🔍 Key Concepts

• How two connecting rods share one crankpin in different designs • Difference between articulated (master-and-articulated) rods and fork-and-blade rods • Noting the shape of the big-end bearing and whether one rod fits inside or onto the other

💭 Think About

• Look closely at the big end in the illustration: does one rod have a split end that forms two ‘prongs’ with a space between them, while the other rod runs between those prongs? • Compare that to an articulated or master-rod system: would you expect to see small pins around the main big end, or just a single shared crankpin? • Ask yourself which of the answer choices specifically describes two rods operating on the same crankpin in a V‑type arrangement as shown.

✅ Before You Answer

• Identify whether the illustrated big end shows a forked rod with two legs and a second rod that fits between them. • Verify if there are any secondary link pins shown (typical of an articulated/master arrangement) or only a single main crankpin bearing. • Match the observed configuration to the term that describes one forked rod and one straight rod sharing a single crankpin.