Which of the following conditions does NOT exert dynamic loading on a crane?

Dynamic loading refers to the loads that cause fluctuations in the crane's lifting capacity, often due to movement or external factors that change while the crane is in operation. The selected answer highlights a scenario where such fluctuations do not occur.

When a crane operates with a static boom angle, the boom remains fixed in place. This means that there are no additional forces applied due to movement; the load is simply supported by the crane in a steady state. Therefore, under these conditions, the crane experiences a static load rather than a dynamic load, leading to stability.

In contrast, the other conditions mentioned — swinging, adverse operating conditions, and traveling — all introduce some level of movement or irregularities that can create dynamic loads. Swinging occurs when the load moves or sways, which generates forces that can change as the load shifts. Adverse operating conditions, such as wind or uneven ground, can cause unpredictable stresses on the crane and its load. Traveling involves moving the crane or its load, introducing additional forces as acceleration and deceleration occur.

Thus, the static boom angle represents a condition where dynamic loading is not present, making it the correct choice.