IGCSE Design & Technology (0445) — May–June 2023, Paper 42

Identify two fossil fuels from the list below. List: coal, geothermal, hydroelectric, natural gas, solar.

Give two reasons why many products are designed with a limited lifetime.

Name the types of structure shown in Fig. 3.1 (reservoir overflow steps; a 5-section telescopic jib; an extension jib on a mobile crane).

Fig. 4.1 shows a beam that will be used in a structure. Name the forces acting on the beam indicated by the arrows A and B in Fig. 4.1.

Fig. 5.1 shows a mechanism made up of different linkages (link C, link D, and a crank). (a) State the type of motion of link C when the crank is turned.

Fig. 6.1 shows two spur gears, a 24 t drive gear meshing with a 24 t gear. State two results of rotating the drive gear in the direction shown.

Name the electronic symbols shown in Fig. 7.1 (three symbols).

Fig. 8.1 shows a toggle switch. (a) Describe the function of a toggle switch used to control a light.

The list below shows abbreviations for multiple and sub-multiple units of capacitance: F, pF, microF, nF. Arrange the units in Table 9.1 in order of size, from smallest to largest.

(a)(i) State two design features that ensure the trestle is safe and secure.

(a) Fig. 11.1 shows part of a bicycle chain with four positions identified (A, B, C, D). (a)(i) Give the two positions on Fig. 11.1 where lubrication should be applied.

(a) Fig. 12.1 shows a rechargeable cycle light which uses 3 high intensity LEDs. (a)(i) Give two benefits of using LEDs for the cycle light.