This set of Construction and Building Materials Multiple Choice Questions & Answers (MCQs) focuses on “Parts of Window”.
1. A __________ door is formed from the vertical boards, known as the battens, which are secured by horizontal supports, known as ledges.
b) Ledged and braced
c) Ledged and framed
d) Ledged, framed and braced
Explanation: In Ledged doors, the battens are 100 mm to 150 mm wide and 20 mm to 30 mm thick. The ledges are generally 100 mm to 200 mm wide and 30 mm thick. The three ledges are generally employed to top, middle and bottom. The battens are secured by means of suitable joints and the shutter is hung on T- Hinges which are fixed on the ledges.
2. _________ doors are similar to the ledge doors except that the diagonal members, known as the braces, are provided.
c) Ledged and braced
Explanation: The braces are generally 100 mm to 150 mm wide and 30 mm thick. The braces give rigidity to the door and hence the doors of this types are useful for wide openings. The braces are usually housed in the ledges.
3. In ________ type of doors, a Framework for Shutters is provided to make the doors strong and better in appearance.
b) Ledged and framed
Explanation: In Ledged and framed doors, the styles are generally 100 mm wide and 40 mm thick. The battens and ledges are provided as usual.
4. _________ doors are just similar to the framed type except that the braces are introduced.
a) Ledged, framed and braced
Explanation: Ledged, framed and braced type of door is more durable and stronger and hence it can be adopted for external use. The braces should be inclined upward form the hanging side.
5. _________ is the most usual variety of door and consist of a framework in which panels are fitted.
a) Framed and panelled
Explanation: Framed and panelled types of door reduces the tendency of shrinkage and presents a decent appearance. The styles are continuous from top to bottom and rails are joined to the styles.
6. In order to admit more light, in addition to that coming from the windows, _________ doors are used.
Explanation: Usually the ratio of glazed or sash portion to panelled portion is 2:1. The glass is received into the rebates provided in the wooden Sash bar and secured by nails and putty or by wooden beads fix to the frame.
7. A _________ door consists of a framework of rails and styles and it is covered with plywood or hardboard.
Explanation: There are two varieties of flush doors i.e. frame flush door and a laminated flush door. A framed flush door consist of styles, rails, horizontal ribs, vertical ribs and Plywood. A laminated flush door consist of styles, rails, laminated Core and Plywood.
8. In _________ types of doors, the shutters are provided with louvers, either fully or partly.
Explanation: The louvers are arranged at such a inclination that the horizontal vision is obstructed. Thus the upper back is of any louver will be higher than the lower front edge of the louver just above it.
9. A _________ door consists of a mild steel frame.
Explanation: In Collapsible steel door, the two vertical pieces of mild steel channels, about 15 mm to 20 mm wide, are joined together with the hollow portion of the channel inside. A vertical gap of about 12 mm to 15 mm is thus created.
10. A ___________ door essentially consist of a centrally placed mullion or pivot in a circular opening.
Explanation: The revolving shutters or leaves which are 4 in numbers are radially attached to the pivot. The shutters may be fully glazed, fully panelled or partially panelled and partially glazed. The central pivot is provided with the ball bearing at the bottom and Bush bearing at the top so that its rotation is smooth and without any jerks, friction and noise.
11. A __________ steel door consists of a frame, a drum and a shutter of thin Steel plates or Iron sheets of thickness about 1 mm.
Explanation: The rolling Steel doors are sufficiently strong and as they can be easily rolled up at the top, they cause no obstruction to the floor as well as the opening. The Rolling doors are usually provided for the garage, showrooms, shops, factory buildings, etc.
12. A _________ door is provided with special Hinges known as the double action spring Hinges and thus the shutters of the door are held in closed position, when the door is not in use.
Explanation: In case of Swing doors, when the door is to be used a slight push is made and then the action of spring brings the shutter in open position. This type of door is widely used in a passages of public building such as government offices, banks, etc.
Sanfoundry Global Education & Learning Series – Construction and Building Materials.
To practice all areas of Construction and Building Materials, here is complete set of 1000+ Multiple Choice Questions and Answers.