A questionnaire should not be too long, use plain English and the question shouldn't be difficult to answer. Only through careful writing, editing, review, and rewriting can you make a good questionnaire. Many surveys are designed such that the length, content, or wording is not matched to the intended audience. Determine with as much confidence as possible your audience and the purpose of your survey. Your design should follow from aligning the design to meet the audience and purpose.
Respondents prefer shorter surveys to longer ones.
Keep questions clear and concise. Wordy or complex questions can confuse or turn off respondents. If the content is controversial or sensitive, be sure to check your questions and responses to ensure the respondents can answer them as comfortably as possible. Avoid use of technical wording, including jargon and acronyms. Acronyms should be expanded unless they are commonly known by the target audience.