A professional who tends equipment to dissolve crude tetryl in heated benzene for manufacture of explosives. Respnsibilities include:

• Starts pump to transport benzene in weighing tank and turns valve to transfer it to dissolving tank.
• Admits steam to outer jacket of dissolving tank to heat solvent.
• Weighs out raw tetryl on scale and scoops it into tank with heated solvent.
• Starts agitator to mix solution for prescribed time.
• Turns valve to transfer solution to crystallizer for recovery of solvent.