When the VP is not present, the President Pro Tempore presides over the Senate. By custom, the Senate elects the most senior Senator of the majority party to be the President Pro Temp. What ends up happening though, is that the position it delegated to the majority party's junior Senators so that they can learn about how the Senate floor works.
He/she is called the President Pro-tempore... or for short, President Pro-Temp.
Answer
President pro tempore
When the VP is not there to act as President of the Senate, the senators in the majority party elect one of their members as President pro temporate which means "for a time".
The President Pro Tempore (which refers to a specific Senator from the majority party) presides over the Senate in the absence of the Vice President.
President of the Senate
yes
the President pro tempore
If the Chief Justice is absent, the Associate Justice with the most seniority out of all the other Associate Justices presides.
If the vice-president is absent, some other senator, such are the pro tempore, presides over the Senate.
The president pro tempore of the Senate is elected by the Senate, and by tradition the majority party elects their party member who has the longest seniority in the Senate. He is a voting member of the Senate unlike the VP. Most of the time who presides over the Senate is irrelevant.
The treasurer will up hold the position
The President pro tempore is the second highest ranking official of the United States Senate . He is a senator who is elected to his position by the Senate.In actual practice it is not unusual for the vice-president and pro temp to both be absent. In that case another senator or, I think, one of the staff serves as time-keeper and keeps track of who has the floor.
The president pro tempore presides over the Senate when the Vice President is absent. The current president pro tempore (as of 5/17) is Senator Orrin Hatch of Utah.
senete
The 'President Pro Tempore' is the President of the Senate, when the Vice President of the United States is absent.
When did he become prsident?
The first is the Vice President who is in charge of the Senate meetings and can only vote in a tie between the Senators. If the President is absent they choose an alternate known as the President Pro Tempore (Temporary President) who is third in line of the Presidency after the Speaker of The House who is the presiding officer of the House of Representatives and the Speaker of The House will take over the Presidency should anything happen to the President and the Vice President.