What Is Least Likely To Cause An Engine To Hunt And Surge At Top No Load Speeds?

What system utilizes a carbon canister that is connected to both the engine vacuum line and the air space in the fuel tank?

An activated carbon canister is used to capture hydrocarbon vapor emissions from the fuel tank as part of an evaporative emission control system (EVAP) .

Is it true that a passive evaporative vent system is only effective when the engine is running?

A “passive” evaporative vent system is only effective when the engine is running. For proper operation of all active evaporative systems, fuel supply lines must contain liquid fuel, not vapor, and evaporative vapor lines must be open for vapor withdrawal from the tank and not obstructed with liquid.

Is a toxic gas produced by incomplete combustion of gasoline or other hydro carbon fuels?

Carbon monoxide (CO) is a colorless, odorless, and toxic gas, which is predominantly produced by incomplete combustion of carbon-containing materials. Incomplete combustion occurs when insufficient oxygen is used in the fuel (hydrocarbon) burning process.

Which description best defines the term torque within an engine context?

Which description best defines the term “Torque” within an engine context? Rotational force at the crankshaft . During the power stroke, the expanding gases force the top ring on the piston against the cylinder wall.

Which is the least likely cause of an engine to hunt and surge at top no-load speeds a lean air/fuel mixture?

Will mechanical idle stops always be set to a higher speed than the engine idle speed?

Mechanical idle stops will always be set to a higher speed than the engine idle speed . ... No damage can occur from an engine with the incorrect speed setting.

What are the symptoms of a bad charcoal canister?

• High Emissions.
• Fuel Odor.
• Pinging Sounds.
• Weak Performance.
• Check Engine Light.

Which is used to absorb fuel Vapour in the EVAP canister?

The EVAP canister is usually rectangular plastic container mounted somewhere in the vehicle. The canister is filled with activated charcoal , which absorbs and stores gasoline vapors.

Where is connected the EVAP canister outlet?

EVAP Canister:

This canister is connected to the fuel tank by the tank vent line .

What is the least likely cause of an engine to hunt and surge?

Which is the least likely cause of an engine to hunt and surge at top no-load speeds? A completely blocked high-speed air bleed can commonly cause an engine to run very rich under load.

Why is perfect combustion never obtained?

Incomplete combustion occurs when there isn't enough oxygen to allow the fuel to react completely with the oxygen to produce carbon dioxide and water, and also when the combustion is quenched by a heat sink such as a solid surface or flame trap.

What are the symptoms of a shortage of primary air?

Insufficient primary burner air increases CO production . Restricted air inlets often produce a noticeable disruption of the flame and a change from blue to yellow. Another cause of insufficient primary air and incomplete combustion is excess gas flow to the burner.

What is r in torque formula?

The magnitude τ of the torque is given by. where r is the distance from the axis of rotation to the particle , F is the magnitude of the force applied, and θ is the angle between the position and force vectors.

What is more important horsepower or torque?

Torque, simply, is the ability of a vehicle to perform work — specifically, the twisting force applied by the crankshaft. Horsepower is how rapidly the vehicle can perform that work. ... Because there is generally a limit on how fast you can spin an engine, having higher torque allows for greater horsepower at lower rpms.

How do I calculate torque?

A practical way to calculate the magnitude of the torque is to first determine the lever arm and then multiply it times the applied force. The lever arm is the perpendicular distance from the axis of rotation to the line of action of the force. and the magnitude of the torque is τ = N m.