ASVAB Shop Information 5 — Questions and Answers
Question 1: What does it mean when a drill bit is described as 'high-speed steel' (HSS)?
- It can only be used at high drill speeds
- It is made from steel alloy that retains hardness at high temperatures (Correct answer)
- It is designed specifically for use on stainless steel
- It cuts faster than standard bits because of its flute design
Correct answer: It is made from steel alloy that retains hardness at high temperatures
High-speed steel (HSS) is an alloy that maintains its hardness and cutting edge even when the bit heats up from friction during drilling.
Question 2: In masonry work, what is the main ingredient that makes Portland cement harden?
- Sand
- Water triggering a chemical reaction with calcium silicates (Correct answer)
- Gravel aggregate
- Lime added during mixing
Correct answer: Water triggering a chemical reaction with calcium silicates
Water triggers hydration of calcium silicate compounds in Portland cement, causing it to crystallize and harden through a chemical process.
Question 3: Which hand saw has fine teeth and a stiffening rib along its back, used for precise joinery cuts?
- Crosscut saw
- Rip saw
- Back saw (Correct answer)
- Hacksaw
Correct answer: Back saw
A back saw has a rigid spine along the top of the blade that prevents bending, allowing accurate fine cuts in wood joinery.
Question 4: What is the function of a snap ring (circlip) in mechanical assemblies?
- To provide a flexible seal against fluid leakage
- To retain components on a shaft or inside a bore without threading (Correct answer)
- To absorb shock between rotating components
- To align shaft components during assembly
Correct answer: To retain components on a shaft or inside a bore without threading
A snap ring fits into a groove on a shaft or in a housing to act as a removable shoulder that prevents axial movement of components.
Question 5: When using a table saw, what device is positioned directly behind the blade to prevent the wood from pinching and kicking back?
- Fence
- Miter gauge
- Splitter/riving knife (Correct answer)
- Push stick
Correct answer: Splitter/riving knife
A splitter or riving knife follows immediately behind the blade, keeping the cut open so the wood cannot close and bind against the blade.
Question 6: What is the correct way to measure the diameter of a round rod using a micrometer?
- Place the rod on the anvil and tighten the thimble until snug, then read the scale (Correct answer)
- Estimate based on the rod fitting into a standard drill bit hole
- Use the micrometer's depth rod attachment for round stock
- Convert the circumference measurement by dividing by pi
Correct answer: Place the rod on the anvil and tighten the thimble until snug, then read the scale
Place the workpiece between the anvil and spindle, turn the thimble until lightly snug, then read the graduated barrel and thimble scales.
Question 7: In electrical systems, what does GFCI stand for and where is it commonly required?
- Ground Fault Circuit Interrupter — required near water sources like kitchens and bathrooms (Correct answer)
- Ground Frequency Current Indicator — required in high-voltage panels
- General Fault Circuit Isolator — required on all outdoor circuits
- Grounded Fuse Circuit Insulator — required in commercial buildings only
Correct answer: Ground Fault Circuit Interrupter — required near water sources like kitchens and bathrooms
A GFCI (Ground Fault Circuit Interrupter) detects current leakage to ground and trips within milliseconds, required by code near sinks, tubs, and outdoor outlets.
ASVAB Shop Information 5
What does it mean when a drill bit is described as 'high-speed steel' (HSS)?