A-Level Design and Technology

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Questions and Answers

What is the purpose of the Safety Guard in the laser cutter?

To ensure the machine only operates when the extraction system is on (correct)

To monitor the temperature of the laser cutter

To operate the extraction system

To turn off the laser cutter when the extraction system is off

What is the advantage of using ICs with NAND gates over those with AND, OR, and NOT gates?

They can perform more complex logic operations

They take up less space on the circuit board

They are more versatile and can be used in a wider range of applications (correct)

They are cheaper to produce

What is the output of a NAND gate when both inputs are 1?

0 (correct)

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either 0 or 1

What is the purpose of the gear train in the metal turning lathe?

To drive the headstock of the lathe Signup and view all the answers

How can each gear be secured to its shaft?

By using a keyway and key Signup and view all the answers

What is the Velocity Ratio (VR) calculated for in the compound gear train?

To find the rotational velocity of the driver gear Signup and view all the answers

What is the primary purpose of morphological analysis and reverse engineering in the development of new products?

To analyze and improve existing products Signup and view all the answers

What is the benefit to the client of using CAD and CAM to produce bespoke custom made products?

Customization to meet specific needs Signup and view all the answers

What is the function of piezoelectric transducers in electronic products?

To convert mechanical energy into electrical signals Signup and view all the answers

What is the advantage of using iterative development processes in product design?

Refining and improving the product design through multiple prototypes Signup and view all the answers

What is the primary benefit of using electronic products that interact with the environment?

Improved performance Signup and view all the answers

What is the purpose of revitalizing traditional products?

To modernize and improve the product design Signup and view all the answers

What is the primary purpose of the mobility scooter seat adjustment system?

To accommodate users of varying sizes Signup and view all the answers

What is the voltage of the motor used to power the mobility scooter?

24 Volt Signup and view all the answers

What type of transistor is used in the circuit to control the 5 Volt motor?

Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) Signup and view all the answers

What is the purpose of the relay switch in the modified circuit?

To link the 5 Volt microcontroller circuit to a 24 Volt Motor Signup and view all the answers

Why would the mobility scooter require further modifications for severely disabled people?

To improve its accessibility features Signup and view all the answers

What is the primary reason for designing a seat adjustment system in the mobility scooter?

To accommodate users of varying sizes Signup and view all the answers

Study Notes

Laser Cutter Safety

The laser cutter should not operate until the Safety Guard has been closed and the extraction system has been turned on.
A Quad Input AND gate integrated circuit (IC) can be used to ensure that the machine will not operate until two sensors have been activated.

ICs in Preference

ICs that contain NAND gates are often used in preference to those that contain AND, OR, and NOT gates.

NAND Gate

A NAND gate has a truth table with the following inputs and outputs:
- Input A: 0, Input B: 0, Output Q: 1
- Input A: 0, Input B: 1, Output Q: 1
- Input A: 1, Input B: 0, Output Q: 1
- Input A: 1, Input B: 1, Output Q: 0

Compound Gear Train

A compound gear train is used to drive the headstock of a metal turning lathe.
The Velocity Ratio (VR) and Rotational Velocity (RV) can be calculated for the gear train.
Each gear needs to be secured to its shaft to prevent slipping when subjected to a rotational force.

Gear Securing

Gears can be secured to their shafts using a mechanism that prevents rotational force from causing slipping.

Design and Technology

Design and technology processes involve iterative development, morphological analysis, and reverse engineering.
Morphological analysis and reverse engineering can benefit the iterative development process.
Computer Aided Design (CAD) and Computer Aided Manufacture (CAM) can be used to produce bespoke custom-made products.

Bespoke Products

The advantages of using CAD and CAM to produce bespoke products include benefits to the client and manufacturer.

Piezoelectric Transducers

Piezoelectric transducers can be used to measure changes in pressure, acceleration, temperature, strain, or force by converting signals into an electrical charge.
This technology can be used to improve the performance of products such as humanoid robots and voice-controlled smart speakers.

Mobility Scooter

The design of a modern mobility scooter can be analysed based on specification points.
A mechanical system can be designed to allow the seat of a mobility scooter to be easily adjusted and securely locked in position.
A 24 Volt DC motor can be controlled by outputs from a Microcontroller using a MOSFET Transistor or relay switch.
The mobility scooter can be modified for use by more severely disabled people.

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Description

Test your knowledge of engineering design with this A-Level Design and Technology quiz, covering topics such as design principles, materials, and manufacturing processes. This quiz is based on the AS Unit 1 exam and is suitable for students preparing for the exam.