QUESTION $2$

What is the maximum transmission angle that needs to be avoided so that a linkage system will not bind?

$45$

$90$

$135$

$180$

QUESTION $3$

Which load class best suits the following system: a bicycle frame?

Class $1$

Class $2$

Class $3$

Class $4$

QUESTION $4$

Which load class best suits the following system: the Empire State Building?

Class $1$

Class $2$

Class $3$

Class $4$