List of top Questions asked in CBSE CLASS XII

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 ............... .
Multi Point Fuel Injection uses several injectors, normally respective to number of engine cylinders and placed at the ............... of each cylinder.
In rear axle, the drive from the propeller shaft is transmitted via the crown wheel and pinion, to both rear wheels by means of the ............... .
Three quarter floating type of rear live axle is used in ............... vehicles.
The function of engine speed sensor is to monitor engine speed, which is one of the factors used to calculate ............... .
The propeller shaft is normally made by seamless steel tubing method with ............... welded to both ends of the shaft.
Cross or spider type of variable velocity joints, consist of two Y-shaped yokes, connected at right angles to each other by means of a ............... .
A constant velocity joint, consisting of a housing, a spider and a set of three rollers is called ............... joint.
In case of commercial licence renewal, one of the documents required is ............... from the transport authority.
............... leaf spring refers to a semi-elliptical spring mounted in an inverted manner and has a saddle above, forming a bow and is attached parallel to the wheel axle.
In mechanical shock absorbers, the friction action of metallic discs is utilized to control the spring action whereas in hydraulic shock absorber fluid it is used to ............... .
In MacPherson strut suspension, the upper end of the shock absorber and the top of the coil spring are made to sit on the seat provided on the ............... .
The gear in the steering gear box assembly not only steers the front wheels, but at the same time they can act as reduction gears, reducing steering wheel turning efforts by increasing the ............... .
One of the two advantages of power steering system is that it reduces the number of turns of steering wheel required to move it from ............... .