Mechanical Engineering MCQ for NEC Licence and Lok Sewa: Free Mock Test

Mechanical Engineering MCQ: NEC Licence and Lok Sewa

171 questions with answers. Mock tests, practice by topic and progress tracking.

Chapter

Sub-section

Level

Number of questions

Question navigator:

Free practice by EngineeringNepal.com.np. Questions are written and checked by our team; always confirm the current exam format in the official notice.

Mechanical engineering MCQ: what this set covers

This question bank is for mechanical engineering graduates preparing for the Nepal Engineering Council (NEC) registration exam, Lok Sewa Aayog and provincial Public Service Commission mechanical engineer posts, and the written technical tests that public bodies and industries set when hiring mechanical engineers. The same core subjects appear in all of these papers.

Every question has four options, a marked answer and a short explanation. Numerical questions show the working step by step, so you can see where a wrong option comes from. The questions are written and checked by our team; where a question is based on a past exam topic, it has been reworded rather than copied. Exam formats change, so always confirm the pattern in the official notice for your exam.

How the NEC mechanical licence exam works

The NEC syllabus for mechanical engineering (AMeE) has 10 chapters, each split into 6 sub-sections, giving 60 sub-sections in total. Chapter 10, Project planning, design and implementation, is common to all engineering branches. NEC's model question sets published in November 2025 contain 100 one-mark questions. Exams up to 2023 used 60 one-mark and 20 two-mark questions in 2 hours, with a pass mark of 50 percent. Always confirm the pattern in the notice for your session.

The NEC mock on this page is a timed two-hour paper that draws questions from every sub-section of all ten chapters, so no part of the syllabus is skipped. The Lok Sewa set is 50 questions with 20 percent negative marking. For the full chapter list, read our NEC mechanical engineering syllabus (AMeE) post.

Chapters in this question bank

Basic mechanical engineering concepts - engineering drawing, materials and material science, basic electrical, workshop practice and organisation management.
Engineering thermodynamics - laws of thermodynamics, power and refrigeration cycles, IC engines, HVAC, boilers, compressors and psychrometrics.
Fluid mechanics and machines - fluid statics, kinematics, Bernoulli and momentum equations, pipe flow, turbines and pumps.
Engineering mechanics and strength of materials - statics, elasticity, beams, torsion, theory of machines, mechanisms and thin and thick cylinders.
Manufacturing technology - casting, heat treatment, metal working, machine tools, welding, CAD/CAM and CNC.
Mechanical design - standards, gears, bearings, springs, shafts, failure theories, fasteners, vibrations and design methods.
Repair and maintenance - maintenance strategies, safety, coatings, reliability, risk and non-destructive testing.
Industrial engineering and automation - metrology, sensors and actuators, production systems, inventory and EOQ, and engine testing.
Heat transfer, energy resources and environment - conduction, convection, radiation, heat exchangers, micro-hydro, solar, biogas, combustion, fuels and pollution control.
Project planning, design and implementation - the common chapter. Practise it in our engineering economics, planning and professional practice MCQ section; the mock pulls chapter 10 questions from there.

How to use this page

Mock tests - sit a full NEC-style timed paper or the 50-question Lok Sewa set with negative marking, then review every answer with its explanation.
Practice by topic - pick a chapter or sub-section and work through it at your own pace. This is the best way to fix a weak area.
My progress - see your scores and which topics need more work. Progress is saved in this browser only, so use the same browser and device to keep your history.

The bank grows regularly, and new questions appear here automatically.

Study tips for mechanical engineers

Spend most numerical practice on chapters 2, 3, 4 and 9. Thermodynamics, fluid mechanics, strength of materials and heat transfer produce the most calculation questions. Chapters 1, 5 and 7 are mostly concept and definition questions that you can answer quickly.
Know the core thermodynamics results by heart. Carnot efficiency is 1 - TL/TH with temperatures in kelvin; Otto efficiency is 1 - 1/r^(gamma - 1); refrigerator COP is QL/W and heat pump COP is QH/W, so COP(HP) = COP(R) + 1.
Memorise the standard strength of materials formulas. Bending stress = My/I, torsion shear stress = Tr/J with J = pi d^4/32 for a solid shaft, central-load deflection of a simply supported beam = WL^3/48EI, uniform-load deflection = 5wL^4/384EI, and Euler buckling load = pi^2 EI/Le^2 with the correct effective length for the end conditions.
For fluids, link each formula to its use. Continuity (Q = AV), Bernoulli along a streamline, Darcy head loss hf = fLV^2/2gD, and pump and turbine specific speed. Know which turbine suits which head: Pelton for high head, Francis for medium head and Kaplan for low head.
Keep short industrial engineering formulas ready. EOQ = sqrt(2DS/H), and in metrology know the difference between accuracy, precision and resolution. These are quick marks.
Manage time and negative marking. In a 2-hour NEC paper, answer all theory questions on the first pass and return to long numericals later. In the Lok Sewa set, each wrong answer costs 20 percent of that question's marks. A blind guess among four options still has a small positive expected score, and ruling out even one option makes guessing clearly worthwhile.

Common mistakes in the mechanical paper

Using degrees Celsius instead of kelvin in Carnot efficiency or radiation (Stefan-Boltzmann, sigma T^4) problems. Wrong options are often built on exactly this slip.
Mixing gauge and absolute pressure in thermodynamic and pump suction problems.
Using diameter where radius is needed (or the reverse) in torsion, and using I instead of J for shafts.
Forgetting to convert rpm to rad/s (omega = 2 pi N/60) when calculating power from torque, or mixing W and kW.
Confusing similar terms: hardness versus toughness, annealing versus normalising, preventive versus predictive maintenance.

Frequently asked questions

How many questions does the mechanical bank have?

The bank starts with about 170 questions and grows every week.

Does it follow the latest NEC syllabus?

Yes. Questions are tagged to the chapters and sub-sections of the current NEC AMeE syllabus, and the mock draws from every sub-section.

Is it free?

Yes. All mock tests and topic practice are free, with no sign-up needed.

How does it relate to the other branch pages?

Chapter 10 is shared with every branch, so the same project planning, economics and professional practice questions serve civil, electrical, computer, electronics and mechanical candidates. Chapters 1 to 9 are specific to mechanical engineering.