All India Trade Test – 2024

Mechanic Consumer Electronic Appliances – Second Year

Question Paper – Set 3

Total Marks: 150 | Total Questions: 75 | Marks per Question: 2

Part 1: Trade Theory (Questions 1–38)

Question 1. What is the maximum delay that can be obtained using a single 8051 microcontroller timer operating at a frequency of 12 MHz?

1. 8192 microseconds
2. 16384 microseconds
3. 32768 microseconds
4. 65536 microseconds

Question 2. Which electronic component is connected to pins 18 and 19 of the IC 8051 microcontroller?

1. Sensor
2. Crystal
3. Resistor
4. Zener diode

Question 3. What is the full form of CISC used in microcontrollers?

1. Complete Instruction Set Computer
2. Compact Instruction Set Computer
3. Complex Integer Set Computer
4. Complex Instruction Set Computer

Question 4. What is a microcontroller used for?

1. Small systems
2. Large and complex systems
3. General-purpose systems
4. Automatically controlled devices

Question 5. Which device was developed to overcome the limitations of a microprocessor?

1. JFET
2. MOSFET
3. IGBT
4. Microcontroller

Question 6. What is the temperature measurement range using a thermocouple?

1. 4°C to 100°C
2. 101°C to 250°C
3. 270°C to 3000°C
4. 3001°C to 3500°C

Question 7. What is the full form of RTD, which is used as a sensor?

1. Remote Transistor Detector
2. Repulsion Type Detector
3. Reluctance Transmitter Detector
4. Resistance Temperature Detector

Question 8. What is the maximum temperature of a platinum RTD device?

1. 500°C
2. 650°C
3. 800°C
4. 950°C

Question 9. What is the name of the device shown in the figure?

1. Thermistor
2. Strain gauge
3. Inductive transducer
4. Temperature detector

Refer to page 3 of the original PDF for the figure.

Question 10. Which of the following acts as an active transducer?

1. Thermocouple
2. Potentiometer
3. Dielectric gauge
4. Variable capacitance pressure gauge

Question 11. What is the function of a load cell?

1. To convert force into linear motion
2. To convert force into light rays
3. To convert force into mechanical vibrations
4. To convert force into an electrical signal

Question 12. Which sensor is suitable for measuring the process temperature of steel?

1. Thermistor
2. Strain gauge
3. Thermocouple
4. Capacitive transducer

Question 13. Which sensor detects the presence of objects without physical contact?

1. LVDT
2. Load cell
3. Strain gauge
4. Proximity sensor

Question 14. What is the main function of a transducer?

1. To amplify the input signal
2. To modify the input signal
3. To convert the primary signal into an electrical impulse
4. To encode the input signal

Question 15. Which of the following is an active transducer?

1. Strain gauge
2. Thermistor
3. LVDT
4. Thermocouple

Question 16. Which type of transducer is self-generating?

1. Active transducer
2. Passive transducer
3. Secondary transducer
4. Analog transducer

Question 17. Which of the following is an analog transducer?

1. Encoder
2. Strain gauge
3. Digital tachometer
4. Limit switch

Question 18. What is the operating principle of an LVDT?

1. Mutual induction
2. Self-induction
3. Permeance
4. Reluctance

Question 19. Which quantities can an electrical strain gauge measure changes in?

1. Resistance, capacitance and inductance
2. Resistance only
3. Capacitance only
4. Inductance only

Question 20. Which core material is used for the windings of an LVDT?

1. Steel laminations
2. Aluminium
3. Ferrite
4. Copper

Question 21. What type of transducer is a strain gauge?

1. Active transducer
2. Passive transducer
3. Discrete transducer
4. Inverse transducer

Question 22. What is the purpose of sampling in the operation of a DSO?

1. To control the time-base signal
2. To convert an analog signal into digital form
3. To convert a digital signal into analog form
4. To display the signal on the screen

Question 23. How does a digital instrument process samples of an input voltage?

1. It generates a fixed output voltage
2. It generates a continuously variable voltage
3. It generates a continuously variable current
4. It converts them into binary numbers

Question 24. What is the full form of SOIC?

1. Surface Optimised Internal Circuits
2. Small Outline Integrated Circuits
3. Service Outline Internal Circuits
4. Solder Oriented Integrated Circuits

Question 25. What is the name of the IC package shown in the figure?

1. CQFP
2. PQFP
3. BQFP
4. LQFP

Refer to page 7 of the original PDF for the IC package figure.

Question 26. Which technology is used to mount components directly onto a printed circuit board?

1. Solder Mount Technology
2. Surface Mount Technology
3. Safety Metaphor Technology
4. Silicon Multilayer Technology

Question 27. What is the current rating of the cartridge fuse used in domestic wiring?

1. 1250 amperes
2. 1350 amperes
3. 1450 amperes
4. 1550 amperes

Question 28. What is the audio-frequency range used in communication?

1. 20 Hz to 20 kHz
2. 30 kHz to 400 kHz
3. 452 kHz to 455 kHz
4. 550 kHz to 1600 kHz

Question 29. Which device is used to convert a physical quantity into a corresponding electrical signal?

1. Amplifier
2. Transducer
3. Oscillator
4. Modulator

Question 30. What is potential difference?

1. Measurement of electrical power
2. Measurement of electric current
3. Measurement of voltage at a point
4. Comparison of the EMFs of two sources

Question 31. Which type of strain gauge is commonly used for measurement?

1. Open type
2. Closed type
3. Unbonded type
4. Bonded type

Question 32. What are self-generating transducers called?

1. Active
2. Passive
3. Inverse
4. Secondary

Question 33. Which of the following is a digital transducer?

1. Strain gauge
2. Thermistor
3. Encoder
4. LVDT

Question 34. What type of transducer is a thermistor?

1. Resistive transducer
2. Inductive transducer
3. Capacitive transducer
4. Discrete transducer

Question 35. Which transducer requires an external electrical source to produce an output signal?

1. Active
2. Variable
3. Thermo
4. Passive

Question 36. If an inverter has a power rating of 500 VA and a power factor of 0.9, what is its power capacity?

1. 450 watts
2. 55 watts
3. 4500 watts
4. 45 watts

Question 37. Which device is used for very fast switching in electrical power systems?

1. STS as a switch
2. SCS as a switch
3. SCR as a switch
4. SUS as a switch

Question 38. What is the level of total harmonic distortion of current (THDI)?

1. 10–25%
2. 25–30%
3. 30–50%
4. 0–10%

Part 2: Workshop Calculation and Science (Questions 39–44)

Question 39. What is the method of calculating various quantities and expenses for a particular job or process called?

1. Estimation
2. Drawing
3. Specification
4. Plan

Question 40. Who publishes the Schedule of Rates?

1. An individual
2. A corporate organisation
3. A partnership firm
4. A government department

Question 41. What is a booklet containing the rates of various items or works called?

1. Price bank
2. Price bunch
3. Price tag
4. Price catalogue

Question 42. What is the use of engineering drawings?

1. To estimate materials and execute work
2. To improve colour appearance
3. To reduce costs
4. To increase costs

Question 43. What is another name for a pocket reference used in engineering work?

1. Hand tool
2. Handbook
3. Good book
4. New book

Question 44. Who prepares a cost estimate?

1. Operator
2. Quality inspector
3. Estimator
4. Draftsman

Part 3: Engineering Drawing (Questions 45–50)

Question 45. What type of switch is shown in the figure?

1. Preset resistor
2. Loudspeaker
3. Slide type
4. Coaxial connector

Refer to page 12 of the original PDF for the figure.

Question 46. Which of the following is the symbol of a capacitor?

1. Figure A
2. Figure B
3. Figure C
4. Figure D

Refer to pages 12–13 of the original PDF for the component symbols.

Question 47. What does the symbol shown in the figure represent?

1. AC supply
2. Loudspeaker
3. Microphone
4. Meter

Refer to page 13 of the original PDF for the symbol.

Question 48. Which switch is represented by the symbol shown in the figure?

1. SPDT switch
2. SPST switch
3. DPDT switch
4. DPST switch

Refer to pages 13–14 of the original PDF for the symbol.

Question 49. Which of the following is the symbol of a diode?

1. Figure A
2. Figure B
3. Figure C
4. Figure D

Refer to page 14 of the original PDF for the diode symbols.

Question 50. Which of the following figures represents a NOT gate?

1. Figure A
2. Figure B
3. Figure C
4. Figure D

Refer to pages 14–15 of the original PDF for the logic gate figures.

Part 4: Employability Skills (Questions 51–75)

Question 51. Which is an example of an informal situation within the workplace?

1. Working with files
2. Working on a desktop computer
3. Working on a laptop
4. Eating in the office canteen

Question 52. What are the benefits of informal communication at the workplace?

1. It helps people work better together
2. It makes everything more official
3. It creates a strict work environment
4. It allows people to talk less

Question 53. Which is an appropriate question to ask during an informal conversation with a colleague?

1. Asking about their role in the company
2. Asking about their home
3. Asking about their experience
4. Asking about office timings

Question 54. If a colleague asks for help with a task, what is an appropriate response?

1. “How can you not know this?”
2. “I am very busy right now.”
3. “Sure, I can help. What do you need?”
4. Ask them to send a formal request by email

Question 55. What is workplace etiquette?

1. Everyday etiquette outside work
2. Appropriate behaviour and professionalism at the workplace
3. Informal behaviour with colleagues
4. Gossiping

Question 56. Which of the following is considered appropriate behaviour at the workplace?

1. Regularly arriving late for work
2. Interrupting others during meetings
3. Speaking loudly on the phone
4. Maintaining a clean workplace

Question 57. Which is one of the good workplace practices?

1. Keeping the workplace clean and tidy
2. Speaking loudly on the phone
3. Repeatedly tapping on the desk
4. Not arriving at the office on time

Question 58. Which action demonstrates proper workplace etiquette during an official meeting?

1. Checking the phone and replying to messages
2. Chatting with colleagues
3. Interrupting the speaker
4. Keeping the phone on silent mode and actively participating in the discussion

Question 59. What should you do if colleagues are gossiping about another colleague?

1. Recognise that gossip is inappropriate workplace behaviour
2. Join the conversation and continue the gossip
3. Tell another colleague about the gossip
4. Continue listening to the gossip

Question 60. Which statement demonstrates good teamwork?

1. Keeping all ideas to yourself
2. Criticising the efforts of teammates
3. Working together towards a common goal
4. Ignoring the ideas and opinions of others

Question 61. What is necessary for teamwork?

1. Proper communication
2. Money
3. Conflicts and arguments
4. Easy tasks

Question 62. When working on a project with teammates, which behaviour demonstrates that you are a good team member?

1. Getting angry when others do not listen
2. Sharing ideas to help the team work faster
3. Thinking that you never make mistakes
4. Not listening to teammates' ideas and opinions

Question 63. Your team has successfully completed a challenging project. How should you celebrate the success?

1. Claim that you did everything and avoid praising others
2. Blame the group for any mistakes
3. Start the next task without celebrating
4. Thank all group members for their help

Question 64. If a teammate is having difficulty completing an assigned task, what should you do?

1. Ignore the difficulty and focus on your own work
2. Help and support them in completing the task
3. Criticise them for being inefficient
4. Complain to a senior officer about their lack of contribution

Question 65. What can be affected by rapid changes in technology?

1. The future of work
2. The nature of work
3. The workforce
4. Working capital

Question 66. Which method can help improve your technical skills?

1. Handicrafts
2. Reading books
3. Social service
4. Using social media and online digital tools

Question 67. What is the gig economy?

1. A work arrangement in which people work part-time or temporarily
2. The Indian economy
3. The foreign economy
4. Regular employment

Question 68. What is a good way for gig workers to find jobs?

1. Employment office
2. Online platforms and apps
3. Employment newspapers
4. Placement cell

Question 69. Which of the following is an example of a self-employment idea?

1. Freelance tailoring service
2. Owning a boutique
3. Home catering service
4. All of the above

Question 70. What does migration for work mean?

1. Relocating an industry
2. Moving to another place to find a job
3. Changing one's occupation
4. Working different shifts

Question 71. Which important factor should be considered before migrating?

1. Easy work
2. Tourist destinations
3. Cost of living
4. Freedom

Question 72. What is Skill India Digital?

1. A digital film
2. A platform for learning and career resources
3. A central government office
4. The name of a trade

Question 73. What does creating a digital CV and sharing it with a QR code represent?

1. Your digital identity
2. Digital marketing
3. Entrepreneurship
4. Interview skills

Question 74. What does separating paper and plastic from organic waste before disposal demonstrate?

1. Creativity
2. Green mindset
3. Innovation
4. Occupation

Question 75. Which is a good practice for maintaining a green mindset?

1. Taking many printouts
2. Using air conditioning all the time
3. Keeping lights switched on all the time
4. Separating and recycling waste

Answer Key

The following answers reproduce the answer key provided with the source question paper.

Note: Questions 9, 25 and 45–50 depend on figures or symbols. Refer to the corresponding pages of the original PDF to match the options accurately. Treat the original PDF as the final reference if any printing or answer-key error is suspected.