Mechanical Technology 91 Question Paper Exclusive [top]

The Mechanical Technology (91) question paper is a specialized assessment for Class 10 (Level-2) students, often associated with vocational or pre-vocational training boards like the Maharashtra State Board. The exam is designed to test both theoretical understanding and practical knowledge of engineering principles, with a significant emphasis on technical drawing and workshop processes. Exam Structure and Marking Scheme

The written theory paper typically has a duration of 3 hours and is worth a total of 80 marks. A passing score generally requires a minimum of 33% in the theory component.

Objectives (20 Marks): Includes multiple-choice questions, match-the-pairs, true/false statements, and one-sentence answers.

Short Answer Questions (12 Marks): Requires concise explanations of technical concepts.

Long Answer Questions (48 Marks): Divided into multiple sections (4, 5, 8, and 10-mark questions) that test in-depth knowledge and complex problem-solving. mechanical technology 91 question paper exclusive

Practical Components: Beyond the written paper, the evaluation often includes term work (10 marks), project work (10 marks), oral/viva voce (10 marks), and direct observation of practical skills (10 marks). Core Syllabus Topics

The "91" curriculum covers a wide array of mechanical and industrial subjects, focusing on hands-on skills:

Engineering Drawing (MT-201): Mastering technical sketches and blue-print reading.

Metal Joining Processes (MT-202): Advanced techniques in welding and joining materials. The Mechanical Technology (91) question paper is a

Sheet Metal Work (MT-203): Fabrication and manipulation of sheet metal components.

Material Removal Processes (MT-204): Fundamental machining and lathe operations.

Safety Protocols: Understanding industrial safety signs, fire extinguisher operations, and personal protective equipment (PPE). Study Resources and Past Papers

For students looking for "exclusive" or official preparation materials, several platforms provide archived papers and model question sets: Answer key and worked solutions Provide full worked

Maharashtra Study: This portal offers a comprehensive repository of Maharashtra Board Class 10 Mechanical Technology question papers spanning multiple years, including the most recent 2024 and 2025 sessions.

College Sidekick: Hosts detailed Evaluation Schemes and Paper Patterns that outline exactly how marks are distributed across various topics.

Scribd: Offers downloadable PDFs of Mechanical Technology Exam Papers that include sections on automotive engines, forces, and materials. 91-Mechanical Technology evalution scheme.pdf

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Answer key and worked solutions

Provide full worked solutions for numeric problems, clear step-by-step reasoning, and annotated drawings for Part C. Include unit checks and common mistake notes.

Example solution excerpt (Q11 elongation):

• Stress σ = F/A = 20,000 N / 500×10^-6 m² = 40 MPa
• Strain ε = σ/E = 40×10^6 / 210×10^9 = 1.904×10^-4
• Elongation ΔL = εL = 1.904×10^-4 × 2 m = 0.000381 m = 0.381 mm

Typical Question Types (with examples)

• Numerical problem: "Determine the maximum bending stress in a simply supported beam with point load at midspan."
• Design/calculation: "Design a spur gear pair for given power, speed, and life; include module, number of teeth, and face width."
• Short concept: "Explain shear stress distribution across a rectangular cross-section under transverse shear."
• Drawing: "Sketch the assembly drawing of a flanged coupling, indicate key dimensions and tolerance fits."
• Troubleshooting: "Identify likely causes of bearing overheating and propose corrective actions."

Section B: Thermodynamics & Heat Engines (35 Marks)

• Question 4: Sketch the P-V diagram for a four-stroke diesel engine and indicate the theoretical valve timing events.
• Question 7 (The infamous '91 question): A steam turbine receives steam at 15 bar and 300°C. The condenser pressure is 0.1 bar. Calculate the Rankine cycle efficiency. Hints: Ignore pump work.

Section A: Applied Thermodynamics (40 Marks)

• Question 1 (Compulsory): Steam nozzle efficiency calculations. Students are given initial pressure and temperature and must compute exit velocity using steam tables exclusively.
• Question 2: IC Engine cycles (Otto and Diesel). A classic problem asks you to draw the P-V diagram and calculate air standard efficiency given compression ratios common in 1991 engines (e.g., 8:1).

3. Question Paper Trends

• High weightage (40–50%) on numerical problems from SOM and Thermodynamics.
• Theory questions often ask for comparisons (e.g., impulse vs reaction turbine, CI vs SI engine).
• Drawing questions may require sketching simple machine parts (screw jack, coupling, pulley).

2. Common Topics in Mechanical Technology (Code 91)

• Engineering Drawing – orthographic projections, sectional views
• Strength of Materials – stress/strain, bending moment, shear force
• Thermodynamics – laws, cycles (Otto, Diesel, Rankine)
• Fluid Mechanics – Bernoulli, flow measurements, pumps
• Machine Design – shafts, keys, couplings, bearings
• Manufacturing Processes – casting, welding, machining
• Power Transmission – belts, gears, clutches, brakes

4. Manufacturing Processes

• The Feature: A shift from "what is this" to "how do you fix this."
• The Challenge: Questions on CNC programming basics or limitations of conventional lathe operations. For example, "Explain the setup required for turning a taper using a compound rest slide versus a taper turning attachment."

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5. How to Use This Report for Exam Preparation

• Solve at least 5 past papers of the same code.
• Focus on unit conversions (N/mm² to MPa, kW to hp) – common errors.
• Practice freehand sketches of mechanisms (slider-crank, cam-follower).
• Memorize standard assumptions for derivations (steady flow, no friction, ideal gas).

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