What is the clearance for a triangular pitch?

• A. <a href="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-effective-diameter-shell-side-q9a.png"><img alt="The clearance for a triangular pitch - option a" class="alignnone size-full wp-image-246994" height="368" sizes="(max-width: 409px) 100vw, 409px" src="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-effective-diameter-shell-side-q9a.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-effective-diameter-shell-side-q9a.png 409w, https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-effective-diameter-shell-side-q9a-300x270.png 300w" width="409"/></a>
• B. <a href="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-effective-diameter-shell-side-q9b.png"><img alt="The clearance for a triangular pitch - option b" class="alignnone size-full wp-image-246995" height="371" sizes="(max-width: 420px) 100vw, 420px" src="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-effective-diameter-shell-side-q9b.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-effective-diameter-shell-side-q9b.png 420w, https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-effective-diameter-shell-side-q9b-300x265.png 300w" width="420"/></a>
• C. <a href="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-effective-diameter-shell-side-q9c.png"><img alt="The clearance for a triangular pitch - option c" class="alignnone size-full wp-image-246996" height="373" sizes="(max-width: 424px) 100vw, 424px" src="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-effective-diameter-shell-side-q9c.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-effective-diameter-shell-side-q9c.png 424w, https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-effective-diameter-shell-side-q9c-300x264.png 300w" width="424"/></a>
• D. <a href="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-effective-diameter-shell-side-q9d.png"><img alt="The clearance for a triangular pitch - option d" class="alignnone size-full wp-image-246997" height="381" sizes="(max-width: 410px) 100vw, 410px" src="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-effective-diameter-shell-side-q9d.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-effective-diameter-shell-side-q9d.png 410w, https://www.sanfoundry.com/wp-content/uploads/2019/09/heat-transfer-operations-questions-answers-effective-diameter-shell-side-q9d-300x279.png 300w" width="410"/></a>