Detonation is when an air-fuel mixture explodes, rather than burns. It can often take place when an engine’s air-fuel mixture is lean.
The current that flows through the ignition primary winding builds a strong magnetic field that surrounds both it and the secondary coil winding. This is the device that creates high voltage for the spark plugs.
Engine coolant is normally made up of a 50/50 mix of antifreeze and water.
The most common drive tool for sockets is the ratchet, which turns the fastener in only one direction as the handle is moved back and forth through a narrow arc. Ratchets are reversible, so they can be set to tighten or loosen a fastener. Sockets can also be used with pneumatic (compressed air) power tools, such as an air impact wrench. The air impact wrench can remove fasteners quickly by applying tremendous amounts of torque (twisting force) using a “hammering” action that vibrates fasteners loose.
Automotive technicians will sometimes use a steel rule or tape measure to determine distances or the width of objects. When accuracy down to one-thousandths of an inch is required, an outside micrometer is used. The outside micrometer is made to measure the outside diameter of cylindrically shaped objects, as well as the thickness of flat objects. While a Crescent wrench can be adjusted to accommodate different widths, it is not used for measurement.
The diagram indicates that the intake and exhaust valves are closed, and the piston is headed for BDC. That means that the engine is in the power stroke phase of its cycle.
A fuel injector sprays fuel into the intake stream as it receives electrical signals from the powertrain control module (or PCM).
Carpenters often will use a claw hammer, which serves a dual purpose. The hammer head has two ends: one to drive nails and the other to remove nails. Claw hammers come in a variety of sizes, and these are determined by the weight of the hammer head. A general purpose claw hammer would have a 13 oz head.
This is a center punch. Center punches are used to make small indentations that serve as starting marks for drilling operations. Making a small indentation with a center punch can help the drill bit stay on target long enough to get a hole started.
Spark plugs are threaded into the cylinder head where the spark plug protrudes into the combustion chamber and generates the spark to initiate combustion.
Automatic transmissions do all of the gear selection for the driver. This is done in the transmission using hydraulics and planetary gear sets. The newest automatic transmissions are controlled electronically by the vehicle’s powertrain control module.
Brake systems are hydraulically operated. A pumping piston, located in the master cylinder, is operated by the brake pedal and puts pressure on the system’s brake fluid.
A hacksaw is used for cutting metals such as steel, aluminium, or copper. The blades in a hacksaw are replaceable, and it is important to choose the right blade for the material that is going to be cut.
MIG welding is also known as wire-feed welding because the electrode used for the weld process is a wire that is automatically fed from a spool.
The carpenter’s level has three level vials, which are mounted horizontally, vertically, and at a 45-degree angle. It is used in construction for checking for true vertical, true horizontal, and 45-degree angles.
None of the ignition systems listed would utilize contact points. Only older cars with breaker points would have contact points.
When working with wood, there are many occasions when it is necessary to remove a small amount of material to make a piece fit properly or to make a surface smooth. One tool that can be used for this purpose is a plane.
The pitman arm is a short lever arm connected to the steering gear that transmits the steering force from the cross shaft to the steering linkage system. Long-short arm suspensions most commonly use linkage steering to connect the steering column to the pitman arm, center link, and idler arm.
The catalytic converter is responsible for converting the toxic components of engine exhaust into relatively harmless compounds such as carbon dioxide and water and is, thus, part of the emission control system.
The most common type of pliers is the combination slip-joint. These are adjustable at the joint of the two handles of the pliers. With two different positions to choose from, these pliers can grip objects in a wide range of sizes. Sometimes, this design also incorporates a wire cutter for increased versatility.
For higher engine speeds, the flame must be started earlier in order to generate the most effective downward push on the piston. This is known as advancing the timing.
A ball-peen hammer is used for forming soft metal, peening rivet heads, and striking metal in out-of-the-way places.
A common type of suspension system, long-short arm suspension systems include (A), ball joints, (B), upper control arms, and (C), lower control arms, among other components. A (D) torque converter is part of an automatic steering system, not a suspension system.
The most common chisel is the cold chisel, which has a straight, sharp edge for cutting off bolt heads or separating two pieces of an assembly.
Of the given choices, only worn engine bearings would not be the cause of a loss of compression, as the engine bearings do not weigh in on compression issues.