List of top Questions asked in CBSE CLASS XII

Which of the following is not a stage of active listening?
Which of the following is not a greenhouse gas?
Name the various advanced technologies adopted in emission control.
Name the natural sources of emissions occurring in nature.
Write the role of green jobs in limiting greenhouse emissions.
Any kind of substance released into the air from natural or human sources — discharge of gases, liquid droplets or solid particles, is called ............... .
The three way catalytic converter is the most ideal type of catalytic converter since it can convert not only CO and HC, but also ............... into non-polluting substances.
With the help of a proper layout, show the classification of suspension springs. Explain torsion bar spring.
Ankita/Ankit is working as a mechanic in an automobile workshop. She/He receives a car for repair with the defect, transmission is noisy in neutral speed position. Advise her/him to check for various probable causes of defect with their remedies.
Write the various purposes of Automotive Electrical System.
What do you understand by differential?
What do you understand by fuel delivery system/control in electronic fuel injection?
Write the names of the various main parts of a commonly used car washer.
Explain the working principle of hydraulic power steering in neutral (straight-ahead) position and while turning.
Write the working principle of air compressor.
Write any two disadvantages of power steering.
Name the various types of hydraulic shock absorbers.
Write the utility of universal joint in transmission.
What do you understand by exclamatory sentence?
How can ‘living in present’ be a source of motivation and inspiration?
Name any three components of a Calc screen.
What do you understand by “Decisiveness” as an exercise of entrepreneurial attitude?
The DC charging system offers ............... voltage output, particularly at low speeds or idle speeds of engine.
The speed of the generator at which its output voltage just rises above the voltage of the battery being charged is called ............... speed.
In the operation of voltage regulator, as the generator speed rises, the current flowing through the shunt coil of regulator ............... .