100+ Free AMIE Section B Mechanical Practice Questions

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Sample AMIE Section B Mechanical Practice Questions

Try these sample questions to test your AMIE Section B Mechanical exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1For an ideal gas undergoing a reversible isothermal process, which of the following statements is correct?

A.The change in internal energy is zero and heat added equals work done

B.The heat added is zero and work done equals the change in internal energy

C.Both heat and work are zero

D.The entropy of the gas remains constant

Explanation: For an ideal gas, internal energy is a function of temperature only. In an isothermal process temperature is constant, so dU = 0, and the first law gives Q = W. The gas absorbs heat and converts all of it into work.

2The thermal efficiency of a Carnot engine operating between a source at 800 K and a sink at 300 K is approximately:

A.37.5%

B.62.5%

C.75.0%

D.50.0%

Explanation: Carnot efficiency = 1 - T_low/T_high = 1 - 300/800 = 1 - 0.375 = 0.625, or 62.5%. Temperatures must be in absolute (Kelvin) units for this formula.

3Which statement correctly expresses the Kelvin-Planck statement of the second law of thermodynamics?

A.Heat cannot flow from a colder to a hotter body without external work

B.It is impossible to construct an engine working in a cycle that produces no effect other than extracting heat from a single reservoir and converting it entirely to work

C.The entropy of an isolated system always decreases

D.Energy can neither be created nor destroyed

Explanation: The Kelvin-Planck statement says no cyclic device can convert heat from a single thermal reservoir completely into work; some heat must always be rejected to a lower-temperature sink. This sets the upper limit on heat-engine efficiency.

4In an air-standard Otto cycle with a compression ratio of 8 and ratio of specific heats gamma = 1.4, the air-standard efficiency is approximately:

A.47%

B.56%

C.65%

D.75%

Explanation: Otto cycle efficiency = 1 - 1/r^(gamma-1) = 1 - 1/8^0.4. Since 8^0.4 is about 2.297, efficiency = 1 - 0.435 = 0.565, roughly 56%.

5The property of a system that remains constant during a reversible adiabatic process is:

A.Temperature

B.Pressure

C.Entropy

D.Enthalpy

Explanation: A reversible adiabatic process has no heat transfer (dQ = 0) and is reversible, so dS = dQ/T = 0. Therefore entropy stays constant; such a process is called isentropic.

6The dryness fraction of wet steam is defined as the ratio of:

A.Mass of dry saturated vapour to total mass of the wet mixture

B.Mass of liquid water to total mass of the wet mixture

C.Volume of vapour to total volume of the mixture

D.Enthalpy of vapour to enthalpy of the liquid

Explanation: Dryness fraction x = mass of dry vapour / (mass of vapour + mass of liquid). It indicates the quality of wet steam; x = 1 means dry saturated steam and x = 0 means saturated liquid.

7For a closed system undergoing a process from state 1 to state 2, the first law of thermodynamics is best written as:

A.Q - W = U2 - U1

B.Q + W = U2 - U1

C.Q - W = H2 - H1

D.Q = W for all processes

Explanation: For a closed (non-flow) system, the first law states Q - W = dU, where Q is heat added to the system and W is work done by the system. The difference equals the change in internal energy.

8In a Rankine cycle, the component in which heat is rejected to the surroundings at constant pressure is the:

A.Boiler

B.Turbine

C.Condenser

D.Feed pump

Explanation: In the Rankine cycle the condenser rejects heat at constant (low) pressure, converting the low-pressure exhaust steam back into liquid water before it is pumped to the boiler.

9The coefficient of performance (COP) of a refrigerator and the COP of a heat pump operating between the same two reservoirs are related by:

A.COP_heat-pump = COP_refrigerator

B.COP_heat-pump = COP_refrigerator + 1

C.COP_heat-pump = COP_refrigerator - 1

D.COP_heat-pump = 1 / COP_refrigerator

Explanation: Because the heat rejected to the hot reservoir equals heat absorbed plus work input, COP_HP = Q_H/W = (Q_L + W)/W = Q_L/W + 1 = COP_ref + 1. The heat pump COP is always one greater than the refrigerator COP.

10The characteristic gas constant R for a particular gas is related to the universal gas constant R_u and molar mass M by:

A.R = R_u * M

B.R = R_u / M

C.R = M / R_u

D.R = R_u + M

Explanation: The specific (characteristic) gas constant equals the universal gas constant divided by the molar mass: R = R_u/M. For air, R_u = 8.314 kJ/kmol-K and M = 28.97 kg/kmol give R = 0.287 kJ/kg-K.

About the AMIE Section B Mechanical Exam

The AMIE (Associate Member of the Institution of Engineers) Section B Mechanical Engineering examination is conducted by the Institution of Engineers, Bangladesh (IEB). Section B covers the specialised mechanical engineering subjects, including engineering thermodynamics, heat and mass transfer, fluid mechanics and machinery, machine design, theory of machines, strength of materials, manufacturing processes, instrumentation and control, IC engines, refrigeration and air-conditioning, and power plant engineering.

Assessment

The AMIE Section B Mechanical Engineering examination consists of subject papers in the chosen branch, each worth 100 marks. This free bank provides 100 multiple-choice practice questions spread across the core Section B Mechanical subjects for study and self-assessment.

Time Limit

Each Section B written paper is typically 3 hours

Passing Score

Minimum pass grade required in each subject (each paper marked out of 100); confirm the current threshold with IEB

Exam Fee

Per-subject examination fee paid to IEB; confirm the current amount with the IEB AMIE office (Institution of Engineers, Bangladesh (IEB))

AMIE Section B Mechanical Exam Content Outline

12%

Engineering Thermodynamics

Laws of thermodynamics, gas processes, power cycles, entropy, availability, and steam properties.

12%

Machine Design

Factor of safety, theories of failure, fatigue, shafts, keys, springs, joints, and gear design.

10%

Heat and Mass Transfer

Conduction, convection, radiation, dimensionless numbers, fins, heat exchangers, and diffusion.

10%

Fluid Mechanics and Machinery

Fluid properties, Bernoulli and continuity, pipe flow, pumps, turbines, and cavitation.

10%

Manufacturing Process and Machine Tools

Casting, welding, machining, milling, non-traditional processes, and limits and fits.

Theory of Machines

Mechanisms, gears, flywheels, governors, balancing, vibrations, cams, and brakes.

Strength of Materials

Stress and strain, elastic constants, beams, columns, torsion, and pressure vessels.

Instrumentation and Control

Measurement, sensors, thermocouples, strain gauges, and PID control response.

IC Engines and Automobile

Four-stroke and diesel engines, combustion, performance, and automobile drivetrain.

Refrigeration and Air-conditioning

Vapour-compression cycle, COP, refrigeration units, and psychrometry.

Power Plant and Renewable Energy

Steam plant components, load factor, solar photovoltaics, and wind energy.

Industrial Administration and PPC

Production planning and control, critical path method, and inventory control.

How to Pass the AMIE Section B Mechanical Exam

What You Need to Know

Passing score: Minimum pass grade required in each subject (each paper marked out of 100); confirm the current threshold with IEB
Assessment: The AMIE Section B Mechanical Engineering examination consists of subject papers in the chosen branch, each worth 100 marks. This free bank provides 100 multiple-choice practice questions spread across the core Section B Mechanical subjects for study and self-assessment.
Time limit: Each Section B written paper is typically 3 hours
Exam fee: Per-subject examination fee paid to IEB; confirm the current amount with the IEB AMIE office

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

AMIE Section B Mechanical Study Tips from Top Performers

1Master the high-weight subjects first: engineering thermodynamics and machine design together account for nearly a quarter of the Mechanical Section B content.

2Practise numerical problems on cycles, heat transfer rates, fluid flow, stress, and torque, since AMIE papers reward correct worked calculations with clear steps.

3Use the official IEB syllabus to confirm exactly which topics fall under each Section B subject, and verify the current fee, grading, and examination schedule directly with the IEB AMIE office.

Frequently Asked Questions

Who conducts the AMIE Section B Mechanical Engineering examination?

The AMIE examination is conducted by the Institution of Engineers, Bangladesh (IEB). Section B covers the specialised subjects of the chosen engineering branch, in this case Mechanical Engineering, and follows the AMIE Section A examination.

What subjects are covered in AMIE Section B Mechanical Engineering?

Section B Mechanical covers engineering thermodynamics, heat and mass transfer, fluid mechanics and machinery, machine design, theory of machines, strength of materials, manufacturing processes and machine tools, instrumentation and control, IC engines and automobile, refrigeration and air-conditioning, power plant and renewable energy, and industrial administration.

How are AMIE Section B papers structured and marked?

Each AMIE Section B subject is a written paper marked out of 100, typically with a 3-hour duration. Candidates must obtain the required pass grade in each subject. This free practice bank uses 100 multiple-choice questions to help you revise the core concepts.

Is the AMIE qualification recognised in Bangladesh?

The AMIE qualification awarded after completing Sections A and B, the required computer training, and the industrial attachment is recognised in Bangladesh as equivalent to a bachelor's degree in engineering. Candidates should confirm current recognition rules with the IEB.