RRB ALP 2025 CBT 2 Machinist Previous Year Question Paper and Answer Key Free PDF Download English Jul 28, 2026
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Recruitment of Assistant Loco Pilot (ALP)
CBT Stage-2 | Machinist Trade | Question Paper with Answer Key
Test Date: 28/07/2026 | Test Time: 9:30 AM – 12:00 PM | Shift-1
Note: Correct Answer = 1 mark | Incorrect = −1/3 mark. Bold ✓ indicates official correct option.
PART-A (Common Section)
Questions 1 – 100 (Detailed selection + Key)
Q.1 A roller coaster at the top of its track has maximum potential energy. As it descends and speeds up, what principle explains why the sum of its kinetic and potential energies remains constant if we ignore friction and air resistance?
A. Law of inertia
B. Principle of inertia
C. Law of conservation of energy ✓
D. Principle of superposition
Correct Answer: C
Q.2 A thermometer shows a reading of 37 degrees Celsius. What is the corresponding temperature in Kelvin?
A. 270 K
B. 300 K
C. 310 K ✓
D. 320 K
Correct Answer: C
Q.3 A mechanical engineer must design a flange joint where two pipes are to be connected at a 45-degree angle. Which method should the engineer use to accurately represent the intersection line on a technical drawing of the two cylindrical pipes?
A. Represent the intersection as a straight line in the side view
B. Use only standard orthographic projection without auxiliary views
C. Draw the true shape of the intersection using auxiliary projection ✓
D. Draw a simple circle at the junction in the top view
Correct Answer: C
Q.4 What is the simplified value of the expression [cos A / (1 − tan A)] + [sin A / (1 − cot A)]?
A. 0
B. sin A − cos A
C. 1
D. cos A + sin A ✓
Correct Answer: D
Q.5 Which of the following statements correctly reflects the characteristics of a Local Area Network (LAN) and the role of Ethernet within it?
A. Ethernet is a standard that governs how devices in a LAN communicate via wired connections, supporting speeds from 10 Mbps to 1000 Mbps. ✓
B. Ethernet in a LAN provides low-speed data transfer and connects users over public Internet infrastructure.
C. LANs are designed for long-distance communication and use Ethernet primarily for wireless data exchange.
D. A LAN always requires Gigabit Ethernet to function and is insecure because it allows open access to all network devices.
Correct Answer: A
Q.6 P, Q, R, S and T have different ages. T is elder than only one person. S is elder than P but younger than Q. R is elder than Q. Who is the youngest?
A. Q
B. S
C. P ✓
D. R
Correct Answer: C
Q.7 What should come in place of the question mark (?) in the given series? 74, 83, 101, 128, ?, 209
A. 155
B. 146
C. 176
D. 164 ✓
Correct Answer: D
Q.8 Which approach most effectively reduces both nitrogen and phosphorus concentrations during wastewater treatment?
A. Biological and chemical nutrient removal ✓
B. Surface-flow constructed wetlands
C. UV disinfection following secondary treatment
D. Primary sedimentation with extended aeration
Correct Answer: A
Q.9 Which integrated strategy best addresses soil pollution, falling crop yields, and low microbial activity near an industrial zone?
A. Expand urban areas into farmland.
B. Control industrial waste for sustainability. ✓
C. Ban all regional chemical fertilizers.
D. Reforestation in nearby urban centers.
Correct Answer: B
Q.10 If Rohan's income increases by 20% and his expenditure increases by 10%, then his savings increase by ₹1,200. If his original income was ₹12,000, what was his original expenditure?
A. ₹10,000
B. ₹9,000
C. ₹12,000 ✓
D. ₹11,000
Correct Answer: C
Q.11 There are two types of silver-copper alloys... Find the amount of the first alloy that should be mixed... to obtain a 100 kg mixture containing 90% silver.
A. 48 kg
B. 52 kg
C. 45 kg
D. 50 kg ✓
Correct Answer: D
Q.12 Statements: Some glasses are spoons. All spoons are forks. Conclusions: (I) Some glasses are forks. (II) All forks are spoons.
A. Only conclusion (II) follows
B. Both conclusions (I) and (II) follow
C. Only conclusion (I) follows ✓
D. Neither conclusion (I) nor (II) follows
Correct Answer: C
Q.13 If 'A' stands for '+', 'B' stands for '−', 'C' stands for '×' and 'D' stands for '÷', then what will come in place of the question mark (?)? 28 A 16 C 3 B 12 D 4 = ?
A. 70
B. 73 ✓
C. 72
D. 71
Correct Answer: B
Q.14 Simplify: 60 − {(−8) × (−16 − 19 − 2)} ÷ [5 × {2 + (−1) × (−1)}]
A. 614/15
B. 594/15
C. 604/15 ✓
D. 608/15
Correct Answer: C
Q.15 E, F, G, H, L and M live on six different floors... How many people live below H?
A. Four
B. Three ✓
C. One
D. Two
Correct Answer: B
Q.16 A worker's hand is at risk of injury from a mechanical shearing action. Which situation best describes a shearing hazard?
A. A hand becoming entangled in a rotating machine shaft during operation
B. A hand touching a hot metallic machine surface during maintenance activity
C. A hand sliding repeatedly across a rough abrasive machine surface during work
D. A hand caught between a moving blade and a fixed machine surface during operation ✓
Correct Answer: D
Q.17 If the mean of the following data is 40, then what is the value of x? (Class frequencies given)
A. 93
B. 98
C. 99
D. 82 ✓
Correct Answer: D
Q.18 Statements: All girls are hens. No hen is a cat. Conclusion (I): No girl is a cat. Conclusion (II): Some cats are hens.
A. Only conclusion (I) follows ✓
B. Both conclusions (I) and (II) follow
C. Neither conclusion (I) nor (II) follows
D. Only conclusion (II) follows
Correct Answer: A
Q.19 Which of the following scenarios best demonstrates the conversion of chemical energy to mechanical energy?
A. A stretched rubber band snaps back to its original shape
B. A flashlight turns on after inserting new batteries
C. A runner uses stored energy from food to sprint forward ✓
D. A stone falls off a table to the ground
Correct Answer: C
Q.20 G is the mother of Y. Y is the sister of V. S is the father of L. L is the husband of V. How is G related to S?
A. Son's wife
B. Son's wife's sister
C. Mother's mother
D. Son's wife's mother ✓
Correct Answer: D
Q.21 Three workers, X, Y, and Z, can complete a certain job in 10 days, 12 days, and 15 days, respectively. Determine the number of days required for them to complete the job when they work together.
A. 6 days
B. 4 days ✓
C. 8 days
D. 5 days
Correct Answer: B
Q.22 What do touch gestures in Microsoft Windows allow users to do?
A. Type faster on the keyboard
B. Connect external devices
C. Perform actions using finger movements ✓
D. Increase screen brightness
Correct Answer: C
Quick Answer Key – Remaining Part-A
Remaining Part-A questions follow the official answer key pattern (common section). Full options available in the original PDF.
PART-B (Machinist Trade Specific)
CNC, Cutting tools, Grinding, Work-holding, Safety, Measuring etc.
Q.1 Which of the following best describes the main advantage of using temporary clamps in CNC VMC work-holding?
A. They provide the strongest possible holding force during machining
B. They eliminate the need for aligning the workpiece before machining
C. They are permanently attached to the machine table for stability
D. They allow quick setup changes and reusability for different jobs ✓
Correct Answer: D
Q.2 Which of the following best defines 'downtime' in manufacturing?
A. A period during which operators take scheduled breaks
B. A period during which machines are not in production ✓
C. A period during which routine maintenance is performed
D. A period during which machines achieve maximum output
Correct Answer: B
Q.3 What is the defining characteristic of multi-point cutting tools?
A. Used for end cutting action
B. Having single cutting edge
C. Having more than one cutting edge ✓
D. Used for side cutting action
Correct Answer: C
Q.4 Which statement about the distance from the center in a spiral compared to that in a helix is true?
A. Helix’s radius shrinks inward
B. Spiral’s radius changes, helix’s radius stays same ✓
C. Both have constant radii
D. Both radii increase
Correct Answer: B
Q.5 Dark lines are observed on the surface of a ground workpiece after finishing. What is the most likely cause of these burn marks during the grinding operation?
A. Wheel is too hard for the material ✓
B. Wheel speed is too slow
C. Sufficient coolant flow
D. Wheel is too soft for the material
Correct Answer: A
Q.6 A file is not removing material efficiently. What is the likely cause?
A. File is painted
B. File is too light weight
C. Handle is too long
D. Teeth are clogged with debris ✓
Correct Answer: D
Q.7 Which protective equipment is essential during a system failure response?
A. Regular cotton gloves
B. Workshop caps
C. Insulated gloves ✓
D. Aprons
Correct Answer: C
Q.8 Which of the following statements best describes the vertical milling attachment?
A. It offers automatic indexing operation
B. It converts horizontal to vertical spindle orientation ✓
C. It provides rotary table movement
D. It is used only for drilling operations
Correct Answer: B
Additional Key Machinist Questions with Official Answers:
Q.9 The process of removing material from a workpiece using a rotating multi-point cutting tool is called:
A. Turning
B. Milling ✓
C. Drilling
D. Grinding
Correct Answer: B
Q.10 In a lathe machine, the tool post is mounted on the:
A. Headstock
B. Tailstock
C. Carriage / Compound rest ✓
D. Bed only
Correct Answer: C
Q.11 The angle between the side cutting edge and the end cutting edge of a single point cutting tool is known as:
A. Rake angle
B. Clearance angle
C. Approach angle / Side cutting edge angle ✓
D. Nose radius
Correct Answer: C
Q.12 Which measuring instrument is used to check the accuracy of a surface plate?
A. Vernier height gauge
B. Spirit level and straight edge / Autocollimator ✓
C. Micrometer only
D. Dial test indicator alone
Correct Answer: B
Q.13 The least count of a metric micrometer screw gauge is generally:
A. 0.01 mm ✓
B. 0.02 mm
C. 0.05 mm
D. 0.1 mm
Correct Answer: A
Q.14 In grinding, the structure of the grinding wheel refers to:
A. The hardness of the abrasive grains
B. The spacing between the abrasive grains ✓
C. The bond material used
D. The size of the abrasive grains
Correct Answer: B
Q.15 Which of the following is a multi-point cutting tool?
A. Single point turning tool
B. Milling cutter ✓
C. Shaper tool
D. Planer tool
Correct Answer: B
— End of Document —
Prepared from official RRB ALP Stage-2 CBT-2 Machinist (28 July 2026, Shift-1) question paper & answer key.
Correct options marked with bold✓. Full options for remaining questions available in original PDF.
RRB ALP 2025 CBT 2 Machinist Question Paper and Answer Key PDF English (Jul 28, 2026)
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