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 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 RAC 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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RRB ALP Refrigeration and Air Conditioning Mechanic CBT-2 (PART-B) |
02.05.2025 SHIFT-I |
75 Q |
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RRB ALP 2nd Stage CBT Question for RAC (CEN-01/2024)
CBT 2 Date - 02.05.2025, Time – 9:30 to 12:00 Morning (Shift-1)
TOTAL QUESTION–75 CBT-2 PART-B, I.T.I TRADE– RAC
Q.1 Ans Which of the following types of compressors has up to 10 cylinders and is most frequently used in car air-conditioning systems?
1. Wobble plate compressor
2. Scroll type compressor
3. Hermetic compressor
4. Swash plate compressor
Answer - 4. Swash plate compressor
Q.2 Read the given statements carefully and select the correct option.
Statement 1: In frost-free refrigerator, evaporator fan and condenser fan produces uniform cooling.
Statement 2: In conventional type refrigerator, no fan is provided hence the cooling is not uniform cooling/freezing.
1. Both Statement 1 and Statement 2 are correct.
2. Statement 1 is correct and Statement 2 is incorrect.
3. Statement 2 is correct and Statement 1 is incorrect.
4. Both Statement 1 and Statement 2 are incorrect.
Ans - 1. Both Statement 1 and Statement 2 are correct.
Q.3 Ans Which of the following hand-operated drilling machines is used for drilling small diameter holes up to 6 mm?
1. Electric hand drill
2. Bevel gear type drilling machine
3. Breast drilling machine
4. Ratchet drilling machine
Ans- 2. Bevel gear type drilling machine
Q.4 Which of the following is an important safety measure during a power failure?
1. Using candles for lighting
2. Ignoring alarm systems
3. Continuing to use equipment without verifying power status
4. Ensuring all machines and electrical equipment are turned off
Ans- 4. Ensuring all machines and electrical equipment are turned off
Q.5 Match the refrigerant control expansion valves with their correct functions.
Refrigerant controls
A. Suction-line regulators
B. Check valves
C. Solenoid valves
D. Hold back valves
Functions
P. Limit the flow of gas to the compressor to prevent s loads
Q. Interrupt the flow on demand from any one of sev temperature or pressure-sensing devices
R. Prevent the flow of gas from the condenser
S. Control the flow of refrigerant gas from the evapor Ans
1. A-S, B-P, C-Q, D-R
2. A-S, B-R, C-Q, D-P
3. A-S, B-R, C-P, D-Q
4. A-P, B-R, C-Q, D-S
Ans- 4. A-P, B-R, C-Q, D-S
Q.6 What is the primary reason for electrical injuries when a person comes in contact with electrical equipment?
1. Electrical devices are too powerful.
2. Electrical equipment is not properly grounded.
3. Current flows through the body causing harm.
4. Devices are used for too long.
Ans - 3. Current flows through the body causing harm.
Q.7 When using a multimeter to measure current, which of the following is correct?
1. The multimeter is connected in series with the load.
2. The multimeter is connected directly to the power source.
3. The multimeter is connected in parallel with the load.
4. The multimeter is connected only across resistive components.
Ans-1. The multimeter is connected in series with the load.
Q.8 In a refrigeration system, an electronic expansion valve is a _____.
1. device used to store heat during normal operation of the cycle
2. device used to remove the frost by melting
3. device used to measure the moisture content of the air
4. device that meters or regulates the flow of liquid refrigerant to the evaporator
Ans-4. device that meters or regulates the flow of liquid refrigerant to the evaporator
Q.9 Which of the following components of the flake ice machine is a vertically placed drum shaped stainless-steel container, equipped with the rotating blade?
1. Tube ice generator
2. Condenser
3. Evaporator
4. Compressor
Ans-3. Evaporator
Q.10 What should you do to ensure your personal safety at work?
1. Wear personal protective equipment.
2. Take risks to finish tasks quickly.
3. Ignore warning signs and instructions.
4. Work in a hurry without checking equipment.
Ans- 1. Wear personal protective equipment.
Q11. Which of the following components of a storage-type water cooler gives initial power for starting winding at the compressor needed and cuts off power supply at running?
1. Relay
2. Overload protector
3. Thermostat
4. Fan motor
Ans- 1. Relay
Q.12 Which of the following advantages of AC motor over DC motor is INCORRECT?
1. AC motors have higher startup power demands.
2. AC motors are more efficient than DC motors.
3. AC motors are more durable and have a longer life expectancy than DC motors.
4. AC motors have fewer moving parts than DC motors.
Ans- 1. AC motors have higher startup power demands.
Q.13 _________ is the process of adding moisture to the air without affecting its dry bulb temperature.
1. Humidification
2. De-humidification
3. Isothermal process
4. Adiabatic process
Ans- 1. Humidification
Q.14 In refrigeration and air conditioning systems, balance valves are also called the _____.
1. coil setter
2. circuit setter
3. circuit breaker
4. fan coil setter
Ans-2. circuit setter
Q.15 When selecting a sheet size for an original drawing, what should be the primary consideration?
1. The clarity and resolution required.
2. The orientation of the drawing (horizontal or vertical).
3. The size of the reproduction.
4. The standard size of the drawing office.
Ans- 1. The clarity and resolution required.
Q.16 What is the purpose of an emergency evacuation plan?
1. To ensure safe and orderly evacuation during emergencies
2. To increase productivity
3. To avoid safety drills
4. To allow workers to leave early
Ans- 1. To ensure safe and orderly evacuation during emergencies
Q.17 In the operations of a cold storage plant, ___________ is used to protect the plant components against unusual working conditions.
1. Safety control
2. Temperature control
3. Fluid control
4. Moisture control
Ans-1. Safety control
Q.18 In which of the following types of refrigeration system, a lighter gas compared to the refrigerant vapour is introduced into the system?
1. Liquid gas refrigeration system
2. Dry ice refrigeration system
3. Ice refrigeration system
4. Three fluid absorption system
Ans-4. Three fluid absorption system
Q.19 _______ exists when a system changes its state due to temperature difference between the system and its surroundings.
1. Work
2. Diffusion
3. Mass flow
4. Heat
Ans- 4. Heat
Q.20 In refrigeration systems, 'FCU' stands for _____.
1. Freezer Control Unit
2. Freezer Coil Unit
3. Fan Coil Unit
4. Fan Control Unit
Ans - 3. Fan Coil Unit
Q.21 In horizontal type bottle coolers, __________ air convection is present inside the storage cooling compartment.
1. forced
2. obligatory
3. natural
4. Neutral
Ans-3. natural
Q.22 Ans Which of the following are the two methods of charging refrigerants into systems?
1. Charging by specific volume and charging by diffusivity
2. Charging by density and charging by colour
3. Charging by weight and charging by volume
4. Charging by viscosity and charging by volume
Ans-3. Charging by weight and charging by volume
Q.23 Gaskets, seals and spacers are made using:
1. prick punch
2. pin punch
3. hollow punch
4. centre punch
Ans-3. hollow punch
Q.24 Which of the following types of pliers is used to shape loops in wires and to form curves in light metal strips?
1. Flat nose pliers
2. Round nose pliers
3. End cutting pliers
4. Slip-joint pliers
Ans-2. Round nose pliers
Q.25 A circuit consists of three resistors; 15 ohms, 10 ohms, and 20 ohms. The 15-ohm resistor is in series with the parallel combination of the 10-ohm and 20-ohm resistors. If a 24 V battery is applied across the circuit, what is the total current flowing through the circuit?
1. 0.1 A
2. 2.1 A
3. 1.1 A
4. 3.1 A
Ans- 3. 1.1 A
Q.26 In a velocity-time graph, the negative slope represents _____.
1. displacement
2. distance
3. acceleration
4. Retardation
Ans- 4. Retardation
Q.27 What are 'Thermal insulators' in Refrigeration and Air Conditioning systems?
1. Materials that retard or offer resistance to the flow of heat through it
2. Materials that retard or offer resistance to the friction
3. Materials that retard or offer resistance to the flow of air through it
4. Materials that retard or offer resistance to the flow of water through it
Ans- 1. Materials that retard or offer resistance to the flow of heat through it
Q.28 What is a refrigeration system?
1. The equipment employed to maintain a system at a low temperature.
2. The equipment employed to maintain a system at a high temperature.
3. The equipment employed to maintain a system at a high pressure.
4. The equipment employed to maintain a system at a low pressure.
Ans-1. The equipment employed to maintain a system at a low temperature.
Q.29 A circular hole of radius 3 cm is cut from a rectangular sheet of dimensions 12 cm × 10 cm. Find the remaining area. (Take π = 3.14)
1. 75.74 cm²
2. 91.74 cm²
3. 95.86 cm²
4. 100 cm²
Ans- 2. 91.74 cm²
Q.30 Which of the following is INCORRECT regarding the cleaning and care of split AC systems?
1. When removing and replacing the air filters, be sure to touch the heat exchanger
2. Be sure the intake grille is installed securely
3. Before cleaning the AC, be sure to turn it off and disconnect the power supply cord
4. After washing, allow it to dry thoroughly in a shaded place
Ans- 1. When removing and replacing the air filters, be sure to touch the heat exchanger
Q.31 What is a key advantage of using MOSFETs in electronic circuits compared to other types of transistors?
1. High frequency response
2. Ability to amplify both AC and DC signals
3. Ability to handle higher voltages and currents than BJTs
4. High input impedance and low power consumption
Ans- 4. High input impedance and low power consumption
Q.32 What is the some of (3/8) + (5/12) ?
1. 8/20
2. 17/24
3. 19/24
4. 7/12
Ans - 3. 19/24
Q.33 Which of the following files is used for filing narrow grooves and angles above 10°?
1. Square file
2. Knife-edge file
3. Half round file
4. Triangular file
Ans - 2. Knife-edge file
Q.34 A drawing instrument box is used to carry all ______________ instruments.
1. casting
2. screening
3. drilling
4. Drawing
Ans- 4. Drawing
Q.35 Which of the following organisations is responsible for enforcing workplace safety regulations in India?
1. Environmental Protection Agency (EPA)
2. Directorate General of Factory Advice Service and Labour Institutes (DGFASLI)
3. World Health Organization (WHO)
4. Food and Drug Administration (FDA)
Ans- 2. Directorate General of Factory Advice Service and Labour Institutes (DGFASLI)
Q.36 _____________ moves from one point to another through air in air conditioning systems.
1. Water borne sound
2. Structure borne sound
3. Refrigerent borne sound
4. Air borne sound
Answer- 4. Air borne sound
Q.37 Which of the following factors should be controlled in order to keep constant temperature throughout the conditioned space? 1. Motion of air
2. Humidity of air
3. Purity of air
4. Temperature of air
Ans -1. Motion of air
Q.38 In an automotive air conditioning system compressor, the pistons are operated by a ______, which moves them backwards and forwards in the cylinders.
1. wobble plate
2. crank shaft
3. connecting rod
4. gear plate
Ans-1. wobble plate
Q.39 What is the advantage of giving heat treatment to a material?
1. To make surgical knives of sharp edges
2. To decrease the melting point of the material
3. To increase the weight of the material
4. To change it from one element to another element
Ans-1. To make surgical knives of sharp edges
Q.40 The _______ device is used for producing cold in a refrigeration system.
1. condenser
2. economizer
3. manifold gauge tool
4. vortex tube
Ans- 4. vortex tube
Q.41 In which of the following types of cooling towers are the eliminators fitted just below the fan and spray nozzles fitted just below the eliminator?
1. Forced draft cooling tower
2. Induced draft cooling tower
3. Hyperbolic draft cooling tower
4. Natural draft cooling tower
Ans-2. Induced draft cooling tower
Q.42 In industrial air conditioning systems, a pipe line is provided from the condenser to the cooling tower to circulate _____.
1. chlorine
2. water
3. gas
4. Air
Ans-2. water
Q.43 Which of the following motors is used for condensing units and cooling coils of bottle coolers?
1. Squirrel cage induction motor
2. Shaded pole induction motor
3. Capacitor-start capacitor-run induction motor
4. Slip ring induction motor
Ans- 2. Shaded pole induction motor
Q.44 Which of the following processes of maintaining central AC always follows the detailed instructions provided by equipment manufactures or system designers?
1. Post start-up checks
2. Pre-start-up checks
3. Starting procedure
4. Log sheets
Ans-3. Starting procedure
Q.45 Which of the following electrical components is used in the refrigeration system to protect the compressor from abnormal operating condition?
1. Fan motor
2. PTC relay
3. Overload protector
4. Defrost heater
Ans- 3. Overload protector
Q.46 if SINƟ = 3/5, find COSƟ
1. 5/4
2. 3/4
3. 3/5
4. 4/5
Ans - 4. 4/5
Q.47 When measuring the resistance of a resistor using an ohmmeter, what does a reading of zero resistance indicate?
1. The resistor is open-circuited.
2. The ohmmeter is malfunctioning.
3. The resistor is functioning normally.
4. The resistor is short-circuited.
Ans -4. The resistor is short-circuited.
Q.48 For what purpose are pins and clips used in engineering drawings?
1. To transfer dimensions and dividing lines into a number of equal parts
2. To fasten the drawing sheet on to the drawing board firmly so that it does not shake
3. To draw horizontal lines, parallel lines and to guide/hold the set squares
4. To support the drawing paper/tracing paper for making drawings
Ans - 2. To fasten the drawing sheet on to the drawing board firmly so that it does not shake
Q.49 In a vapor compression system, the condensed liquid refrigerant from the condenser is stored in a vessel known as _______.
1. expansion valve
2. condenser
3. evaporator
4. Receiver
Ans- 4. Receiver
Q.50 Which of the following factors is responsible for the maintenance of any desired temperature within an enclosed space even though the temperature of the outside air is above or below the desired room temperature?
1. Temperature of air
2. Humidity of air
3. Motion of air
4. Purity of air
Ans-1. Temperature of air
Q.51 _______________ is a type of refrigerated cabinet that displays merchandise as well as cools it.
1. Undercounter cooler
2. Visible heater
3. Visible cooler
4. Hidden cooler
Ans- 3. Visible cooler
Q.52 According to BIS SP 46-2003, which of the following applications is correctly represented by a chain-thin line in engineering drawings?
1. Dimension lines
2. Visible edges
3. Center lines
4. Hidden edges
Ans -3. Center lines
Q.53 Which of the following vices consists of a handle and a small collet chuck at one end?
1. Pipe vice
2. Toolmaker’s vice
3. Hand vice
4. Pin vice
Ans-4. Pin vice
Q.54 In the refrigeration system, _____ refrigerants are the heat carriers that directly cool the material by absorbing latent heat.
1. primary
2. secondary
3. nitrogen
4. highly flammable
Ans - 1. primary
Q.55 Which of the following parts of a thermostatic expansion valve transmits the diaphragm force to spring to control the flow?
1. Super-heat spring
2. Push rod and ball valve
3. Body sealing gasket
4. Spring retainer
Ans- 2. Push rod and ball valve
Q.56 Which of the following parts of a file is the part fitted to the tang for holding the file?
1. Edge
2. Tip or Point
3. Tang
4. Handle
Ans - 4. Handle
Q.57 If the diameter of the bare tube coil evaporators is too small, then:
1. the system efficiency reduces
2. the pressure drop due to friction becomes zero
3. the pressure drop due to friction becomes too low
4. the system efficiency increases
Ans-1. the system efficiency reduces
Q.58 Which of the following components of a walk-in cooler is required on freezers to prevent drain line freeze up?
1. Condensate water evaporator
2. Drain line heater
3. Condenser unit rack
4. Heat ex-changer
Ans- 2. Drain line heater
Q.59 Non-functional dimensions are _______________.
1. directly derived from the values given on a drawing
2. essential for the function of the space or component
3. derived from the values of the related features of a drawing
4. not essential for the function of the space or component
Ans-4. not essential for the function of the space or component
Q.60 Why is it important for every person to follow safety procedures in the workplace?
1. To minimize risks and avoid accidents
2. To reduce operational costs significantly
3. To limit the need for frequent supervision
4. To increase overall production efficiency
Ans- 1. To minimize risks and avoid accidents
Q.61 The _____ in an air-conditioning system allows heat to flow from the hot refrigerant to the cooler outside air.
1. compressor
2. condenser
3. turbine
4. Evaporator
Ans-2. condenser
Q.62 Match the components in Column A with those in Column B.
|
Column A |
Column B |
|
Thermometer (A) |
Measuring solar intensity (P) |
|
Pyrometer (B) |
Measuring pressure (Q) |
|
Barometer (C) |
Measuring high temperatures (R) |
|
Pyrometer (D) |
Measuring ordinary temperatures (S) |
1. A-S, B-R, C-Q, D-P
2. A-S, B-Q, C-R, D-P
3. A-P, B-R, C-Q, D-S
4. A-Q, B-R, C-S, D-P
Ans- 1. A-S, B-R, C-Q, D-P
Q.63 In Duct Insulation of Refrigeration and Air-Conditioning, EPDM stands for ____________.
1. Ethylene Propylene Diene Material
2. Ethylene Propylene Diene Monomer
3. Ethylene Polymer Diene Monomer
4. Ethyl Propylene Dual Monomer
Ans- 2. Ethylene Propylene Diene Monomer
Q.64 In an air-conditioning system, butterfly dampers and multiple vane dampers are _____.
1. duct air-flow controls
2. condensers
3. duct water-flow controls
4. Evaporators
Ans-1. duct air-flow controls
Q.65 Which of the following components of an automotive AC system store refrigerant, filter particles, absorb moisture and separate vaporous R134a from liquid R134a?
1. Accumulator
2. Condenser
3. Evaporator
4. Compressor
Ans-1. Accumulator
Q.66 In a lead-acid battery, what is the chemical composition of the material used for the positive plate during discharge?
1. Lead (Pb)
2. Lead dioxide (PbO₂)
3. Sulphuric acid (H₂SO₄)
4. Lead sulfate (PbSO₄)
Ans- 2. Lead dioxide (PbO₂)
Q.67 ________ is the space where heat exchange takes place in direct expansion plants of Central Industrial Air Conditioning systems.
1. Air Handling Unit
2. Aerosol Handling Unit
3. Automotive Handling Unit
4. Automobile Handling Unit
Ans - 1. Air Handling Unit
Q.68 Which of the following parts of the softy machine admits and shuts the flow of an ice cream?
1. Churner shaft with conveyor
2. Ice cream outlet valve
3. Shaft bearing
4. Sight glass
Ans- 2. Ice cream outlet valve
Q.69 The liquid can get sub-cooled below the saturation temperature in the:
1. compressor
2. evaporator
3. expander
4. Condenser
Ans- 4. Condenser
Q.70 Arrange the following steps in the correct order to draw an equilateral triangle with each side of 35 mm.
1. Join CA and CB.
2. Draw a line and mark AB 35 mm as the side of the triangle.
3. With radius AB and center A and B, draw arcs cutting at C.
4. ABC is the required triangle.
1. 3, 2, 1, 4
2. 2, 1, 3, 4
3. 2, 3, 1, 4
4. 1, 2, 4, 3
Ans - 3. 2, 3, 1, 4
Q.71 What is the function of a condenser in air-conditioning systems?
1. Prevents chocking of cooling air
2. Picks up heat from return air
3. Blows the cool air to the duct
4. Rejects heat from refrigerant vapour and turns it to liquid
Ans- 4. Rejects heat from refrigerant vapour and turns it to liquid
Q.72 The unit for specific gravity is _____.
1. g/cm3
2. kg/m3
3. m/s2
4. no unit (dimensionless)
Ans- 4. no unit (dimensionless)
Q.73 Which of the following statements is/are correct about a commercial refrigeration system?
Statement 1: Condenser water inlet picks up heat from the gas so that it condenses.
Statement 2: Condenser water outlet connects hot water to the cooling tower.
1. Neither statement 1 nor statement 2 is correct.
2. Only statement 2 is correct.
3. Only statement 1 is correct.
4. Both statement 1 and statement 2 are correct
Ans- 4. Both statement 1 and statement 2 are correct
Q.74 If the current flowing through a conductor is 5 A and the resistance of the conductor is 10 ohms, what will be the voltage across the conductor, according to Ohm's Law?
1. 15 V
2. 50 V
3. 10 V
4. 5 V
Ans - 2. 50 V
Q.75 The low side component of the vapour compression refrigeration system, where the refrigerant absorbs heat by evaporating, is _______.
1. condenser
2. discharge line
3. suction line
4. compressor
Ans - 3. suction line
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
आप निम्नलिखित भाग MCQ पढ़ने के लिए नीचे का LINK क्लिक करें
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