The expected efficiency of a single riveted lap joint is of the order of 50%. If the thickness of the plate is increased four times, then the rivet diameter will have to be increased ___________________ times ?

(A) Two ()
(B) Four (X)
(C) Six (X)
(D) Eight (X)

Answers: The expected efficiency of a single riveted lap  joint is of the order of 50%. If the thickness of the plated is increased four times, then the rivet diameter will have to be increased Two times.