IGCSE Design & Technology (0445) — October–November 2023, Paper 42

Fig. 1.1 shows part of the steel frame structure of an industrial building. State one reason for using triangulation in the steel frame structure.

Give two items of Personal Protective Equipment (PPE) that should be used on the building site.

Describe, using an example, the meaning of static load in a structure.

Sketch and name one example of a third order lever.

Fig. 5.1 shows a linkage used on a front loader truck. Name the type of linkage shown in Fig. 5.1.

Fig. 6.1 shows a simplified line drawing of a small internal combustion (IC) engine, with the cylinder, piston and crankshaft labelled. State the conversion of motion that takes…

Fig. 7.1 shows part of an electronic circuit (9 V supply with R1, VR1 and TR1). State the name of the components R1, VR1 and TR1 in the circuit.

Use sketches and notes to describe how a reed switch is operated.

Fig. 9.1 shows part of a model of a roof truss; joints at X and Y have been glued together. Name the force that will act on beam T when a load is placed at the apex of the truss.

Fig. 10.1 shows a cam and follower mechanism (spring, nylon bearing, cam follower, cam position). Draw a cam on the position shown in Fig. 10.1 to operate the cam follower 4 times…

Fig. 11.1 shows an incomplete circuit for a transistor amplifier (+9 V, 0 V, 1 kohm, lamp L1). Add the missing connection to Fig. 11.1.