NOCTI Tools, Materials, and Equipment 2 — Questions and Answers
Question 1: What is the primary purpose of a torque wrench?
- To remove rusted bolts
- To apply a specific, measured amount of rotational force to a fastener (Correct answer)
- To cut through metal bolts
- To hold bolts in place during assembly
Correct answer: To apply a specific, measured amount of rotational force to a fastener
A torque wrench is a precision tool designed to apply a specific, calibrated amount of rotational force to a fastener.
Types include click-type, beam-type, digital/electronic, and dial-type. Measured in foot-pounds or Newton-meters. Common applications include automotive lug nuts, engine head bolts, and structural steel connections. Under-torquing causes loosening; over-torquing can strip threads or cause fatigue. Torque wrenches require periodic calibration.
Question 2: What personal protective equipment (PPE) is required when operating a grinding wheel?
- Only gloves
- Safety glasses or face shield, hearing protection, and gloves at minimum (Correct answer)
- Just a hard hat
- No PPE is required for grinding
Correct answer: Safety glasses or face shield, hearing protection, and gloves at minimum
Grinding operations require multiple PPE items including eye/face protection, hearing protection, and gloves.
Required PPE: ANSI Z87.1-rated safety glasses and/or face shield, hearing protection (grinders produce 90-110 dB), leather or cut-resistant gloves, and respiratory protection when grinding hazardous materials. Additional safety: inspect wheels for cracks, never exceed maximum RPM, use wheel guards, and allow the wheel to reach full speed before engaging.
Question 3: What is the difference between a Phillips head and a flat head (slotted) screwdriver?
- They are different names for the same tool
- A Phillips has a cross-shaped tip; a flat head has a single straight blade (Correct answer)
- Phillips is for metal screws; flat head is for wood screws
- Flat head screwdrivers are larger than Phillips screwdrivers
Correct answer: A Phillips has a cross-shaped tip; a flat head has a single straight blade
A Phillips screwdriver has a cross-shaped (+) tip, while a flat head has a single straight blade tip.
Other common drive types include Pozidriv, Robertson/square drive, Torx/star drive, and hex/Allen. Phillips was designed to cam out intentionally at a certain torque. Using the correct driver type and size prevents cam-out, stripped screw heads, damaged driver tips, and injury from slipping.
Question 4: What is the purpose of a level tool in construction?
- To measure the length of surfaces
- To determine if a surface is perfectly horizontal (level) or vertical (plumb) (Correct answer)
- To cut materials at precise angles
- To detect metal objects behind walls
Correct answer: To determine if a surface is perfectly horizontal (level) or vertical (plumb)
A level determines if a surface is perfectly horizontal, vertical, or at a specific angle, using bubble vials or digital readouts.
Types include spirit/bubble levels, torpedo levels, box beam levels, digital levels, rotary laser levels, and plumb bobs. A quality level has at least three vials: level, plumb, and 45-degree. Check calibration by reversing the level. An out-of-level structure cascades errors through the entire project.
Question 5: Why is it important to inspect tools before each use?
- Only to keep tools looking clean
- To identify damage, wear, or defects that could cause tool failure, injury, or poor work quality (Correct answer)
- It is only required for power tools
- To determine if tools need to be replaced with newer models
Correct answer: To identify damage, wear, or defects that could cause tool failure, injury, or poor work quality
Pre-use tool inspection identifies damage, wear, or defects that could cause the tool to fail during use, potentially causing injury or poor work quality.
Inspection points include handles, cutting edges, electrical cords and plugs, pneumatic connections, measuring tool calibration, and safety devices. Defective tools must be immediately tagged and removed from service. The few seconds spent on inspection prevents injuries, rework, and liability.
Question 6: What type of saw is best suited for making curved cuts in wood?
- Table saw
- Circular saw
- Jigsaw (saber saw) (Correct answer)
- Miter saw
Correct answer: Jigsaw (saber saw)
A jigsaw uses a thin, reciprocating blade that can follow curved patterns, making it ideal for cutting curves and irregular shapes.
Key features include variable speed control, orbital blade action settings, and quick-change blade systems. Blade selection varies: fine-tooth for smooth cuts and metals, coarse-tooth for fast cuts in wood. For tighter curves, a coping saw or scroll saw provides finer control. Circular saws, table saws, and miter saws are designed for straight cuts only.
NOCTI Tools, Materials, and Equipment 2
What is the primary purpose of a torque wrench?