CSLB General Building (B) — All Questions

An outside micrometer is used to measure:

• a.Torque on a fastener
• b.Electrical resistance
• c.Precise outside dimensions such as shaft or rotor thickness✓
• d.Coolant temperature

An outside micrometer measures external dimensions to a thousandth of an inch or finer, such as a rotor or crankshaft journal. The reading combines the sleeve and thimble scales. Proper technique and calibration are essential for accuracy.

A torque wrench is used to:

• a.Tighten fasteners to a specified value✓
• b.Measure bore diameter
• c.Test battery voltage
• d.Check tire tread depth

A torque wrench applies a controlled, specified amount of tightening force so fasteners are neither loose nor overtightened. Proper torque is critical for head bolts, wheels, and many other parts. The wrench should be set back to its lowest setting when stored to preserve calibration.

Technician A says wheel lug nuts can be tightened in any order. Technician B says they should be tightened in a crisscross (star) pattern to the specified torque. Who is correct?

• a.Technician A only
• b.Technician B only✓
• c.Both A and B
• d.Neither A nor B

Lug nuts must be tightened gradually in a crisscross pattern to seat the wheel evenly and prevent rotor distortion. Uneven or over-tightening can warp rotors and damage studs. Technician A is incorrect.

Technician A says a vehicle should be supported at the manufacturer's designated lift points. Technician B says rated jack stands should support a vehicle before working underneath it. Who is correct?

• a.Technician A only
• b.Technician B only
• c.Both A and B✓
• d.Neither A nor B

Vehicles must be supported at designated lift points and secured on rated jack stands, never held only by a hydraulic jack. Both technicians are correct. Following these practices prevents damage and serious injury.

Technician A says a dial indicator measures runout, endplay, and gear backlash. Technician B says it must be set up perpendicular to the surface for an accurate reading. Who is correct?

• a.Technician A only
• b.Both A and B✓
• c.Technician B only
• d.Neither A nor B

A dial indicator measures small linear movements such as rotor runout, crankshaft endplay, and backlash, and the plunger must contact the surface perpendicularly for accuracy. Both technicians are correct. It reads deflection in thousandths of an inch.

A vehicle's service information (repair manual) is the best source for:

• a.The owner's phone number
• b.Weather forecasts
• c.Torque specifications, procedures, and wiring diagrams✓
• d.Fuel prices

Service information provides the manufacturer's specifications, step-by-step procedures, wiring diagrams, and fluid capacities needed for correct repairs. Using accurate data prevents mistakes and comebacks. Technicians should verify specs rather than rely on memory.

If a bolt must be torqued to 90 foot-pounds and the specification then calls for an additional 90-degree turn, this method is known as:

• a.Cross-torquing
• b.Torque-to-yield (torque-plus-angle)✓
• c.Preloading only
• d.Static balancing

Torque-plus-angle (torque-to-yield) tightens the fastener to a base torque and then a specified angle, stretching it for consistent clamp load. It is common on head bolts and other critical fasteners. A torque-angle gauge or electronic tool measures the additional rotation.

Proper personal protective equipment when grinding or working with the battery includes:

• a.Only gloves
• b.Only a hat
• c.No protection needed
• d.Eye protection and appropriate gloves✓

Eye protection guards against flying particles and battery acid, and gloves protect the hands from sharp edges and corrosive chemicals. Battery work also warrants care because of explosive hydrogen gas and acid. Safety equipment reduces the risk of injury.

Converting a measurement, a technician knows there are 25.4 millimeters in one inch. A 2-inch dimension equals approximately:

• a.12.7 mm
• b.2.54 mm
• c.50.8 mm✓
• d.254 mm

Multiplying 2 inches by 25.4 mm/inch gives 50.8 millimeters. Being comfortable converting between metric and standard units is important because vehicles use both. Measuring tools and specifications may be given in either system.

A feeler gauge is used to measure:

• a.The gap or clearance between two parts✓
• b.Electrical current
• c.Engine vacuum
• d.Tire pressure

A feeler gauge consists of thin metal blades of known thickness used to measure small gaps, such as valve lash or spark plug gap. The correct blade slides through the gap with a slight drag. It is a simple but precise clearance-measuring tool.