To speed up the railway exam preparations for the RRB ALP CBT 2 Part-B Exam, the candidates must revise the RRB Assistant loco pilot Previous Year Question Papers, as these papers help in a better understanding of the exam question format and to self-analyses their strong and weak topics. Practicing the RRB ALP Previous Year Question Papers diesel mechanic trade must be included in the exam preparations to achieve substantial improvement to score better marks in the RAILWAY ALP Examinations. Attempting RRB ALP Previous Year Papers for CBT 2 PART-B exams would lessen the chances of any mistakes or errors while solving the exam questions in the real exam. RRB Previous Year Question Papers for Assistant loco pilot (ALP).
RRB ALP Previous Year Question Papers typped are available here to revise diesel mechanic I.T.I Trade for both CBT 2 part-B. Candidates can download pdf E-book for better under stand from this Link click here and speed up exam preparations.
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1 |
RRB ALP DIESEL Mechanic CBT-2 (PART-B) |
02.05.2025 SHIFT-II |
75 Q |
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RRB ALP 2nd Stage CBT Question for Diesel mechanic (CEN-01/2024)
CBT 2 Date - 02.05.2025, Time – Evening (Shift-II)
TOTAL QUESTION–75 CBT-2 PART-B, I.T.I TRADE– mechanic diesel
Q.1 If a machine has an efficiency of 80%, it means:
1. the machine has a velocity ratio and mechanical advantage both equal to 80
2. the machine loses 20% of the input
3. the machine does not have any loss in input energy
4. the machine produces more output than input
Ans- 2. the machine loses 20% of the input
Q.2 When did India implement the Hazardous Wastes (Management and Handling) Rules to regulate the disposal and handling of hazardous waste?
1. 1989 2. 1987 3. 1982 4. 2000
Ans- 1. 1989
Q.3 What is the function of cooling fins in a tubular-type radiator core?
1. To support tubes
2. To strengthen structure
3. To circulate water
4. To absorb and radiate heat
Ans-4. To absorb and radiate heat
Q.4 What is the primary principle behind the generation of electrical energy in a piezoelectric device?
1. Conversion of mechanical stress into electrical energy
2. Conversion of light energy into electrical energy
3. Conversion of chemical energy into electrical energy
4. Conversion of thermal energy into electrical
Ans- 1. Conversion of mechanical stress into electrical energy
Q.5 Which of the following punch marks is used for the correct location and seating of the divider point?
1. Centre punch marks of 60°
2. Prick punch marks of 30°
3. Prick punch marks of 120°
4. Centre punch marks of 30°
Ans-2. Prick punch marks of 30°
Q.6 What is the accuracy level of a vernier caliper that can be read?
1. 0.02 mm 2. 0.01 mm 3. 0.1 mm 4. 0.2 mm
Ans -1. 0.02 mm
Q.7 Which of the following emission control devices is a charcoal filled device?
1. EGR valve 2. EVAP canister
3. Oxygen sensor 4. Catalytic converter
Ans- 2. EVAP canister
Q.8 Match the correct length and breadth of the Trimmed sizes of sheets.
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Designation |
Trimmed size |
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A. A0 |
P. 297 × 420 |
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B. A1 |
Q. 420× 594 |
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C. A2 |
R. 594 × 841 |
|
D. A3 |
S. 841 × 1189 |
1. A - S, B - R, C - Q, D – P
2. A - R, B - S, C - Q, D – P
3. A - S, B - R, C - P, D – Q
4. A - P, B - R, C - Q, D – S:
Ans- 1. A - S, B - R, C - Q, D – P
Q.9 When drawing a curved line of a specific length in an engineering drawing, which toolis most appropriate for ensuring accuracy?
1. Protractor
2. Straightedge
3. French Curve
4. Compass
Ans - 3. French Curve
Q.10 Which of the following statements is correct about a protractor?
Statements:
1. A protractor can be used to measure angles from both sides.
2. A protractor is typically made of a rigid metal material.
1. Neither statement is true
2. Only statement 1 is true
3. Only statement 2 is true
4. Both statements are true
Ans- 2. Only statement 1 is true
Q.11 A cylinder head gasket is incorporated between which of the following two parts of the engine?
1. Puppet valve and cylinder block
2. Cylinder block and cylinder head
3. Piston ring and cylinder head
4. Cylinder head and water jacket
Ans- 2. Cylinder block and cylinder head
Q.12 What does SCR stand for in the diesel exhaust treatment?
1. Solid Catalytic Reduction
2. Selective Catalytic Reduction
3. Standard Catalytic Reaction
4. Selective Carbon Reduction
Ans- 2. Selective Catalytic Reduction
Q.13 Which component assists the pneumatic governor of FIP in diesel engines?
1. Intercooler
2. Turbocharger
3. Exhauster
4. Fuel injector
Ans - 3. Exhauster
Q.14 The basic function of the connecting rod is to convert:
1. the linear motion of the crankshaft into rotary motion of piston
2. the reciprocating motion of piston to the rotary motion of the crankshaft
3. the reciprocating motion of piston head to the rotary motion of the camshaft
4. the curvilinear motion of piston to the linear motion of the camshaft
Ans - 2. the reciprocating motion of piston to the rotary motion of the crankshaft
Q.15 Which of the following parts of a dial bore gauge is used to hold all the components together and contains a mechanism for transmitting the plunger motion to the dial?
1. Anvil
2. Extension rings
3. Stem
4. Sliding plunger
Ans - 3. Stem
Q.16 What is the function of non-return valve (NRV) in a hydraulic system?
1. To increase system temperature
2. To control the viscosity of the fluid
3. To control the pressure in both directions
4. To allow flow in one direction
Ans- 4. To allow flow in one direction
Q.17 As per the SAE viscosity rating, which of the following numbers reflects thicker oil that better resists viscosity breakdown in the summer season?
1. 40W to 50W
2. 100W to 160W
3. −6W to −70W
4. 0W to 5W
Ans - 1. 40W to 50W
Q.18 Which of the following is an example of a p-type semiconductor?
1. Germanium doped with phosphorus
2. Silicon doped with arsenic
3. Silicon doped with boron
4. Silicon doped with phosphorus
Ans- 3. Silicon doped with boron
Q.19 Which of the following parts of an engine adjusts the opening times of the valves to suit all operating conditions and ensures ideal charge cycles within a wide range of engine speeds and loads?
1. Crank
2. Camshaft
3. Rocker arm
4. Crankshaft
Ans- 2. Camshaft
Q.20_______ is a type of spring that is often used as part of the vehicle clutch assembly, and its main function is to engage and disengage the pressure plate and the driven plate (clutch disk).
1. Diaphragm spring
2. Spiral spring
3. Laminated spring
4. Leaf spring
Ans- 1. Diaphragm spring
Q.21 Which of the following is a correct function of the indirect injection combustion chamber?
1. It accommodates the port (Inlet and Outlet) for In & Out of air.
2. It houses and guides the crankshaft.
3. It does not have properties to withstand temperature variations.
4. There is a confined space in it, in which the air and fuel mixtures are burned.
Ans- 4. There is a confined space in it, in which the air and fuel mixtures are burned.
Q.22 What does an optical pyrometer measure?
1. The pressure of gases
2. The temperature of the surface
3. The volume of liquids
4. The relative density of liquids
Ans- 2. The temperature of the surface
Q.23 In which part of the IC engine does a piston move during operation?
1. Cylinder head
2. Crankcase
3. Sump
4. Cylinder liner
Ans - 4. Cylinder liner
Q.24 A torsion bar is a steel bar operated by:
1. both tensile and compressive stresses
2. both compressive stress and twisting stress
3. both shear strain and longitudinal strain
4. both twisting and shear stresses
Ans - 4. both twisting and shear stresses
Q.25 What component blows air across the intercooler fins?
1. Exhaust fan
2. Engine cooling fan
3. Turbocharger
4. Air filter
Ans - 2. Engine cooling fan
Q.26 Which of the following is true for a given fixed compression ratio?
1. Dual cycle is the most efficient.
2. Otto cycle is the most efficient.
3. Diesel cycle is the most efficient.
4. Both Otto and Diesel cycles are equally efficient.
Ans-2. Otto cycle is the most efficient.
Q.27 A device operates at 240 V and consumes 480 W of power. What is the current flowing through the device?
1. 1A 2. 2.5A 3. 2A 4. 1.5A
Ans - 3. 2A
P= V x I watt
480 = 240 x I then I = 480 /240A = 2 ampere
Q.28 Final drive is the last stage of power transmission from the propeller shaft to rear axle sand then to the wheels. To which of the following angles does it turn the propeller shaft motion?
1. Equal and opposite angle to drive the rear axle
2. 45 degree angle to drive the rear axle
3.−45 degree to drive the front axle
4. Right angle to drive the rear axle
Ans-4. Right angle to drive the rear axle
Q.29 Identify the type of brazed joint shown below.
1. Butted Flange
2. Strapped Lap
3. Simple Lap
4. Joggle Lap
Ans- 3. Simple Lap
Q.30 Which of the following is a fundamental unit?
1. newton
2. watt
3. pascal
4. Metre
Ans - 4. Metre
Q.31 Which of the following types of valves is NOT used in the four-stroke engine?
1. Rotary valves
2. Poppet valves
3. Reed valves
4. Butterfly valves
Ans - 4. Butterfly valves
Q.32. Why are fins provided over the cylinder in air-cooled engines?
1. To increase cooling surface
2. To provide structural support
3. To reduce engine noise
4. For direct air flow
Ans- 1. To increase cooling surface
Q.33 What is the primary purpose of applying brakes in a vehicle?
1. To stop or slow down the vehicle
2. To improve fuel efficiency
3. To increase the speed of the vehicle
4. To open the fuel tank
Ans- 1. To stop or slow down the vehicle
Q.34 What type of bearing is fitted into the connecting rod, allowing the gudgeon pin to provide bearing for the oscillating small end of the connecting rod?
1. Journal bearing
2. Needle bearing
3. Tapper roller bearing
4. Ball bearing
Ans- 2. Needle bearing
Q.35 As the piston moves up to create a compression force, which of the following parts movements leads to inlet valve closure in engine?
1. Helical spring movement
2. Crankshaft movement
3. Camshaft movement
4. Connecting rod movement
Ans- 3. Camshaft movement
Q.36 A type of chamber in which the combustion space is essentially a single cavity with little restriction on one part of the chamber to the other, and hence with no large difference in pressure between parts of the chamber during the combustion process is known as:
1. air-cell combustion chamber
2. open combustion chamber
3. pre-combustion chamber
4. shallow depth combustion chamber
Ans- 2. open combustion chamber
Q.37 Which of the following types of wooden mallets are used for general purpose work such as flattening and bending?
1. End-faked mallets
2. Bossing mallets
3. Standard wooden mallets
4. Side-faked mallets
Ans -3. Standard wooden mallets
Q.38 The exhaust gases in a two-stroke engine is driven out by:
1. fresh charge of fuel entering the cylinder nearly at the end of the compression stroke
2. fresh air entering the casing nearly at the end of the suction stroke
3. left out charge of fuel from exhaust entering the cylinder nearly at the end of the working stroke
4. fresh charge of fuel entering the cylinder nearly at the end of the working stroke
Ans- 4. fresh charge of fuel entering the cylinder nearly at the end of the working stroke
Q.39 Which of the following statements is/are correct?
Statement I - The annealing process uses heat to reduce the hardness and increase theductility and toughness of various steels, cast iron, and alloys.
Statement II - Quenching is a rapid cooling process that alters specific properties of materials by manipulating the cooling rate. 1. Statement (I) and (II) both are correct.
2. Statement (I) is incorrect but Statement (II) is correct.
3. Statement (I) is correct but Statement (II) is incorrect.
4. Statement (I) and (II) both are incorrect.
Ans- 1. Statement (I) and (II) both are correct.
Q.40 Which of the following statements is correct about a diesel cycle and its air standard efficiency with respect to the compression ratio?
1. The air standard efficiency of a diesel cycle increases with the increase in the compression ratio.
2. The air standard efficiency decreases with the increase in the compression ratio.
3. The maximum compression ratio for the diesel engine is limited by detonation.
4. For a given compression ratio, Otto cycle is the least efficient while the diesel cycle is the most efficient.
Ans- 1. The air standard efficiency of a diesel cycle increases with the increase in the compression ratio.
Q.41 Which of the following methods is implemented for locking a semi floating type piston pin?
1. Gluing
2. Screw
3. Welding
4. Riveting
Ans- 2. Screw
Q.42 Why do diesel engines generally produce more noise, vibration, and harshness (NVH)compared to petrol engines?
1. Due to lower combustion temperature
2. Due to simpler combustion method
3. Due to less efficient fuel usage
4. Due to rapid combustion pressure and high pressure
Ans- 4. Due to rapid combustion pressure and high pressure
Q.43 Which of the following types of shafts allows easy implementation of a 4 valve per cylinder configuration?
1. Crankshaft of multicylinder engine setup
2. Single overhead cam setup
3. Dual overhead cam setup
4. Cam and follower rocker arm setup
Ans- 3. Dual overhead cam setup
Q.44 In engineering drawing (lettering and numbering), a single stroke means that the_______________.
1. thickness of the line of the letter or number is obtained in three strokes of the pencil
2. thickness of the line of the letter or number is obtained in one stroke of the pencil
3. thickness of the line of the letter or number is obtained in two strokes of the pencil
4. thickness of the line of the letter or number is obtained in no strokes of the pencil
Ans-2. thickness of the line of the letter or number is obtained in one stroke of the pencil
Q.45 Which of the following is a cause of high oil consumption in the engine cylinder?
1. Blocked oil strainer
2. Oil reaching to combustion
3. High oil level in the sump
4. Worn out oil pump gear
Ans- 2. Oil reaching to combustion
Q.46 Which of the following uses of wire gauge is INCORRECT?
1. It does not help determine how much current a wire can carry.
2. It is used in electrical installations, welding and other applications.
3. Using the wrong wire gauge can damage appliances and electronic devices.
4. It measures the diameter of a wire.
Ans- 1. It does not help determine how much current a wire can carry.
Q.47 The distance a cam lobe rises away from the base circle of the camshaft is known as:
1. rocker arm lift
2. lobe lift
3. mushroom valve lift
4. gross lift
Ans-2. lobe lift
Q.48 What is the chemical effect that occurs in a battery during the charging process of a Lead Acid battery?
1. Water dissociation into hydrogen and oxygen
2. Lead sulphate decomposes into lead and sulphuric acid
3. Sulphuric acid dissociates into hydrogen and sulphate ions
4. Lead reacts with sulphur to form lead sulphate
Ans- 2. Lead sulphate decomposes into lead and sulphuric acid
Q.49 A constant mesh gearbox usually comes with how many manual transmission configurations?
1. It comes with a 6-speed 1-reverse manual transmission configuration.
2. It comes with a 3-speed 1-reverse manual transmission configuration.
3. It comes with a 5-speed 1-reverse manual transmission configuration.
4. It comes with a 4-speed 1-reverse manual transmission configuration.
Ans- 4. It comes with a 4-speed 1-reverse manual transmission configuration.
Q.50 What conditions lead to the formation of oxides of nitrogen during combustion in the exhaust gases of an IC engine?
1. High temperature and low pressure
2. Low temperature and low pressure
3. Low temperature and high pressure
4. High temperature and high pressure
Ans- 4. High temperature and high pressure
Q.51 Which of the following types of engines has irregular operation that occurs because the amount of fresh mixture entering the cylinder is not enough to clear all the exhaust gases and a part of it remains in the cylinder to contaminate the charge?
1. Two-stroke diesel engine
2. Two-stroke petrol engine
3. Four-stroke diesel cycle
4. Four-stroke petrol engine
Ans- 2. Two-stroke petrol engine
Q.52 Which of the following is a key advantage of using Thyristors in power control applications?
1. High efficiency and low power loss
2. Low voltage handling capabilities
3. High frequency switching
4. Small size and low cost
Ans-3. High frequency switching
Q.53 Why are metal dispersants or detergents used as additives in lubrication oil?
1. These are used to control viscosity index and wax formation throughout the system at high temperature
2. These are used to control deposit formation throughout the system
3. These are used to control the formation of sedimentation of particles throughout the system
4. These are used to control bubbles formation and mist throughout the system
Ans- 2. These are used to control deposit formation throughout the system
Q.54 Which of the following statements is NOT correct about the steering system in vehicles?
1. It should minimise the turning effort applied on the steering wheel by the driver by use of overdamped damper.
2. It should multiply the turning effort applied on the steering wheel by the driver.
3. It should not transmit the shocks of the road surface encountered by wheels to the driver hands.
4. The function of the steering system is to convert the rotary movement of the steering wheel into the angular turn of the front wheels.
Ans- 1. It should minimise the turning effort applied on the steering wheel by the driver by use of overdamped damper.
Q.55 How does the EGR valve help control NOx formation and engine knock?
1. By limiting the exhaust flow
2. By adding exhaust gas to the intake mixture
3. By raising the intake air temperature
4. By improving the fuel injection timing
Ans- 2. By adding exhaust gas to the intake mixture
Q.56 What should be done if the starter motor pinion gear teeth are worn out?
1. Repair the pinion.
2. Tighten the starter motor mounting.
3. Clean the plunger contact point
4. Replace the pinion.
Ans- 4. Replace the pinion.
Q.57 In engineering drawing, what is defined as the path of a moving point with no thickness?
1. Point
2. Line
3. Curve
4. Angle
Ans- 2. Line
Q.58 Which of the following types of wooden mallets are used for hollowing panel beatings?
1. Bossing mallets
2. End-faked mallets
3. Standard wooden mallets
4. Side-faked mallets
Ans- 1. Bossing mallets
Q.59 What is waste?
1. Unwanted or unusable materials
2. Natural resources for living organisms
3. Useful materials for industries
4. Valuable substances for
Ans- 1. Unwanted or unusable materials
Q.60 Pencils are rated in engineering drawings based on the ______.
1. hardness or softness of the lead
2. colour of the lead
3. shape of the lead
4. durability of the lead
Ans - 1. hardness or softness of the lead
Q.61 Why is it important to follow proper disposal procedures for industrial waste? औद्योगिक अपशिष्ट के लिए उचित निपटान प्रक्रियाओं का पालन करना क्यों महत्वपूर्ण है?
1. अपशिष्ट को कहीं भी विघटित होने देने के लिए [To allow the waste to decompose]
2. कचरे के वर्गीकरण में लगने वाले समय और आयास को बचाने के लिए [To save time and effort spent in waste sorting]
3. आवश्यक कचरा डिब्बों की संख्या को कम करने के लिए [To reduce the number of dustbins needed]
4. पर्यावरण नियमों का पालन करने के लिए तथा प्रदूषण को कम करने के लिए [To comply with environmental regulations and reduce pollution]
Ans- 4. पर्यावरण नियमों का पालन करने के लिए तथा प्रदूषण को कम करने के लिए [To comply with environmental regulations and reduce pollution]
Q.62 How is the alternating current (AC) converted to direct current (DC) in an alternator?
1. Using a transformer
2. Using a capacitor
3. Using silicon diodes
4. Using an inverter
Ans- 3. Using silicon diodes
Q.63 What is the blade length of the T1 'T' square, as per IS:1360-1989?
1. 700 mm
2. 500 mm
3. 1500 mm
4. 1000 mm
Ans- 4. 1000 mm
Q.64 Which of the following is NOT a correct statement about the torsion spring?
1. This spring provides very neat and compact design.
2. It takes the driving or braking torque, and additional link mechanisms are not required for this purpose.
3. It is lighter than leaf spring system.
4. This spring needs less space.
Ans- 2. It takes the driving or braking torque, and additional link mechanisms are not required for this purpose.
Q.65 What happens when the brake pedal is pressed in a pedal-assisted type brake?
1. The power cylinder is activated.
2. The engine shuts down.
3. The accelerator is engaged.
4. The clutch is released.
Ans- 1. The power cylinder is activated.
Q.66 Which of the following is the key difference between a fuse and a circuit breaker?
1. A fuse is used for high-voltage circuits, while a circuit breaker is used for low-voltage circuits.
2. A fuse is a one-time-use device, while a circuit breaker can be reset and reused.
3. A fuse can be reset after tripping, while a circuit breaker must be replaced.
4. A fuse is a mechanical device, while a circuit breaker is an electronic device.
Ans- 2. A fuse is a one-time-use device, while a circuit breaker can be reset and reused.
Q.67 What force (effort) will be required to push a load, initially at rest, of mass 500 g, so that at a distance of 20 m, its final velocity is 20 m/sec [Assume that there is no friction and ‘g’ = 10 m/s2].
1. 10N 2. 5N 3. 10J 4. 5J
Ans- 2. 5N
Q.68 What is the role of baffles in the fuel tank?
1. To store more fuel
2. To minimise fuel slushing
3. To filter impurities
4. To indicate fuel level
Ans- 2. To minimise fuel slushing
Q.69. _____ brakes are a type of brake in which the fluid from the master cylinder is forced into a caliper where it presses against a piston. The piston in turn squeezes two brake pads against the disc (rotor), which is attached to wheel, forcing it to slow down or stop.
1. Electrical
2. Vacuum
3. Drum
4. Disk
Ans- 4. Disk
Q.70 If the coefficient of linear expansion of a material is 2 × 10-5 °C-1, what does it mean?
1. The material expands by 2 × 10-5 times its original volume per degree Celsius
2. The material expands by 2 × 10-5 times its original length per degree Celsius
3. The material always increases by 2 × 10-5 kg when temperature is increased by 1°C
4. The material expands by 2 × 10-5 times its original area per degree Celsius
Ans- 2. The material expands by 2 × 10-5 times its original length per degree Celsius
Q.71 Which of the following statements correctly describes the placement and purpose of orientation marks on a drawing sheet?
1. Orientation marks are placed at two opposite corners of the drawing sheet to indicate the correct orientation on the drawing board.
2. Orientation marks consist of arrow heads placed across the frame, with one at the shorter side and one at the longer side, coinciding with the centre ring marks.
3. One of the orientation marks always points towards the draughtsman, indicating the direction in which the drawing sheet should be placed.
4. Orientation marks are used to mark the midpoint of each side of the drawing sheet for accurate cantering.
1. 1 and 4 only
2. 2 and 3 only
3. 1, 2, and 4 only
4. 1, 2, and 3 only
Ans- 2. 2 and 3 only
Q.72 What do the SAE viscosity rating numbers denote, such as 0W or 5W?
1. Denotes thicker oil that better resists viscosity breakdown when hot
2. Easier oil flow for cold starting
3. Denotes thicker oil that better resists viscosity breakdown when cold
4. High viscosity oil and difficult flow for cold starting
Ans- 2. Easier oil flow for cold starting
Q.73 Which of the following punches is used to make deeper witness marks on scribed line sand make it easier for the drill to start correctly?
1. Pin punch
2. Prick punch
3. Centre punch
4. Solid punch
Ans- 3. Centre punch
Q.74 What component in an adjustable flow control (throttle) valve controls the flow?
1. Ball poppet
2. Check valve
3. Needle-shaped plunger
4. Spring-loaded piston
Ans- 3. Needle-shaped plunger
Q.75 Which of the following parts of a hammer-head is used for shaping and forming work like riveting and bending?
2. Cheek
3. Pein
4. Face
Ans- 3. Pein
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
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