Here is an example questionnaire on internal customer satisfaction using "Internal Customer Satisfaction" as the dependent variable:

• On a scale of 1 to 5, how satisfied are you with the communication you receive from other departments or colleagues within your organization?

1 - Not Satisfied 2 - Slightly Satisfied 3 - Neutral 4 - Satisfied 5 - Very Satisfied

• How responsive are other departments or colleagues within your organization to your requests or inquiries?

1 - Not Responsive at All 2 - Somewhat Responsive 3 - Neutral 4 - Responsive 5 - Extremely Responsive

• How would you rate the quality of service provided by other departments or colleagues within your organization?

1 - Poor Quality 2 - Below Average Quality 3 - Average Quality 4 - Above Average Quality 5 - Excellent Quality

• To what extent do other departments or colleagues within your organization exhibit professionalism in their interactions with you?

1 - Very Unprofessional 2 - Somewhat Unprofessional 3 - Neutral 4 - Somewhat Professional 5 - Very Professional

• How reliable are other departments or colleagues within your organization in delivering on their commitments to you?

1 - Not Reliable at All 2 - Somewhat Reliable 3 - Neutral 4 - Reliable 5 - Extremely Reliable

• On a scale of 1 to 5, how satisfied are you with the overall service provided to you by other departments or colleagues within your organization?

1 - Not Satisfied 2 - Slightly Satisfied 3 - Neutral 4 - Satisfied 5 - Very Satisfied

• How likely are you to recommend your organization to others as a good place to work?

1 - Not Likely at All 2 - Somewhat Unlikely 3 - Neutral 4 - Somewhat Likely 5 - Very Likely

• What improvements would you suggest improving internal customer satisfaction within your organization?

Thank you for participating in this survey! Your feedback is important to us.

This is just an example of kind of questions you can create in your questionnaire you can easily do it using Google Forms most easy way

Hope this helps