3) Which one of the following types of tapers is used for drills and reamers ?

4) Which one of the following tapers has been adopted by International Organization of Standardization as ISO 296 ?

5) Morse tapers are of self-holding variety, and can have three types of ends. Which one of the following is not among those three ?

6) Which Morse taper is found in drill presses up to 1/2'' capacity ?

7) Brown and Sharpe taper is available in a series of sizes. The series is :