Chapter 2 Summary Flashcards
Common Wrenches include box-end, open end,, combination, tubing, adjustable, Allen, socket and torque wrenches
Pliers are used for gripping, bending, pulling, or cutting. They should never be used for tightening purposes.
Several types of screwdrivers are also required for small engine work, including the straight blade screwdriver, and the offset screwdriver
Hammers are used for tapping things into place. Hard faced hammers have a head that is made of steel. The head on soft- faced hammers is made of lead., copper, brass, leather, wood, or plastic. Soft- faced hammers are used o parts that would be easily damaged by a hard-faced hammer.
Punches are used to make depressions in metal surfaces before drilling, to drive pins from holes, and to align holes in mating parts.
Seal drivers are used to drive seals squarely into their bores without damaging them.
Hacksaws are used to cut through metal.
Reamers are used to enlarge and smooth bores.
Files are used to shave small amounts of metal from a surface.
Cold chisels are used to shear bolts, pins, rivets, sheet metal, and other materials.
Probe and pickup tools assist when small items are dropped into areas that cannot be reached with hands and fingers.
A machinist’s vise is useful for holding parts while they are being worked on. Sheet copper aluminum, or wood can be used to pad the vise jaws when working on parts that must not be scratched.
Technicians must also use many specialized engibe tools when rebuilding and servicing engines. Common engine tools include gear pullers, flywheel holders, ridge reamers, ring spreaders, ring compressors, glaze breakers, cylinder hones, valve spring compressors, lapping sticks, tachometers, spark testers, and compression testers.
Electric drills are handheld tools used to bore holes in materials. Specialized bits and accessories can be installed in electric drills, so they can be used to perform cleaning, sanding, or grinding functions.
Drill presses are stationary machines used to bore holes. They are larger and more powerful than handheld drills
Bench grinders are stationary machines that can be equipped with abrasive wheels for grinding operations. wire brushes for cleaning operations, or buffing wheels for polishing.
Scrapers are thin blades used to remove old gasket material, carbon buildup, or grime. Plastic or brass scraper blades should be used to clean critical or soft metal parts.
Wire brushes are used to remove oxidation or carbon buildup from metal parts.
Wooden or plastic toothpicks can be used to clean small passages, like those in carburetors.
A Cleaning tank is often used to clean small engine parts.
A micrometer is a precision instrument used to measure crankshafts, pistons, and other components. A standard micrometer measures to three decimal places. A metric micrometer measures to the hundredths of a millimeter. Vernier micrometers can be used to obtain readings to four decimal places.
A vernier caliper is another precision measuring instrument. Vernier calipers are available to measure in either standard or metric units. A vernier caliper can be used to take both internal and external measurements.
Telescoping gauges are used to transfer dimensions to an outside micrometer. A small hole gauge is used to measure holes that are too small for the telescoping gauge.
Thickness guages, often called feeler gauges, can be leaf-type or wire-type. They are used to measure small spaces and gaps between surfaces.
A dial indicator is used to measure the movement of various parts. Many holding devices are available to hold the indicator in the desired location.
A screw pitch gauge is used to determine the number of threads on a screw, bolt, or nut. Screw pitch gauges are available for both standard and metric threads.
What type of wrench is open on one end and boxed on the other?
D) Combination wrench.
Which type of wrench should be used only as a last resort if others are not available?
C.) Adjustable
Which wrench would be the best choice for loosening a hex- head bolt in a counterbore?
D.) Socket wrench
A torque wrench is used to measure the turning force applied to a threaded fastener.
True
Which of the following is a true statement regarding retaining ring pliers?
D.) Retaining ring pliers are commonly used to remove piston rings.
To locate a position to be drilled, a hammer and a _____________ should be used.
A.) Center punch
When using punches and cold chisels, it is very important to make sure the hammered end is not:
C.) Flared
What is the purpose purpose of a ring compressor?
C.) It compresses piston rings so the piston can be installed in the cylinder.
A[ ] usually consists of a rigid shaft, to which two or three replaceable flat cutting stones are attached
D: Cylinder hone
Should Small drill bits or pieces of wire be used to clean small passages in carburetors?
False
Each space on the thimble of a standard micrometer represents
.001”
Each space on the sleeve of a standard micrometer represents what part of an inch?
D: .025”
The discrimination of a Vernier micrometer is:
A: .01”
A telescoping gauge is used for measuring
A: Inside diameters
A telescoping gauge is used to:
B: Transfer inside dimension to an outside micrometer
An instrument called a [ ] is used to determine the number of threads per inch on bolts or nuts
C: A screw pitch gauge
Which measuring instrument is similar to a telescoping gauge?
B: Small hole gauge
Dial indicators measure:
D: All of the above
(A:Surface irregularities, B:Linear movement, C: Runout)
Which of the following statements regarding micrometers is not true?
C: Micrometers should be gripped tightly to ensure an accurate reading
Combination squares can be used to check the straightness and length of valve springs?
True
List 2 common types of engine test instruments:
Tachometers
Spark testers
Crompression tester
List five common engine tools
Wrenches, pliers, punches, chisels, and screwdrivers
Name three types of measuring instruments used to determine if engine parts are within manufacturers tolerance.
(?)Micrometers, Callipers and gauges
In your own words Explain the phrase “ Use the right tool for the right job”
Micrometers, calipers, thicness gauges and dial indicators are precision measuring instruments. However, they may not always produce accurate measurements.
Explain the difference between accuracy and precision, and describe ways that you can ensure your measurements are both accurate and precise:
