This set of Building Materials Interview Questions and Answers for freshers focuses on “Components of a Door”.
1. A ______ may be defined as an openable barrier secured in an opening left in a wall for the purpose of providing access to the user of the structure.
Explanation: Door basically consists of two parts, namely, frame and shutter. The door shutter is held in a position by the door frame which in turn is fixed in the opening of the wall by some suitable means.
2. A ____________ may be defined as an opening made in a wall for the purpose of providing daylight, vision and ventilation.
Explanation: Window is also like door consists of two parts i.e. Frame and shutter. The window frame is suitably fixed in the opening of the wall and the window shutter is held in position by the window frame.
3. The main function of ______ in a building is to serve as a connecting link between the various internal parts.
Explanation: The number of rows in a room should be kept minimum due to the fact that more number of doors will cause of obstruction and reduce the effective usable carpet area of the room.
4. The ___________ are generally provided to give light and ventilation both to the interior part of a building.
Explanation: When Windows are provided for a purpose of light only, as in case of storage room, showrooms, etc., they may be fixed so that they cannot be open. But when Windows are provided for light and ventilation, some or all the portions of Windows must open.
5. The minimum width for __________ doors, ____________ doors and doors in public building such as hospitals, library, etc., are 800 mm, 1 m and 1.2 meters respectively.
a) Internal, External
b) External, Internal
c) Internal, Main
d) External, Main
Explanation: Regarding height and width of a door, the general rule followed in India is as follows – Height = width + 1 m to 1.2 m approx. & WidthWidth = 0.4 to 0.6 of height.
6. The size of ________ depends on the dimension of the room, use of the room, location of the room, direction and speed of the wind, obstruction to light by neighbouring buildings, etc.
Explanation: For 30 M3 inside content of the room, there should be at least 1 m square of Window opening. The total area of the window opening should be at least 15% of the floor area of the room.
7. The BIS recommends that the size of a door frame and window frame should be derived after allowing a margin of ______ mm alround an opening for convenience of fixing.
a) 2 mm
b) 6 mm
c) 5 mm
d) 10 mm
Explanation: The width and height of an opening is indicated by number of modules where each module is of 100 mm. The height of opening for door is considered from below the floor finish to the bottom of lintel.
8. For instance, the designation 6 WS 13 denotes a window opening with single shutter having width equal to 6 modulus i.e. _____ and height equal to 13 modulus i.e. _____
a) 600 mm, 13 mm
b) 6 mm, 13000 mm
c) 600 mm, 1300 mm
d) 6 mm, 13 mm
Explanation: In a similar way, the designation 12 WT 12 denotes a Window opening with two Shutters having width and height is equal to 12 models i.e. 1200 mm.
9. The _______ is the most common material for door and windows as it can be moulded in variety of shapes and can thus present a decent appearance.
Explanation: The usual materials for doors and windows are wood, glass, plywood and metals. The glass is used for panels to admit more light. The plywood can be used as a covering material. The metals, such as aluminium and steel, now commonly used, especially for the windows.
10. The traditional _______ door shutters have inevitable problems of wrapping, rotting, painting and maintenance.
Explanation: The traditional wooden door shutters cannot therefore be considered suitable for bathrooms, toilets and kitchens where the water contact is continuous.
Sanfoundry Global Education & Learning Series – Construction and Building Materials.
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