List of top Questions asked in CBSE CLASS XII

Which one among the following is not a control device ?
Heat is transfered in a metal rod heated at one end
Which one among the following is not a psychrometric process ?
Which one among the following is not present in a household refrigerator ?
The insulating material is best for domestic refrigerators is
H.P. cutout is essential in the refrigeration systems using ________.
The refrigerant R-11 is
In ice making, thawing of ice means
A grill provided with a damper or control valve is known as
The overload protector provides protection against the _________.
Addition of moisture to the air, without any change in its dry bulb temperature is known as
The psychrometric process generally used in heat pump :
Which one of the following is not a property of a thermal insulating material ?
The evaporator which is commonly used in packaged air conditioner is
Capillary tube is a type of _________.
This type of filter is not used in an air conditioning system :
For small cold storage, the rooms are cooled _________.
In a window air conditioner which one among the following types of condensers is used ?
Which is not the core component of central A.C. ?
Which one among the following is not an equipment of cold storage plant ?
How does the L.P. cutout protect the compressor ?
This component is used to remove the latent heat of refrigerant :
The psychrometric process in which air is cooled and humidified but no heat is supplied or rejected is called ________.
Which of the following encourage people to recycle household waste ?
The mode of heat transfer by the actual movement of particles of the medium from one place to other is called ________.