关于tap卡的使用

As a traveller,  Can I purchase the day pass tap card on the bus ?


 


As a traveller, the first day, if  I purhase the tap card and load $1.5  to ride 1 way. The second day, can I hold the tap card to get on the metro bus to load with $5 as the day pass?


 


Another question, if I get on the bus and pay cash $1.5 for 1 way, on the same time, can I purchase  the  day pass tap card from the bus driver and use another day?