KMC Mechanical SAE Previous Year 2023 Question Papers with Answers

The Kolkata Municipal Corporation (KMC) conducts recruitment exams for the position of Sub Assistant Engineer (SAE) in the mechanical discipline. West Bengal Municipal Service Commission(WBMSC) has conducted exam for recruitment to the post of Sub-Assistant Engineer Mechanical under the Kolkata Municipal Corporation (KMC) to serve 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 KMC Mechanical SAE Previous Year 2022 Question Papers with Answers.

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. Following WBMSC/ KMC Mechanical exam paper held on 25/06/2023.

 N.B- All questions are taken from KMC exam’s original question paper i.e. memory based 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.

KMC SAE MECHANICAL (2023) QUESTION PAPER

1. In a flat belt drive, the slip between the driver and the belt is 1% and that between the belt and follower is 3%. If the pulley diameters for the driver and the follower are equal, then velocity ratio of the driver is:

2. Which key is used to obtain properties palette in Auto CAD?

3. The ratio of relative velocity of steam to the moving blade at exit to the relative velocity of steam to the moving at entrance is called:

A. factor of reduction

B. reduction co-efficient

C. friction loss

D. blade velocity co-efficient

4. Stoichiometric Air-fuel ratio in a petrol engine is:

A. 9:1

B. 4:1

C. 8:1

D. 15:1

5. Kutzback criterion for the degrees of freedom (F) of plain mechanism is given as:

A. F=4(N-1)-2P₁-P₂

B. F=2(N-1)-3P₁-P₂

C. F=3(N-1)-3P₁-P₂

D. F=3(N-1)-2P₁-P₂

Where, N=total number f links in the mechanism, P₁=number of lower pairs, P₂=number of higher pairs

6. The capacity of a strained body for doing work on the removal of the straining force, is called:

A. Impact energy

B. Strain energy

C. Proof resilience

D. Resilience

7. Which is used for general purpose grinding of tough materials?

A. Green silicon carbide

B. brown aluminium oxide

C. zinc chloride

D. silicate

8. The management function that is concerned with filling and keeping filled positions in the organization structure is known as:

A. Recruiting

B. filling

C. staffing

D. campusing

9. In a cold chamber die casting machine:

A. low temperature and pressure is used

B. melting pot is separate from the machine

C. melting pot may have any location

D. melting pot is an integral part of the machine

10. Out of the following statements regarding boiler mounting, the correct one is:

A. Water level indicator is not a boiler mounting

B. They ensure safe operation of the boiler

C. Economizer, super heater and feed pumps are boiler mountings

D. they are installed to increase efficiency of the boiler

11. Dynamic viscosity of most of the liquids with rise in temperature:

A. none of these

B. increase

C. remains unaffected

D. decreases

12. A universal joint is example of:

A. sliding pair

B. higher pair

C. rolling pair

D. lower pair

13. The specific volume of a liquid is the reciprocal of:

A. Specific volume

B. weight density

C. specific density

D. mass density

14. The torsional rigidity of a shaft is expressed by the:

A. elastic limit up to which it resists torsion, shear and bending stresses

B. Torque required to produce a twist of one radian per unit length of shaft

C. number of cycle it undergoes before failure

D. maximum torque it can transmit

15. In an impulse turbine, the axial force on the blades is zero if:

A. the flow and whirl component of inlet velocity are equal

B. the whirl components of the initial and outlet absolute velocities are equal

C. The exit velocity of steam is axial

D. The flow components of the inlet and outlet absolute velocities are equal

16. The syphon tube in the Burdon pressure gauge(single tube) is filled with:

A. condensed water

B. mercury

C. mineral water

D. turpentine oil

17. What is Go limit?

A. upper limit of shaft and hole

B. Lower limit of shaft and upper limit of hole

C. upper limit of shaft and lower limit of a hole

D. lower limit of shaft and hole

18. Governor sensitivity is the ratio of:

A. Range of speed to the mean speed

B. maximum speed to the minimum speed

C. governor lift to the range of speed

D. mean speed to the range of speed

10. When two links of a pair are in contact either due to force of gravity or some spring action, they constitute

A. Coupled pair

B. closed pair

C. disclosed pair

D. unclosed pair

20. A moving mandrel is used in:

A. punching

B. wire drawing

C. casting

D. tube drawing

21. ABC analysis deals with

A. controlling inventory costs money

B. analysis of process chart

C. ordering schedule of jobs

D. flow of materials

22. Oldham coupling is an inversion of:

A. crossed slider crank chain

B. four bar chain

C. double slider crank chain

D. single slider crank chain

23. Isothermal annealing is mainly used in alloy steels to improve:

A. weld ability

B. machinability

C. ductility

D. toughness

24. When a closely-coiled helical spring of mean diameter(A) is subjected to an axial load(W), the stiffness of the spring is given by(all other symbols) are bearing their usual meaning:

A. Gd⁴/8D³n

B. Gd⁴/D³n

C. Gd⁴/4D³n

D. Gd⁴/2D³n

25. The material which can be best cut with oxygen cutting process is:

A. aluminium

B. mild steel

C. copper

D. brass

26. The arms of the pulleys for flat belt drive have:

A. all the three characteristics

B. elliptical cross-section

C. major axis twice the minor axis

D. major axis in plane of rotation

27. Ina functional organisation

A. all of these

B. quality of work is better

C. specialized training is provided to individual worker

D. wastage of material is minimum

28. A steel bar of 5mm length is heated from 15 degree C to 40 degree C and it is free to expand. The bar will induce:

A. compressive stress

B. no stress

C. tensile stres

D. shear stress

29. The condition for dynamic balancing of a shaft rotor system is:

A. ΣM+ΣF=0

B. ΣM=0 and ΣF=0

C. ΣF=0

D. ΣM=0

30. The relative velocity of B with respect to A in a rigid link AB IS:

A. at 45 degree to AB

B. parallel to AB

C. along AB

D. perpendicular to AB

31. Ignition quality of diesel engine oil fuel is indicated by:

A. none of these

B. cetane number

C. octane number

D. pre-ignition

32. The disadvantage of the magneto ignition system is that it:

A. is used largely in four wheels

B. has a poor quality of spark during starting

C. has more maintenance problems

D. occupies more space

33. What is the range of bevel protactor?

A. 90-270 degree

B. 0-90 degree

C. 0-360 degree

D. 0-180 degree

View Answer

34. Which of the following parts is used for holding the metal sheet during blanking operation?

A. spherical steel ball

B. roller

C. pressure pad

D. magnet

35. What is powder sintering process?

A. none of these

B. cold treatment used to improve a material’s strength and structural integrity

C. thermal treatment used to improve a material’s strength and structural integrity

D. metal freezes to improve its strength and structural integrity

36. Mach number is the ratio of:

A. speed of sound in vacuum/speed of a body

B. speed of a body/speed of sound in same medium

C. speed of a body/speed of sound in vacuum

D. speed of sound in a medium/speed of a body

37. The refrigeration for a refrigerator should have:

A. low latent heat

B. high latent heat

C. low sensible heat

D. high sensible heat

38. Bin cards are used in:

A. administrative wing

B. stores

C. foundry shop

D. workshop

39. Bernoulli’s theorem deals with the conservation of:

A. energy

B. mass

C. momentum

D. force

40. The CG of a semi circular plate of 66cm diameter, from its base is:

A. 63/8 cm

B. 14cm

C. 1/14cm

D. 8/33cm

41. Longitudinal vibrations are said to occur when the particles of a body moves:

A. none of these

B. perpendicular to its axis

C. in a circle about its axis

D. parallel to its axis

42. The parameter which doesn’t affect frictional force between two bodies in contact is:

A. force tending cause motion

B. surface roughness

C. area of contact

D. reaction of surface

43. Gas turbine cycle with regenerators:

A. none of these

B. improves thermal efficiency

C. avoids pollution

D. increase work ratio

44. Green sand is mixture of:

A. 90% of sand and 10% of clay

B. 60% of sand and 40% of clay

C. 70% of sand and 30% of clay

D. 50% of sand and 50% of clay

45. The distance measured along the circumference of the pitch circle from a point on one tooth to the same point on the adjacent tooth is called:

A. pitch point

B. circular pitch

C. pitch diameter

D. Line of cemters

46. If a condenser and evaporator temperatures are 312K and 273K respectively, then reverse carnot C.O.P. is:

A. 1/8

B. 1/5

C. 1/7

D. 1/6

47. Transverse fillet welded joints are designed for:

A. bending strength

B. tensile strength

C. shear strength

D. compressive strength

48. In MLTѲ system the dimension of thermal conductivity is:

A. MLT^-2Θ^-1

B. ML^-1T^-1Θ^-3

C. MLT^-3Θ^-1

D. MLT^-1Θ^-3

49. On the motors with low starting torque, the type of clutch to be used is:

A. single plate clutch with both sides effective

B. multiple plate clutch

C. centrifugal clutch

D. cone clutch

50. For a shaft subjected to a torque(T) and bending moment (M), the equivalent twisting moment is:

A. √(M² + T²)

B. √(T² + M²)/2

C. √(T² + M)

D. √(M² – T²)

51. Standard taper generally used in milling machine is:

A. brown and sharp taper

B. morse taper

C. metric taper

D. jarno taper

52. Out of the following the method which is not used to reduce stress concentration is:

A. usage of sharp concerns

B. usage of additional notches and holes

C. usage of additional discontinuties

D. usage of fillet radius

53. The order of activities involved in appointing human resource in an organization is:

A. recruitment-selection-placement-induction

B. slection-recruitment-induction-placement

C. Placement-induction-recruitment-selection

D. recruitmet-induction-placement-slection

54. Which type of lever is used in Hartnell governor?

A. rocker arm

B. hand lever

C. bell crank lever

D. foot lever

55. The size of cam depend on:

A. pitch curve

B. base circle

C. prime circle

D. pitch circle

56. Pelton turbine works on:

A. low head low discharge

B. high head low discharge

C. high head high doscharge

D. low head high discharge

57. The velocity of entrance and exit through a nozzle remains the same. It is possible:

A. only if the flow is rotational

B. only if the flow is laminar

C. never porssible

D. only is the flow is compressible

58. AN engine that works on Brayton cycle is:

A. Petrol engine

B. stream engine

C. diesel engine

D. jet engine

59. The gas used in modern shock absorbers is:

A. carbon dioxide

B. nitrogen

C. hydrogen

D. oxygen

60. For a ductile material, toughness is a measure of:

A. resistance of indentation

B. resistance of scratching

C. ability to absorb energy till elastic limit

D. ability to absorb energy up to fracture

61. In an experiment, the bulk modulus of elasticity of a material is twice its modulus of rigidity. The poisson’s ratio of the material is:

A. 4/7

B. 1/7

C. 3/7

D. 2/7

62. Governing of steam turbine is done using

A. all of these

B. throttle governor

C. by-pass

D. nozzle control

63. When system undergoes a process such that ʃdQ/T=0 and ΔS>0 , the process is:

A. isobaric

B. irreversible, adiabatic

C. isothermal

D. reversible, adiabatic

64. Which gauge used for measurement of piston ring gap:

A. vacuum gauge

B. straight edge

C. compression gauge

d. feeler gauge

65. The iron carbon diagram and the TTT curves are determined under:

A. non equilibrium conditions for both

B. equilibrium and non-equilibrium conditions respectively

C. equilibrium conditions for both

D. non-equilibrium and equilibrium conditions respectively

66. How many forces are acting during orthogonal cutting action?

A. four

B. one

C. three

D. two

67. The knocking tendency in spark engine may be decreased by:

A. increasing inlet temperature

B. increasing swept volume

C. decreasing inlet pressure

D. decreasing compression ratio

68. Which of the following is not true about first order irregularities?

A. may arise due to deformation of work under action

B. arising due to irregularities in machine tool itself

C. arise due to vibrations

D. arising due to weight of material itself

69. How does the Vicker’s hardness test differ from Brinell’s?

A. duration of indentation

B. type of indenter

c. load applied

D. materials to be tested

70. In a cam drive, it is essential to off-set the axis of follower to:

A. reduce the cost

B. decrease the side thrust between the follower and guide

C. take care of space limitation

D. decrease the wear between the follower and cam surfcae

71. The discharge through rectangular orifice 2.2m wide and 1.3m deep fitted to a tank, when the water level in the tank is 2.5m above the top edge of orifice, will be

A. 13.9 m^3/s

B. 8.7 m^3/s

C. 16.9 m^3/s

D. 11.5 m^3/s

72. The stress range below which there is no crack growth and the material presents an infinite life under cycle loading is called:

A. stress concentration

B. shear strength

C. yield strength

D. endurance limit

73. A bucket of water weighing 10kgs is pulled up from a well 20 meter deep by a rope weighing 1kg/m length, then the work done is:

A. 800kg-m

B. 200kg-m

C. 600kg-m

D. 400kg-m

74. The value of the diagram factor is:

A. all of these

B. one

C. greater than one

D. less than one

75. Cutting a sheet metal through a part of its length and then bending the cut portion is termed as:

A. angle bending

B. slitting

C. lancing

D. bending

76. The diameter (in mm) of a water droplet, when the inside pressure is 0.05N/cm^2 greater than the outside pressure (take surface tension as 0.075N/m) will be:

A. 6

B. 3

C. 0.6

D. 0.3

77. The pressure angle of a cam depends upon

A. all of these

B. offset between center lines of cam and follower

C. angle of ascent

D. lift of follower

78. If the intake air temperature of I.C. engine increases, then its efficiency willL

A. first decrease then increase

B. increase

C. remain same

D. decrease

79. What is the maximum pressure, which can be applied in a pressure die casting?

A. 5100 kg/cm²

B. 4530 kg/cm²

C. 5000 kg/cm²

D. 4980 kg/cm²

80. The 14 principles of management are propounded by:

A. Elton mayo

B. F W taylor

C. Abraham Maslow

D. Henri Fayol

81. After the commencement of Indian factories act. 1948; overcrowding in the workplace is said to have occurred if the space provided for each workman falls below:

A. 14.8 m³

B. 9.9 m³

C. 14.2 m³

D. 12.2 m³

82. Working principle of dead wright pressure gauge tester is based on:

A. avogadro’s law

B. pascal’s law

C. dalton’s law of partial pressure

D. newton’s law of viscosity

83. Intercooler_____ the power developed by the engine

A. first increases then decreses

B. increases

C. remains constant

D. decreases

84. A liquid flows with the same velocity through two pipes 1 and 2 having the same diameter. If the length of the second pipe be twice that of the first pipe, then the ratio of the head loss in the two pipes is:

A. 4:1

B. 1:2

C. 1:4

D. 2:1

85. Alloys of which of the following metals is used for hot chamber die casting?

A. iron

B. tin

C. zinc

D. lead

86. Which of the following is independent of sales forecast?

A. production control

B. productivity

C. production planning

D. inventory control

87. Supercharging is essential in

A. aircraft engine

B. diesel engine

C. gas turbine

D. petrol engine

88. To find the true shape of the section, it must be projected on a plane parallel to the:

A. section plane

B. profile plane

C. auxiliary plane

D. vertical plane

89. The bending moment at the fixed end of a cantilever beam of length ‘l’ and carrying a uniformly distributed load of ‘w per unit length is:

A. wl/2

B. wl/4

C. wl²/2

D. wl

90. Out of the following pair of concurrent forces which cannot have a resultant of 4N will be:

A. 2N and 8N

B. 2N and 2N

C. 2N and 6N

C. 2N and 4N

91. A mechanism forms a structure when the number of degrees of freedom is equal to:

A. 2

B. 0

C. -1

D. 1

92. In a bilateral system of tolerance, the tolerance is allowed on:

A. both sides of the nominal size

B. one side of the actual size

C. both sides of the actual size

D. one side of the nominal size

Answer: C

93. A kinematic chain is known as mechanism when:

A. none of these

B. none of the links is fixed

C. two of the links are fixed

D. one of the links is fixed

94. Which of the following instruments is widely used to check and calibrate geometric features of machine tools during their assembly?

A. vernier calipers

B. ultrasonic porbe

C. laser interferometer

D. coordinate measuring machine

95. The artificial draught in boiler normally designed to produce

A. all of these

B. less smoke

C. less chimney gas temperature

D. more draught

96. 96. The bending equation is (symbols are bearing their usual meaning)

A. T/J = τ/R = GѲ/l

B. M/R = T/J = GѲ/l

C. T/l = τ/J = R/GѲ

D. σ/y = E/R = M/l

97. Which of the following substances is added to iron powder to improve the compressive strength of bearing?

A. Bismuth

B. Lead

C. sulphur

D. copper

98. Compounding of steam turbine is required to:

A. none of these

B. increase rotor speed

C. no effect on rotor speed

D. decrease rotor speed

99. For the same maximum pressure and tempreature:

A. dual cycle is less efficient than Otto and diesel cycle

B. Otto cycle is more efficient than diesel cycle

C. Dual cycle is more efficient than Otto and diesel cycle

D. diesel cycle is more efficient than Otto cycle

100. Penstock is a part of which power plant?

A. solar

B. nuclear

C. thermal

D. hydroelectric