Yes, there are several mock tests and sample papers available for GATE CE preparation. These resources are designed to help candidates assess their level of preparedness, identify their strengths and weaknesses, and get familiar with the exam pattern and question types. Here are some options for accessing these mock tests and sample papers:

1. Official GATE Website:
The official GATE website (https://gate.iitb.ac.in) provides previous years' question papers and mock tests for all disciplines, including Civil Engineering. These papers are a valuable resource for understanding the exam pattern and the level of difficulty.

2. EduRev:
EduRev (http://www.edurev.in) is a popular online learning platform that offers a wide range of study materials, including mock tests and sample papers for GATE CE preparation. They provide free access to a large collection of previous years' question papers, as well as mock tests designed by subject matter experts.

3. Coaching Institutes:
Several coaching institutes that specialize in GATE preparation also offer mock tests and sample papers. These institutes have experienced faculty who design the tests to closely resemble the actual GATE exam. Some well-known coaching institutes include Made Easy, Ace Academy, and The Gate Academy.

4. Online Forums and Communities:
Online forums and communities, such as Quora and Reddit, are great platforms for finding and sharing GATE preparation resources. Many users on these platforms have shared their own mock tests and sample papers, which can be accessed for free.

5. Mobile Apps:
There are various mobile apps available on both Android and iOS platforms that provide mock tests and sample papers for GATE CE preparation. These apps offer a convenient way to practice and revise while on the go.

6. YouTube:
YouTube is a treasure trove of educational content, including mock tests and sample papers for GATE CE preparation. Many channels dedicated to GATE preparation upload videos that simulate the exam environment and provide detailed solutions to the questions.

Overall, there are plenty of resources available for GATE CE mock tests and sample papers. It is recommended to practice a diverse range of questions and solve multiple mock tests to improve time management and enhance problem-solving skills.