Fully prestressed concrete beam means:

Answer is option"3" Working loads are completely resisted by prestressing force.

Thank you for invitation

Agree with your answer 

3: >>>>>>>>>>>>>>working loads are completely resisted by prestressing force

none of these, only the static loads are resisted by the prestressing

answer number3 is the pest answer

May be working loads are completely resisted by prestressing force

3) may be this answer is the most available one but i have to give an additional information about prestressed concrete design Sometimes we need to use traditional S420 steel or equivalent quality structural steel for resisting flexural stress especially in restrain area and it depends on bonding quantity of strands.

Prestressed concreteis a form ofconcreteused in construction which is "pre-stressed" by being placed undercompressionprior to supporting any loads beyond its own dead weight.This compression is produced by thetensioningof high-strength "tendons" located within or adjacent to the concrete volume, and is done to improve the performance of the concrete in service.

my answer is Option3- referring to the working loads

         Working  loads are resisted by pre stressing force                                             .

3 and3  and  3

 

only3

 

3

 

3