15 2-29.     A 2M technician is repairing a board that is manufactured with semiclinched leads.    What type of termination should the technician use in replacing components?   1.    Lap flow   2.    Clinched lead   3.    Semiclinched lead   4.    Straight-through-lead Figure 2A. Component mounting. IN ANSWERING QUESTION 2-30, REFER TO FIGURE 2A.    2-30.     What component on the board is NOT properly mounted?   1.    A   2.    B   3.    C   4.    D 2-31.     What type of heat source is a soldering iron?   1.    Radiant   2.    Resistive   3.    Conductive   4.    Convective 2-32.     The shape and size of the soldering iron tip to be used is determined by which of the following factors?   1.    The type of flux to be used   2.    The type of work to be done   3.    The type of solder to be used   4.    The voltage source for the iron 2-33.     A thermal shunt is attached to the leads of a transistor prior to applying solder to the joint.   This shunt serves what purpose?   1.    Prevents short circuits   2.    Retains heat at the joint   3.    Conducts heat away from the component   4.    Physically supports the lead during soldering 2-34.     What is the appearance of a good solder joint?   1.    Dull gray   2.    Crystalline   3.    Bright and shiny   4.    Shiny with small pits 2-35.     What is the most efficient soldering temperature?   1. 360 F   2. 440 F   3. 550 F   4. 800 F