There is no reliable publicly available evidence confirming that Dick Van Dyke scored a 150 on any Army test he took.
Dick Van Dyke scored a 150 on an Army test he took.

FactVerify
Source: factverify.com
Key Evidence
Authoritative biographies and military histories confirm Van Dyke's Army service but do not mention any test scores; no credible source provides evidence for the specific score of 150 on an Army test.
en.wikipedia.orgen.wikipedia.orgDick Van Dyke
What the Evidence Shows
The claim that Dick Van Dyke scored a 150 on an Army test is specific and testable but lacks direct corroboration in authoritative sources. The search results and biographical information from reputable sources such as Wikipedia, Britannica, Military. Com, and official biographies confirm that Dick Van Dyke served in the United States Army Air Forces during World War II and held the rank of Staff Sergeant.
However, none of these sources mention any specific test scores or assessments, including a score of 150 on an Army test. Without primary documentation or credible secondary sources citing such a score, this claim remains unsupported. It is possible that the number '150' could refer to a particular type of test or score, but no context or explanation is provided in the available sources.
Given the absence of evidence, the claim cannot be verified as true or false but must be considered unverifiable based on current information.