The main use of metallic arsenic is for strengthening alloys of copper and especially lead (for example, in car batteries). Arsenic is a common n-type dopant in semiconductor electronic devices, and the optoelectronic compound gallium arsenide is the most common semiconductor in use after doped silicon.rsenic and its compounds, especially the trioxide, are used in the production of pesticides, treated wood products, herbicides, and insecticides. These applications are declining, however. A few species of bacteria are able to use arsenic compounds as respiratory metabolites.
Massachusetts CDL Fees. The fee for the Massachusetts CDL general knowledge written test is $30.00. The fee for each Massachusetts CDL endorsement test you take at the same time as the general knowledge test is $10.00.If you take a Massachusetts CDL endorsement test after the Massachusetts CDL permit or license has been issued, the fee will be $30.00.Each additional endorsement test you take during this same transaction will be an additional $10.00. The fee for a road test is $35.00.assachusetts CDL Fees. The fee for the Massachusetts CDL general knowledge written test is $30.00. The fee for each Massachusetts CDL endorsement test you take at the same time as the general knowledge test is $10.00.
1 There is a fee of $40.00 to take the CDL road test (skills test). You can pay the road test fee when the DMV office issues your commercial learner permit, or you can pay the fee online. You must pay the fee before you can schedule your road test.  Prepare for your road test and practice with a supervising driver.