GATE ME MCQ, MSQ and NAT Questions: The GATE Mechanical Engineering question paper includes a total of 65 questions, all of which will be MCQs. Therefore, if you are preparing for the GATE 2025 exam, you must know how to answer GATE ME MCQ, MSQ and NAT questions. Since practice makes one perfect, the most effective way to prepare for GATE Mechanical Engineering MCQ questions is to solve as many of them as possible. Since Mechanical Engineering is one of the most popular and challenging papers, a disiplined study approach and continued practice of MCQs are required to excel in the GATE 2025 ME exam. In this article, we have compiled some of the important GATE MCQ, MSQ and NAT questions for Mechanical Engineering that you must practice.

Also Check - GATE 2025 Mechanical Engineering: Exam Date (Feb 2), Syllabus, Question Papers, Pattern, Cutoff

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GATE Practice MCQs for Mechanical Engineering 

GATE 2025 Mechanical Engineering syllabus PDF provides for mainly three types of questions: MCQs, NATs, and MSQs. The MCQs are some of the most important for those preparing for the GATE Mechanical Engineering exam. For MCQs, you will be given four options for each question and only one correct answer will be accepted. Thus, you will need to apply the fundamental concepts of Mechanical Engineering to solve the question. In the following sections, let’s have a look at some of the important GATE practice MCQs for Mechanical Engineering.

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Most Important GATE ME MCQ, MSQ and NAT Questions

The following are some of the important GATE MCQ questions and GATE NAT questions for Mechanical Engineering that you must practice. The NATs are primarily formula-based numerical problems that demand rigorous pratice. 

Q1. Consider a steady flow of water where two pipelines (pipe 1 and 2 pipe) combine into a single pipeline pipe – 3. The cross-sectional areas of all three pipelines are constant. The following data is given:

Assuming the water properties and the velocities to be uniform across the cross-section of the inlets and the outlet, the exit velocity (m/sec) in pipe 3 is:

a. 1

b. 1.5 

c. 2

d. 2.5

Ans. c. 2

Q2. A manometer is used for the pressure measurement in a closed tank. The three fluids f1, f2, and f3 have specific weights γ, 2γ, and 0.5γ, respectively. In order to ensure zero gauge pressure in the tank at the mid-height level (h/2), the height of the tank h (in m) is:

a. 2

b. 10

c. 100

d. 0

Ans. a. 2

Q3. A 2m x 2m square operating in a vertical wall is covered with a metallic plate of the same dimensions. Consider the acceleration due to gravity to be 10.0 m/sec². The force (in kN) exerted by water on the plate is:

a. 100

b. 150

c. 50

d. 120

Ans. d. 120

Q4. Water is flowing through a horizontal pipe of constant diameter and the flow is laminar. If the diameter of the pipe is increased by 50% keeping the volume flow rate constant, then the pressure drop in the pipe due to friction will decrease by:

a. 33%

b. 80%

c. 55%

d. 70%

Ans. b. 80%

Q5. A pipeline with a variable cross-section contains water with a specific weight 10⁴ N/m3. The flow conditions at two points 1 and 2 on the axis of the pipe are:

P₁ = 3 bar, V₁ = 10 m/sec

P₂ = 1 bar, V₂ = 20 m/sec

Consider frictional losses to be negligible. For no-flow conditions between points 1 and 2, if the height z₁ from the datum is 1m, then the height z₂ (in m) is: [g = 9.81 m/sec²]

a. 5.5 to 6.0

b. 2.5 to 3.0

c. 2.5

d. 10

Ans. a. 5.5 to 6.0

Q6. In an off-set slider crank mechanism, the crank is rotated at a constant speed of 150 rpm. The value of the angle θ is 20°. What is the ratio of forward-to-return stroke time? Can this mechanism be used in an application involving quick return?

a. 3.33, No

b. 0.73, Yes

c. 1.25, Yes

d. 0.73, No

Ans. c. 1.25, Yes

Q7. An engine, connected with a flywheel, is designed to operate at an average angular speed of 800 rpm. During the engine's operation, the maximum change in kinetic energy in a cycle is 6240 J. In order to keep the fluctuation of the angular speed within 士1% of its average value, the moment of inertia (in kg-m²) of the flywheel should be:

a. 40.50

b. 38.00

c. 45.00

d. 44.45

Ans. d. 44.45

Q8. An ideal gas of mass m is contained in a rigid tank of volume V at a pressure P. During a reversible process, its pressure reduces to P₁. The following statements regarding the process are made:

(P) Heat is transferred from the gas

(Q) Work done by the gas is zero

(R) Entropy of the gas remains constant

(S) Entropy of the gas decreases

Among the above statements, the correct ones are:

a. P and R only

b. P, Q, and R only

c. Q and R only

d. P, Q, and S only 

Ans. d. P, Q, and S only

Q9. For a two-dimensional state of stress defined as σ_xx = σ_yy = Τ_xy = S, Mohr's circle of stress has:

a. Center at (0,0) and radius S

b. Center at (S,0) and radius S

c. Center at (S,0) and radius 0

d. Center at (S/2, 0) and radius 0

Ans. b. Center at (S,0) and radius S

Q10. If the principal stress values are 120 MPa, –50 MPa, and 10 MPa in a given state of stress, then maximum shear stress in the material, in MPa, is:

a. 80

b. 90

c. 85

d. 100

Ans. c. 85

Q11. The simply-supported beam is loaded symmetrically using two equal point loads P. The radius of curvature of the deflection curve is 15 m for the portion of the beam that is subjected to pure bending. The vertical deflection (in mm) at point M, equidistant from both the supports is: (up to two decimal places)

a. 17.00

b. 20.55

c. 18.75

d. 19.00

Ans. c. 18.75

Q12. A thin-walled cylindrical pressure vessel of internal diameter 2 m is designed to withstand an internal pressure of 500 kPa (gauge). If the allowable normal stress at any point within the cylindrical portion of the vessel is 100 MPa, the minimum thickness of the plate of the vessel (in mm) is:

a. 5

b. 10

c. 15

d. 2

Ans. a. 5

Q13. In abrasive water jet machining, the velocity of water at the exit of the orifice, before mixing with abrasives, is 800 m/s. The mass flow rate of water is 3.4 kg/min. The abrasives are added to the water jet at a rate of 0.6 kg/min with negligible velocity. Assume that at the end of the focusing tube, abrasive particles and water come out with equal velocity. Consider that there is no air in the abrasive water jet. Assuming conservation of momentum, the velocity (in m/s) of the abrasive water jet at the end of the focusing tube is:

a. 700

b. 600

c. 680

d. 780

Ans. c. 680

Q14. In Computer Aided Process Planning, the determination of process sequence for the manufacture of any part design without predefined standard plans is known as:

a. Variant type process planning

b. Retrieval type process planning

c. generative type process planning

d. Group technology-based process planning

Ans. c. generative type process planning

Q15. A metallic cylindrical casing of an exhaust pipe has an inner radius of 50 mm and a wall thickness of 7 mm. If the thermal conductivity of the material of the casing is 50 W/m-K, then the thermal resistance of the casing in K/kW is: (up to three decimal places)

a. 0.41 to 0.42

b. 0.40

c. 0.50

d. 0.45 to 0.46

Ans. a 0.41 to 0.42

Also Check - GATE 2025 Mechanical Engineering Preparation Strategy: Timetable, Study Plan, Important Topics, Books

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CollegeDekho Pro Tips to Solve GATE MCQ for Mechanical Engineering

While preparing for the GATE Mechanical Engineering exam you should follow certain tips to improve MCQ-solving skills. The following are some of the most important tips to solve GATE MCQs for Mechanical Engineering: 

1. Understand the Mechanical Engineering syllabus: The GATE 2025 Mechanical Engineering syllabus has been uploaded to the official IIT Roorkee website. The syllabus includes all the important topics and chapters that will be covered in the GATE 2025 ME exam. Therefore, it is essential that you carefully go through the Mechanical Engineering syllabus and identify your strong and weak areas.

2. Solve previous year's question papers:GATE previous year question papers are a great source to understand what examiners will be asking in the upcoming exam. You can download GATE past years’ question papers online and practice them to understand the exam pattern and marking scheme. 

3. Follow lectures regularly and make short notes: If you are following certain online or offline courses, you must attend your lectures regularly and make short notes with each chapter. Short notes are very helpful while revising certain chapters.  

4. Improve time management: Certain MCQs may take a lot of your time while solving them. Therefore, you must come up with an effective time management strategy so that you have enough time to solve all the questions in the GATE 2025 Mechanical Engineering exam.

5. Put more emphasis on numerical problems: The GATE 2025 Mechanical Engineering exam is a numerical-heavy exam and most MCQs and NATs will require you to solve various complicated numerical problems. Therefore, you should focus more on solving the numerical problems to ensure sufficient practice before attempting the actual question paper.  

6. Read theories, formulas, and relations: The Mechanical Engineering syllabus includes several important theories, formulas, and relations. You will have to answer various MCQs that will be asked directly from these areas of the Mechanical Engineering syllabus. Therefore, you should emphasize more on preparing these concepts. 

7. Make a timetable: TImetables help you stay on track while preparing for the upcoming exam. You should craft a study routine that not only caters to all the sections of the syllabus but also provides you sufficient time for practicing GATE MCQ for Mechanical Engineering. remembering

8: Do regular revisions of important concepts: Revisions of important chapters and concepts solidify your exam preparations. Therefore, you should do regular revisions of all the important concepts.

9. Participate in test series: Test series are great practice materials while preparing for the GATE 2025 Mechanical Engineering exam. You should regularly participate in mock test series for Mechanical Engineering to strengthen your exam preparations.

10. Take sufficient rest and stay motivated: Taking care of your health is important during your exam preparations. Therefore, it is important to take rest and relax whenever necessary. It is also recommended to pursue your hobbies and participate in creative activities to stay motivated during preparation times.

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We hope this article proves helpful to students looking for a GATE MCQ for Mechanical Engineering. For more updates, stay tuned to CollegeDekho!