Took the 313d Test

[bigron18]

Hi guys i just took the test Friday the 28th and got my letter on wednesday pass the test is tricky you just have to know your stuff a lot on txv heat pumps static pressure. and a lot more it took me 3.5 hours good luck boys

[walker]

do you remember what type of questions they were asking on the txv valves, heat pumps and static pressure?? or specifically what should I know for sure? im writing the test in a few weeks