RRB ALP Engineering Questions, Check Mechanical Topics

Published on 9 October 2025 by
RRB ALP Engineering Questions

RRB ALP Engineering Questions: Mechanical Engineering is a vital part of the RRB ALP syllabus, especially for the Technician and ALP posts. Scoring well in this section can significantly boost your overall rank, as questions are often concept-based and application-oriented. This article compiles important Mechanical Engineering questions, topic-wise distribution, and strategic preparation tips for RRB ALP 2025 aspirants.

Why Mechanical Engineering Matters for RRB ALP?

The mechanical engineering subject in RRB ALP Syllabus matters for the examination as it has weightage of marks. Candidates must cover every topic to secure good marks in the engineering topics.

Topic-Wise Breakdown of Mechanical Engineering Questions

In the table below, we have provided the topic wise breakdown of RRB ALP Engineering Questions in the mechanical section. Check out the details below:

TopicApprox. Weightage (%)Key AreasExample Question Types
Thermodynamics15–20Laws of thermodynamics, heat engines, cycles, properties of gasesNumerical problems, concept-based MCQs
Strength of Materials10–15Stress, strain, bending moment, torsion, columnsCalculation-based, theory application
Fluid Mechanics & Hydraulics10–12Fluid properties, Bernoulli’s equation, flow through pipes, pumpsNumerical, diagram interpretation
Manufacturing & Workshop10–12Casting, welding, machining processes, CNC basicsConceptual, process sequence, equipment identification
Engineering Mechanics8–10Force systems, equilibrium, friction, momentsProblem-solving, numerical questions
Theory of Machines8–10Gears, cams, flywheels, balancingFormula application, diagram-based MCQs
Refrigeration & Air Conditioning5–8Refrigerants, COP, simple cycle problemsConceptual and numerical
Material Science & Metallurgy5–8Material properties, heat treatment, alloysDirect theory, application-based
Electrical & Electronics Basics (Mechanical Integration)2–5Motors, transformers, basic circuitsConceptual understanding for integrated systems
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RRB ALP Mechanician Engineering Questions

A set of 100 important RRB ALP Mechanical Engineering Questions and Answers are tabulated below. Candidates can have a look to get an idea about the difficulty level:

QuestionAnswer
1. The efficiency of a Carnot engine depends on?Temperature of the source and sink
2. In an ideal Otto cycle with compression ratio 8, efficiency is closest to?50%
3. First law of thermodynamics is a statement of?Conservation of energy
4. Which of the following is a reversible process?Isothermal compression of gas
5. The coefficient of performance (COP) of a refrigerator increases when?Temperature of the sink decreases
6. Work done during an isothermal process of an ideal gas is?nRT ln(Vf/Vi)
7. Which cycle is used in steam power plants?Rankine cycle
8. Enthalpy is defined as?U + PV
9. Property constant during an adiabatic process of an ideal gas?Entropy
10. In a Diesel engine, ignition occurs due to?Compression of air
11. Triple point of water occurs at?0.01°C and 0.006 atm
12. Which of the following is a heat engine?Steam turbine
13. Adiabatic process equation for ideal gas?PV^γ = constant
14. Entropy is a measure of?Disorder
15. Working fluid in ideal Brayton cycle?Air
16. Young’s modulus is the ratio of?Stress/Strain
17. Maximum shear stress occurs at?Outer surface of a circular shaft under torsion
18. Bending stress in a beam is maximum at?Top and bottom fibers
19. Euler’s formula is used for?Long slender columns
20. Torsional rigidity of circular shaft?GJ/L
21. Maximum bending moment in simply supported beam with uniform load occurs at?Mid-span
22. Poisson’s ratio is?Lateral strain / Longitudinal strain
23. Factor of safety is defined as?Ultimate stress / Working stress
24. Shear force at support of simply supported beam with point load at midspan?W/2
25. Moment of inertia of circular section about neutral axis?πd^4/64
26. Torsion in a solid shaft produces?Shear stress
27. Slope of stress-strain curve in elastic region gives?Young’s modulus
28. Maximum bending moment for cantilever beam with point load at free end?At support
29. Unit of stress in SI system?N/m²
30. Material used for high-strength torsion shafts?Alloy steel
31. Bernoulli’s equation assumes?Incompressible and frictionless flow
32. Unit of kinematic viscosity?m²/s
33. Reynolds number determines?Laminar or turbulent flow
34. Pitot tube measures?Flow velocity / Dynamic pressure
35. Hydraulic efficiency of turbine is?Output power / Input power
36. Flow through pipe is laminar if Re < ?2000
37. Manometer is used to measure?Pressure
38. Cavitation in pump occurs due to?Low suction pressure
39. Bernoulli’s principle is based on?Conservation of energy
40. In venturimeter, flow rate is calculated from?Differential pressure
41. Hydraulic gradient line lies?Below pressure line
42. Pump preferred for high head and low discharge?Reciprocating pump
43. Darcy-Weisbach equation calculates?Head loss due to friction
44. Moody chart is used to find?Friction factor
45. Discharge from circular pipe under laminar flow is proportional to?Fourth power of radius
46. Casting is used when?Complex shapes required
47. Welding is mainly used to join?Metals
48. CNC stands for?Computer Numeric Control
49. Process of removing material by abrasive action is?Grinding
50. EDM is based on?Electrical discharge
51. Annealing process is used to?Relieve internal stresses
52. Welding process using consumable electrode?MIG welding
53. Gear cutting is usually performed on?Milling machine
54. Forging is primarily done to?Increase toughness
55. Fastest material removal process?Milling (or Grinding depending on context)
56. Hardness of a metal is measured using?Brinell and Rockwell test
57. Surface finish of casting improved by?Grinding and Sanding
58. Process joining metals without melting?Brazing
59. Machining allowance is provided to?Achieve required dimensions after finishing
60. EDM is suitable for which materials?Electrically conductive
61. Velocity ratio of simple gear pair depends on?Number of teeth
62. Cam converts?Rotary motion to reciprocating motion
63. Flywheel is used to?Reduce torque fluctuation
64. In belt drive, velocity ratio depends on?Diameter of pulleys
65. In chain drive, sprocket pitch affects?Center distance and speed ratio
66. In four-bar mechanism, crank rotates fully if?Grashof condition satisfied
67. Torque on a rotating shaft due to power is?Power/Angular velocity
68. Balancing of rotating masses reduces?Vibration
69. Spur gear efficiency depends on?Tooth friction and backlash
70. Single plate clutch transmits torque by?Friction
71. Force in belt drive is maximum at?Tight side
72. Helical gears are preferred over spur gears because?Smoother operation
73. Gear train ratio is product of?Individual gear ratios
74. Flywheel energy stored depends on?Mass and radius of gyration
75. Cam follower types include?Roller, knife edge, flat face
76. In simple lifting machine, mechanical advantage = ?Load/effort
77. Friction in screw jack is reduced by?Using collar bearing
78. Belt tension ratio T1/T2 = ?e^(μθ)
79. Pitch circle diameter of gear is?Diameter of circle passing through gear teeth pitch points
80. Dead weight of flywheel is proportional to?Square of speed fluctuation
81. Force in a truss member is calculated using?Method of joints
82. Centrifugal force on rotating mass = ?mω²r
83. Static equilibrium equations?ΣFx=0, ΣFy=0, ΣM=0
84. Moment of inertia of rectangular section about neutral axis?bh³/12
85. Thrust on inclined plane due to friction = ?μN cosθ + N sinθ
86. Velocity of simple harmonic motion = ?ω√(A² – x²)
87. Strain energy stored in linear elastic member = ?σ²/2E × Volume
88. Maximum bending stress formula?My/I
89. Stress in circular shaft under torsion?Tρ/J
90. For uniform beam under uniform load, maximum bending moment?wL²/8
91. Brinell hardness test uses?Steel/Hard alloy ball
92. Rockwell hardness test uses?Steel/diamond cone or ball
93. Heat treatment to increase hardness?Quenching
94. Heat treatment to reduce hardness and internal stress?Annealing
95. Cold working of metals increases?Strength and hardness
96. Recrystallization temperature depends on?Amount of cold work
97. Refrigeration COP = ?QL / W
98. Compression refrigeration cycle working fluid?Refrigerant (like R-134a)
99. Air conditioning system controls?Temperature, humidity, ventilation
100. Electrical basics for mechanical systems: Power = ?Voltage × Current

Preparation Strategy for RRB ALP Mechanical Engineering Questions

We have given below some preparation strategies to face RRB ALP Mechanical Engineering Questions. Check out the details below:

  1. Concept First, Formula Second: Understand the derivation of key formulas rather than rote memorization.
  2. Practice Previous Year Questions: RRB ALP often repeats numerical patterns and conceptual questions.
  3. Short Notes & Formula Sheets: Maintain a compact reference sheet for thermodynamics, mechanics, and manufacturing processes.
  4. Mock Tests & Timed Practice: Simulate exam conditions to improve speed and accuracy.
  5. High-Yield Topic Focus: Thermodynamics, Strength of Materials, and Fluid Mechanics are repeatedly asked; allocate extra time to these areas.
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Key Points of RRB ALP Engineering Questions

The key points of RRB ALP Engineering Questions are summarized below in the table:

Key PointsActionable Advice
High-weightage topicsFocus on Thermodynamics, Strength of Materials, and Fluid Mechanics first.
Formula masteryKeep a dedicated formula sheet for quick revision.
Previous year patternsSolve at least last 5 years’ RRB ALP mechanical questions.
Numerical practiceRegularly practice calculations under timed conditions.
Mock test analysisIdentify weak areas and revise concepts before reattempting.

Mechanical Engineering forms a crucial pillar of RRB ALP Engineering Questions. Understanding topic-wise weightage, practicing previous year questions, and focusing on high-yield areas ensure efficient preparation. With systematic study, mock tests, and targeted revision, aspirants can maximize marks in the technical section while maintaining confidence and speed during the exam.

FAQs

Q.1 Which Mechanical Engineering topics carry the highest weightage in RRB ALP?

The most important topics are Thermodynamics, Strength of Materials, and Fluid Mechanics, together accounting for nearly 40–45% of the technical section. Prioritising these can boost your overall score.

Q.2 How should I prepare numerical questions in Mechanical Engineering for RRB ALP?

Practice is key. Focus on formulas, derivations, and previous year numerical patterns. Use timed mock tests to improve speed and accuracy. Making a formula sheet helps in quick revision.

Q.3 Are conceptual questions asked in the Mechanical Engineering section?

Yes. Many questions test conceptual understanding of Thermodynamics, Manufacturing processes, Material Science, and Theory of Machines, often in combination with practical problem-solving.

Q.4 How many previous year papers should I solve to get an idea of question patterns?

Solving at least the last 5–7 years of RRB ALP Mechanical Engineering questions is recommended. This helps identify frequently asked topics and recurring numerical problems.

Q.5 How can I balance Mechanical Engineering preparation with other technical subjects?

Allocate time based on weightage and difficulty. Spend more time on high-weightage topics (Thermodynamics, Strength of Materials) while maintaining daily practice for low-weightage areas like Material Science and Manufacturing. Incorporate mock tests to cover all topics efficiently.