Final answer:
During pulmonary testing, the client should be encouraged and coaxed when maximal effort is required.
Step-by-step explanation:
The statement 'During pulmonary testing, the client should be encouraged and coaxed when maximal effort is required.' is True. During pulmonary testing, it is important for the client to give their maximum effort in order to obtain accurate results. This may require encouragement and coaxing from the healthcare provider to ensure that the client is putting in their best effort.