Why is the Dwell meter used? Explanation: The dwell meter used for setting the contact breaker gap. It uses the dwell angle as the parameter to set the contact breaker gap.
What is dwell time in automobile?
In transportation, dwell time is the time a vehicle such as a public transit bus, train or car spends at a scheduled stop without moving.
How many times the contact breaker must make and break the circuit for a four cylinder engine operating at n RPM?
| Q. | For a four cylinder engine operating at N rpm, the contact breaker must make and break thecircuit |
|---|---|
| B. | 2N times |
| C. | N/2 times |
| D. | none of the above |
| Answer» b. 2N times |
Which of the following terms is used to express ignition advance?
12. Which of the following is used to define ignition advance? Clarification: The difference between ignition delay and the occurrence of spark in terms of degree of crankshaft rotation, is termed as ignition advance.
What is the function of the ignition coil which is simply a transformer Mcq?
What is the function of the ignition coil which is simply a transformer? Explanation: The ignition coil is simply a transformer with certain characteristics making it suitable for its special use but impairing to some extent its efficiency as a transformer. It serves to set up the low battery voltage to high voltage.
Why is dwell meter used?
Why is the Dwell meter used? Explanation: The dwell meter used for setting the contact breaker gap. It uses the dwell angle as the parameter to set the contact breaker gap. To set the ignition timing stroboscope is used.
What is a dwell meter?
A dwell meter measures the angle of rotation of the cam through which the points are opened and closed, and registers the dwell angle – the period when they are closed.
On what principle does the braking system in the car work Mcq?
On what principle does the braking system in the car work? Explanation: Frictional force is the main force which acts and plays an important role in the braking system. The disc pads get to rub against the drum and which creates the friction and opposes the motion of the rotational motion of the drum.
What is the angle between the steering axis and the vertical in the plane of the wheel?
Explanation: Castor is the angle between the steering axis and the vertical in the plane of the wheel. Positive castor improves the straight-line stability of the car.
Why a small amount of gasoline is added to alcohol?
Why a small amount of gasoline is added to alcohol? Explanation: When a small amount of gasoline is added to alcohol, it improves cold-weather starting. Alcohols have low energy content. This means that almost twice as much alcohol as gasoline must be burned to give the same energy input.
Why is ignition advance required?
Timing advance is required because it takes time to burn the air-fuel mixture. Igniting the mixture before the piston reaches TDC will allow the mixture to fully burn soon after the piston reaches TDC.
What is the purpose of vacuum advance?
The added ignition timing from the vacuum advance allows the lean cruise mixture to achieve as complete a burn as possible during the power stroke and maximize engine efficiency.
Why is ignition timing important?
The major benefit to advancing the timing of a vehicle’s ignition is increasing the horsepower of an engine. Advancing the ignition timing helps raise the high-end power while reducing the low end. It also helps get the spark past the ignition delay and run at peak power.
What is the function of ignition coil simply as a transformer?
The ignition coil is a high voltage (low current) transformer that converts the vehicle’s 12 volt power supply to the 25-30,000 volts required to jump the gap of the spark plug, thus instigating combustion.
Which one of the following is mounted between the engine and gearbox Mcq?
| Q. | Which one of the following is mounted between the engine and gear box? |
|---|---|
| A. | Propellor shaft |
| B. | Differential gear |
| C. | Reduction gear |
| D. | Clutch |
What is the function of capacitor in battery ignition system?
Capacitor: A capacitor is made up of two metal plates separated by air. It is connected in parallel to the contact breaker to prevent damage to it caused by the rapid drop in current and magnetic field. In this way, it facilitates the generation of high voltage through ignition coil required for the spark.
How do you use a dwell meter?
Connecting the Tach Dwell Meter
- Run the engine long enough to bring it up to normal operating temperature and then shut it off.
- Connect the positive lead on the tach dwell meter to the positive terminal on the ignition coil.
- Connect the negative lead on the tach dwell meter to the negative terminal on the ignition coil.
What is dwell in an ignition system?
Dwell, or ‘dwell time’ in ignition systems refers to the period of time that the coil is turned on, ie that current is flowing through the primary winding and the magnetic field is building up in the coil.
How important is dwell angle?
The DWELL ANGLE is the number of degrees of engine rotation corresponding to the dwell time. It is important as the dwell must be sufficiently long to ensure a good spark and it must be timed correctly to correspond to when the particular cylinder/spark plug needs a spark to make the engine run as designed.
Do I need a dwell meter?
The dwell meter is a necessary piece of equipment for tuning early-model vehicles that use a conventional points type distributor. The coil, which is similar to a capacitor, is charged for the length of time the points are closed.
What is dwell time?
Simply put, dwell time is the amount of time a user takes analyzing a web page before clicking back to search results. If a web page has a low dwell time, it likely means the page didn’t match the user’s search intent. It’s important to note, dwell time and bounce rate are two different things.
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