Guided Vehicle 

(C) Autonomous Guided Variable 

(D) Automated Guided Variable

81. Railway lines are welded by- 

(A) Gas welding  

(B) Arc welding  

(C) Resistance welding 

(D) Thermit welding 

View Answer

82. The accuracy of micrometers, calipers and dial indicators can be check by: 

(A) Ring gauge  

(B) Plug gauge 

(C) Slip gauge 

(D) Feeler gauge 

83. A column with highest equivalent length has: 

(A) Both ends fixed  

(B) Both ends hinged or pin-joined 

(C) One end fixed, the other entirely free  

(D) One end fixed, the other hinged 

84. Amongst the following, a higher pair is: 

(A) A ball and socket joint 

(B) Toothed gearing  

(C) Universal joint 

(D) Cycle wheels turning on their axles 

85. The angle of contact at the smallest pulley is taken into consideration while using the tension  T1/T2 = e^µѲ equation because: 

(A) The smaller pulley is weak as compared to the larger pulley  

(B) The smaller pulley is always taken as the driving pulley 

(C) The belt slipping occurs first on the smaller pulley  

(D) The angle of lap on the smaller pulley is smaller than on the larger pulley 

86. A toothed gearing with 30 teeth has a circular pitch of 15 mm. Then the diametral pitch will be  closest to: 

(A) 0.21 mm 

(B) 0.105 mm  

(C) 0.7 mm 

(D) 0.067 mm

87. Change in enthalpy in a closed system is equal to heat transferred, if the reversible process takes  place at constant: 

(A) Temperature 

(B) Internal energy 

(C) Pressure 

(D) Entropy 

88. A body of weight of 10 N is suspended by a string 10 cm long and is held at a point 6 cm from  the vertical line passing through the point of suspension by a horizontal force. The horizontal force  is: 

(A) 7.5N 

(B) 10.2 N 

(C) 16.7N 

(D) 13.6 N 

90. Air is being forced by the bicycle pump into a tyre against a pressure of 4.5 bar. A slow  downward Movement of the piston can be approximated as:  

(A) Isobaric 

(B) Adiabatic process  

(C) Isothermal process 

(D) Throttling process 

91. In a kinematic pair, when the have surface contact while elements in motion it is a: 

(A) Lower pair 

(B) Higher pair 

(C) Closed pair 

(D) Unclosed pair 

92. The cam follower used in automobile engines is: 

(A) Roller 

(B) Flat faced 

(C) Spherical faced

(D) Knife-edged 

93. The point on the cam with the maximum pressure angle is known as the: 

(A) Pitch curve 

(B) Pitch point  

(C) Trace point  

(D) Prime point 

94. The size of gears is usually specified by: 

(A) Circular pitch 

(B) Outside diameter 

(C) Pitch circle diameter 

(D) Inside diameter 

95. The included angle of a pulley for V-belt is: 

(A) 50°-60° 

(B) 30°-40° 

(C) 20°-30° 

(D) 40°-50° 

96. The lead screw of lathe along with half-nut is an example of: 

(A) Rolling pair 

(B) Screw pair 

(C) Turning pair 

(D) Sliding pair 

97. The instantaneous center of a slider moving in a linear guide lies: 

(A) At pinpoint 

(B) At their point of contact 

(C) At infinity 

(D) At the center of curvature 

98. Full form of LVDT is: 

(A) Linear Variable Differential Transducer 

(B) Linear Variable Differential Transformer 

(C) Linear Voltage Differential Transducer

(D) Linear Voltage Differential Transformer 

99. Which of the following is an inversion of single slider crank chain: 

(A) Elliptical trammel 

(B) Hand pump 

(C) Scotch yoke 

(D) Oldham’s coupling 

100. Master patterns generally have: 

(A) Zero shrinkage allowance 

(B) Double shrinkage allowance 

(C) Triple shrinkage allowance  

(D) Negative shrinkage allowance