Question 10 QMED05 - Machinist-Pump Technician

The Correct Answer is B **Why Option B ("head weight") is correct:** Ball peen hammers, which are primarily used for shaping soft metals, driving chisels and punches, and setting rivets, are universally sized and sold based on the weight of the hammer head. This weight is a critical factor because it determines the force of the strike (the momentum the user can deliver), which is necessary for different metalworking tasks. Standard sizes often range from 2 ounces (for delicate work) up to 48 ounces (for heavy-duty industrial work). **Why the other options are incorrect:** * **A) face diameter:** While the face diameter relates to the striking area, it is a secondary measurement derived from the head design. It is not the standard unit used for cataloging or purchasing the hammer. * **C) peen head size:** The peen (the rounded end) size is proportionate to the head weight, but the overall mass/weight of the entire head, not just the peen's diameter, is the standardized sizing metric. * **D) overall length:** The length of the handle varies to accommodate different head weights (longer handles provide more leverage for heavier heads), but it is a dependent dimension. The size of the hammer is defined by the fixed head weight, not the variable handle length.