Sunday, September 6, 2026

iti Machinist trade Question RRB ALP Previous Year Paper part-b 75 Q&A

 

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1

RRB ALP Machinist  CBT-2 (PART-B)

28.07.2026 SHIFT-II

75 Q

 

 

RRB ALP 2nd Stage CBT Question for Machinist trade iti (CEN-01/2025) by railway life.

CBT-II Date - 28.07.2026, Time – 14:30 to 17:00 (Shift-II)
 

TOTAL QUESTION–75 CBT-2 PART-B, I.T.I TRADE– Machinist in Mechanical and allied group syllabus railway stage 2 exam.


Q.1 A 1:40 taper is to be turned using the compound rest. If the workpiece is 200 mm long, what is the approximate compound rest angle required?

1:40 Taper को Compound Rest का उपयोग करके Turn करना है। यदि Workpiece की Length 200 mm है, तो Approximate Compound Rest Angle कितना होगा?

A) 1.15 degrees / 1.15 डिग्री
B) 0.36 degrees / 0.36 डिग्री
C) 0.72 degrees / 0.72 डिग्री
D) 1.43 degrees / 1.43 डिग्री

Answer: C) 0.72 degrees / 0.72 डिग्री

Description:
For a 1:40 taper, the approximate half-angle is found from:

Taper per side = 1/2 × 1/40 = 1/80

Angle ≈ tan⁻¹(1/80) ≈ 0.72°

हिंदी में:
1:40 Taper के लिए Compound Rest का लगभग Half Angle:

1/80 = 0.0125

Angle ≈ tan⁻¹(1/80) ≈ 0.72°

इसलिए सही उत्तर 0.72 degrees है।


Q.2 After resolving an axis over-travel on a CNC lathe, which action should be performed before resuming the program?

CNC Lathe में Axis Over-Travel को Resolve करने के बाद Program Resume करने से पहले क्या Action करना चाहिए?

A) Change the workpiece and start a new setup / Workpiece बदलकर नया Setup शुरू करना
B) Ignore the zero return process and continue machining / Zero Return Process को Ignore करके Machining Continue करना
C) Restart the program immediately from where it stopped / जहाँ Program रुका था वहीं से तुरंत Restart करना
D) Verify axis position and reference zero return if needed / Axis Position Verify करना और आवश्यकता होने पर Reference Zero Return करना

Answer: D) Verify axis position and reference zero return if needed / Axis Position Verify करना और आवश्यकता होने पर Reference Zero Return करना

Description:
After an axis over-travel condition is resolved, the axis position should be verified and a reference or zero return should be performed if required before safely resuming the CNC program.

हिंदी में:
Axis Over-Travel की समस्या Resolve करने के बाद CNC Program को Resume करने से पहले Axis Position Verify करनी चाहिए और आवश्यकता होने पर Reference/Zero Return करना चाहिए।


Q.3 In a puncher type slotter, what is the primary movement of the cutting tool?

Puncher Type Slotter में Cutting Tool की Primary Movement क्या होती है?

A) Rotating horizontally / Horizontally Rotate करना
B) Moving diagonally / Diagonally Move करना
C) Oscillating in circles / Circular Motion में Oscillate करना
D) Reciprocating vertically / Vertically Reciprocate करना

Answer: D) Reciprocating vertically / Vertically Reciprocate करना

Description:
In a puncher type slotter, the cutting tool performs a reciprocating vertical motion to remove material from the workpiece.

हिंदी में:
Puncher Type Slotter में Cutting Tool Vertical Direction में Reciprocating Motion करता है, जिससे Workpiece से Material Remove होता है।


Q.4 A trainee accidentally activates the automatic tool changer while a hand is near the turret. What is the safest immediate action using panel controls?

यदि Trainee गलती से Automatic Tool Changer Activate कर देता है और उसका हाथ Turret के पास है, तो Panel Controls से सबसे Safe Immediate Action क्या है?

A) Press the cycle pause button to hold program execution / Program Execution रोकने के लिए Cycle Pause Button दबाना
B) Activate the emergency stop to instantly cut machine movement / Machine Movement को तुरंत रोकने के लिए Emergency Stop Activate करना
C) Decrease the axis movement speed using the override dial / Override Dial से Axis Movement Speed कम करना
D) Switch to manual mode on the panel controls / Panel Controls पर Manual Mode Select करना

Answer: B) Activate the emergency stop to instantly cut machine movement / Machine Movement को तुरंत रोकने के लिए Emergency Stop Activate करना

Description:
When there is an immediate risk of injury from unexpected machine movement, the Emergency Stop should be activated to stop hazardous machine motion.

हिंदी में:
यदि Unexpected Machine Movement के कारण तुरंत Injury का Risk हो, तो Emergency Stop Activate करना सबसे सुरक्षित Immediate Action है। इससे Hazardous Machine Movement को रोकने में सहायता मिलती है।


Q.5 Which method of cylindrical grinding is used when the workpiece is supported between centers and rotated?

जब Workpiece को Centers के बीच Support करके Rotate किया जाता है, तो कौन-सी Cylindrical Grinding Method का उपयोग किया जाता है?

A) Infeed center-less method / Infeed Center-less Method
B) End feed grinding method / End Feed Grinding Method
C) Through feed grinding method / Through Feed Grinding Method
D) Traverse grinding method / Traverse Grinding Method

Answer: D) Traverse grinding method / Traverse Grinding Method

Description:
In traverse grinding, the workpiece is supported between centers and rotated while the grinding wheel traverses along the length of the workpiece.

हिंदी में:
Traverse Grinding में Workpiece को Centers के बीच Support करके Rotate किया जाता है और Grinding Wheel Workpiece की Length के Along Traverse करती है।


Q.6 When a taper turning attachment is used instead of swiveling the compound rest, what machining capability is significantly enhanced?

Compound Rest को Swivel करने के बजाय Taper Turning Attachment का उपयोग करने से कौन-सी Machining Capability Significantly Enhance होती है?

A) It reduces the hardness of the workpiece material / यह Workpiece Material की Hardness कम करता है
B) It allows for cutting threads on the workpiece / यह Workpiece पर Threads Cut करने की सुविधा देता है
C) It enables the production of long tapers accurately / यह Long Tapers को Accurately Produce करने में सक्षम बनाता है
D) It makes the tool holder lighter for easier handling / यह Tool Holder को हल्का बनाता है

Answer: C) It enables the production of long tapers accurately / यह Long Tapers को Accurately Produce करने में सक्षम बनाता है

Description:
A taper turning attachment guides the cutting tool at the required angle and is particularly useful for producing long, accurate tapers without swiveling the compound rest.

हिंदी में:
Taper Turning Attachment Cutting Tool को Required Angle पर Guide करता है और Compound Rest को Swivel किए बिना Long और Accurate Tapers बनाने के लिए विशेष रूप से उपयोगी है।


 

Q.7 Which grade of pencil is recommended for single-stroke lettering in engineering drawings?

Engineering Drawings में Single-Stroke Lettering के लिए कौन-सा Pencil Grade Recommended है?

A) B grade / B Grade
B) F grade / F Grade
C) HB grade / HB Grade
D) 2H grade / 2H Grade

Answer: C) HB grade / HB Grade

Description:
HB pencils provide a suitable balance of hardness and darkness for producing clear and uniform single-stroke lettering in engineering drawings.

हिंदी में:
HB Pencil में Hardness और Darkness का उचित Balance होता है, इसलिए Engineering Drawings में Clear और Uniform Single-Stroke Lettering के लिए यह Suitable है।

 


Q.8 Which material is least likely to be affected by rapid temperature changes during cutting?

Cutting के दौरान Rapid Temperature Changes से कौन-सा Material सबसे कम प्रभावित होने की संभावना रखता है?

A) Ceramic tool material / Ceramic Tool Material
B) High-speed steel (HSS) / High-Speed Steel (HSS)
C) Cast alloy steel / Cast Alloy Steel
D) Carbon tool steel / Carbon Tool Steel

Answer: B) High-speed steel (HSS) / High-Speed Steel (HSS)

Description:
High-speed steel (HSS) has comparatively good resistance to thermal shock and can withstand rapid temperature changes during cutting better than the other listed materials.

हिंदी में:
High-Speed Steel (HSS) में Thermal Shock के प्रति अपेक्षाकृत अच्छी Resistance होती है। इसलिए Cutting के दौरान होने वाले Rapid Temperature Changes को यह अन्य दिए गए Materials की तुलना में बेहतर सहन कर सकता है।


Q.9 The main factor influencing a lathe’s firmness under load is:

Load के Under Lathe की Firmness को प्रभावित करने वाला मुख्य Factor क्या है?

A) Bed width and design / Bed की Width और Design
B) Spindle bore diameter / Spindle Bore Diameter
C) Swing over bed / Swing Over Bed
D) Spindle speed range / Spindle Speed Range

Answer: A) Bed width and design / Bed की Width और Design

Description:
The width and design of the lathe bed significantly influence its rigidity and ability to withstand cutting loads without excessive deflection or vibration.

हिंदी में:
Lathe Bed की Width और Design उसकी Rigidity को काफी प्रभावित करती है। एक मजबूत Bed Cutting Load के दौरान Excessive Deflection और Vibration को कम करने में सहायता करता है।


Q.10 What is the main function of the spindle in a bench vice?

Bench Vice में Spindle का मुख्य Function क्या है?

A) To increase friction on the workpiece / Workpiece पर Friction बढ़ाना
B) To support the base / Base को Support करना
C) To protect the jaws / Jaws को Protect करना
D) To convert rotary motion into linear motion / Rotary Motion को Linear Motion में Convert करना

Answer: D) To convert rotary motion into linear motion / Rotary Motion को Linear Motion में Convert करना

Description:
When the vice handle is rotated, the spindle converts this rotary motion into linear movement of the movable jaw, allowing the workpiece to be clamped or released.

हिंदी में:
Vice Handle को Rotate करने पर Spindle Rotary Motion को Movable Jaw की Linear Motion में Convert करता है। इससे Workpiece को Clamp या Release किया जाता है।


Q.11 When setting up for a heavy milling operation, why is it important to ensure that the workpiece and frame are securely locked in position?

Heavy Milling Operation के लिए Setup करते समय Workpiece और Frame को Position में Securely Lock करना क्यों जरूरी है?

A) Extends table travel distance / Table Travel Distance बढ़ाता है
B) Increases spindle rotation speed / Spindle Rotation Speed बढ़ाता है
C) Improves coolant flow rate / Coolant Flow Rate Improve करता है
D) Prevents unwanted movement during cutting / Cutting के दौरान Unwanted Movement को रोकता है

Answer: D) Prevents unwanted movement during cutting / Cutting के दौरान Unwanted Movement को रोकता है

Description:
Heavy milling generates significant cutting forces. Securely locking the workpiece and frame prevents movement, helping maintain machining accuracy and safe operation.

हिंदी में:
Heavy Milling में Significant Cutting Forces उत्पन्न होती हैं। Workpiece और Frame को Securely Lock करने से Unwanted Movement रुकती है और Machining Accuracy तथा Safety बनाए रखने में सहायता मिलती है।


Q.12 Which type of drilling machines is specifically designed to accommodate multiple spindles so that different drilling operations can be performed at the same time?

किस प्रकार की Drilling Machine में Multiple Spindles होते हैं, जिससे अलग-अलग Drilling Operations एक साथ किए जा सकते हैं?

A) Bench drilling machine / Bench Drilling Machine
B) Gang drilling machine / Gang Drilling Machine
C) Upright drilling machine / Upright Drilling Machine
D) Radial drilling machine / Radial Drilling Machine

Answer: B) Gang drilling machine / Gang Drilling Machine

Description:
A gang drilling machine has multiple drilling units or spindles arranged in a row, allowing different operations such as drilling, reaming, tapping, or countersinking to be performed sequentially or efficiently on the same workpiece.

हिंदी में:
Gang Drilling Machine में Multiple Drilling Units या Spindles होते हैं। इससे एक ही Workpiece पर Drilling, Reaming, Tapping और Countersinking जैसी अलग-अलग Operations को Efficiently किया जा सकता है।


Q.13 A production line experiences repeated delays due to waiting for maintenance staff to fix machines. As a machinist, what process change would best minimize downtime in this scenario?

Production Line में Maintenance Staff के Machine Repair करने की प्रतीक्षा के कारण बार-बार Delay हो रहा है। Downtime को कम करने के लिए कौन-सा Process Change सबसे बेहतर होगा?

A) Extend machinery warranty agreements for repairs / Repairs के लिए Machinery Warranty Agreements Extend करना
B) Rescheduling shifts to match maintenance staff availability / Maintenance Staff की Availability के अनुसार Shifts Reschedule करना
C) Increasing the number of maintenance staff on call / On-Call Maintenance Staff की संख्या बढ़ाना
D) Training operators to perform routine maintenance tasks / Operators को Routine Maintenance Tasks करने के लिए Train करना

Answer: D) Training operators to perform routine maintenance tasks / Operators को Routine Maintenance Tasks करने के लिए Train करना

Description:
Training operators to perform appropriate routine maintenance can reduce dependence on maintenance staff for minor tasks and help minimize machine downtime.

हिंदी में:
Operators को Appropriate Routine Maintenance Tasks की Training देने से छोटी Maintenance Activities के लिए Maintenance Staff पर Dependence कम होती है और Machine Downtime को कम करने में सहायता मिलती है।


Q.14 In a milling operation, the actual cycle time is consistently higher than the estimated cycle time. Which factor is most likely causing this discrepancy if all other parameters remain constant?

Milling Operation में Actual Cycle Time लगातार Estimated Cycle Time से अधिक है। यदि बाकी सभी Parameters Constant हैं, तो इस Discrepancy का सबसे संभावित कारण क्या है?

A) Machine speed is always constant / Machine Speed हमेशा Constant रहती है
B) Frequent tool changes are causing delays / Frequent Tool Changes के कारण Delay हो रहा है
C) Operator skill is unchanged / Operator Skill Unchanged है
D) Material properties remain the same during operation / Operation के दौरान Material Properties Same रहती हैं

Answer: B) Frequent tool changes are causing delays / Frequent Tool Changes के कारण Delay हो रहा है

Description:
Frequent tool changes add non-cutting time to the operation. This increases the actual cycle time even when the programmed machining parameters remain unchanged.

हिंदी में:
Frequent Tool Changes से Non-Cutting Time बढ़ता है। इसलिए यदि Machining Parameters में कोई बदलाव नहीं है, तब भी Tool Changes के कारण Actual Cycle Time Estimated Cycle Time से अधिक हो सकता है।

Q.15 What does the term "machine hour rate" refer to in costing?

Costing में "Machine Hour Rate" शब्द का क्या अर्थ है?

A) The total machine-related cost allocated for one year / एक वर्ष के लिए Allocated Total Machine-Related Cost
B) The total operating profit earned per machine per day / प्रत्येक Machine से प्रति दिन Earn किया गया Total Operating Profit
C) The factory overhead cost incurred per machine hour / प्रति Machine Hour होने वाली Factory Overhead Cost
D) The total machine-generated revenue earned per shift / प्रति Shift Machine से Earn किया गया Total Revenue

Answer: C) The factory overhead cost incurred per machine hour / प्रति Machine Hour होने वाली Factory Overhead Cost

Description:
Machine hour rate represents the factory overhead cost associated with operating a machine for one hour.

हिंदी में:
Machine Hour Rate का अर्थ एक Machine को एक घंटे चलाने पर होने वाली Factory Overhead Cost से है।


Q.16 In a scenario where a CNC vertical machining center is required to maintain extremely tight tolerances over an extended production run, which closed-loop control component is directly responsible for identifying and reporting deviations from the programmed tool path?

CNC Vertical Machining Center में लंबे Production Run के दौरान Extremely Tight Tolerances बनाए रखने के लिए कौन-सा Closed-Loop Control Component Programmed Tool Path से Deviation को Identify और Report करता है?

A) Spindle motor drive / Spindle Motor Drive
B) Power supply module / Power Supply Module
C) Position feedback transducer / Position Feedback Transducer
D) Coolant distribution unit / Coolant Distribution Unit

Answer: C) Position feedback transducer / Position Feedback Transducer

Description:
A position feedback transducer measures the actual position of the machine axis and provides feedback to the control system, allowing deviations from the programmed position to be detected.

हिंदी में:
Position Feedback Transducer Machine Axis की Actual Position को Measure करता है और Control System को Feedback देता है। इससे Programmed Position से होने वाले Deviation को Detect किया जा सकता है।


Q.17 A machinist is required to finish a hole in a hard alloy component. Which reamer should be selected?

Hard Alloy Component में Hole को Finish करने के लिए Machinist को कौन-सा Reamer Select करना चाहिए?

A) Copper / Copper
B) Mild Steel / Mild Steel
C) Brass / Brass
D) Carbide / Carbide

Answer: D) Carbide / Carbide

Description:
Carbide is a hard and wear-resistant cutting material, making a carbide reamer suitable for finishing holes in hard alloy components.

हिंदी में:
Carbide एक High-Hardness और Wear-Resistant Cutting Material है। इसलिए Hard Alloy Components में Hole Finishing के लिए Carbide Reamer Suitable होता है।


Q.18 Which property of the coolant fluid is most critical to ensure both effective cooling and lubrication during vertical milling operations?

Vertical Milling Operations के दौरान Effective Cooling और Lubrication दोनों सुनिश्चित करने के लिए Coolant Fluid की कौन-सी Property सबसे महत्वपूर्ण है?

A) The coolant must have high electrical conductivity for machine safety / Machine Safety के लिए Coolant की Electrical Conductivity High होनी चाहिए
B) The coolant must be brightly colored for easy visibility while machining / Machining के दौरान Visibility के लिए Coolant का Brightly Colored होना आवश्यक है
C) The coolant must be able to produce foam to protect the workpiece from chips / Workpiece को Chips से Protect करने के लिए Coolant का Foam Produce करना आवश्यक है
D) The coolant must have suitable viscosity and thermal conductivity for machining / Machining के लिए Coolant की Suitable Viscosity और Thermal Conductivity होनी चाहिए

Answer: D) The coolant must have suitable viscosity and thermal conductivity for machining / Machining के लिए Coolant की Suitable Viscosity और Thermal Conductivity होनी चाहिए

Description:
Suitable viscosity supports lubrication, while appropriate thermal conductivity helps transfer heat away from the cutting zone.

हिंदी में:
Suitable Viscosity Lubrication में सहायता करती है, जबकि Appropriate Thermal Conductivity Cutting Zone से Heat को Remove करने में सहायता करती है।


Q.19 When changing from a shorter to a longer tool on a CNC lathe, which adjustment must be made to maintain machining accuracy?

CNC Lathe में Shorter Tool की जगह Longer Tool लगाने पर Machining Accuracy बनाए रखने के लिए कौन-सा Adjustment करना आवश्यक है?

A) Adjust the spindle feed rate / Spindle Feed Rate को Adjust करना
B) Update the tool length offset value / Tool Length Offset Value को Update करना
C) Update the work table offset value / Work Table Offset Value को Update करना
D) Select a different part program / Different Part Program Select करना

Answer: B) Update the tool length offset value / Tool Length Offset Value को Update करना

Description:
Changing the tool length changes the actual tool position. Updating the tool length offset allows the CNC control to compensate for this difference and maintain machining accuracy.

हिंदी में:
Tool Length बदलने पर Actual Tool Position भी बदल जाती है। Tool Length Offset को Update करने से CNC Control इस Difference को Compensate कर सकता है और Machining Accuracy बनाए रख सकता है।


Q.20 When does a parallelogram become a rectangle?

Parallelogram कब Rectangle बन जाता है?

A) When all four internal angles become right angles / जब चारों Internal Angles Right Angles हो जाएँ
B) When all four boundary sides become unequal in length / जब चारों Boundary Sides की Length Unequal हो जाए
C) When the two adjacent sides become equal in length / जब दो Adjacent Sides की Length Equal हो जाए
D) When the two diagonal lines become perpendicular / जब दोनों Diagonal Lines Perpendicular हो जाएँ

Answer: A) When all four internal angles become right angles / जब चारों Internal Angles Right Angles हो जाएँ

Description:
A parallelogram becomes a rectangle when all its internal angles are 90°.

हिंदी में:
जब किसी Parallelogram के सभी चार Internal Angles 90° (Right Angles) हो जाते हैं, तो वह Rectangle बन जाता है।


 

Q.21 Which part of the lathe is mounted on the left of the bed?

Lathe के Bed के Left Side पर कौन-सा Part Mounted होता है?

A) Tool post / Tool Post
B) Tailstock / Tailstock
C) Headstock / Headstock
D) Carriage / Carriage

Answer: C) Headstock / Headstock

Description:
The headstock is mounted at the left-hand side of the lathe bed and houses the spindle and associated drive mechanism.

हिंदी में:
Lathe का Headstock Bed के Left-Hand Side पर Mounted होता है। इसमें Spindle और उससे संबंधित Drive Mechanism स्थित होता है।











FAQ

 

Q1. RRB ALP CBT2 PART-B qualified required in final merit?

Answer- No, the RRB ALP CBT2 Part B (the iti trade test) is not included in the final merit list calculation. It is a qualifying section, meaning candidates must score the minimum qualifying marks (35% or 27 marks out of 75) to pass, but the marks obtained in Part B are not used to determine the final merit. The final merit is based on the performance in Part A of CBT2 and the CBAT (Computer Based Aptitude Test).

 

Q2. where rrb alp cbt2 part-b mcq questions and answers available?

Answer- Candidates can download rrb alp cbt2 part-b question paper after Response key has been published. also available many website or Paid version E-BOOK & PDF with solution Candidates can download railway life pdf E-book for better under stand from this Link  click here  

 

 

Q3- Machinist iti trade is under which group of ALP exam?

Answer - Machinist iti trade Group is mechanical and Automobile and Allied Trade industrial training institution is full form name of ITI.