This set of Construction and Building Materials Multiple Choice Questions & Answers (MCQs) focuses on “Fastenings”.
1. ______________ is a form of a solid head where the threads are provided on which a nut moves.
Explanation: The size of bolts should be calculated according to the stresses which they have to resist. The bolts maybe of Steel, wrought iron on bras and they are stronger than Nails or screws. They are used especially for joint subjected to considerable tensile stress and they form the rigid joints.
2. ___________ are the rings of metal which can be used for fasten two members abutting each other.
Explanation: The connectors do not damage the timber and are found to possess sufficient strength. They are usually embedded in the individual members in such a way that the gradual transfer of stress from one member to other is perfectly ensured and there is no danger of sliding of joints.
3. ___________________ are the pieces of wrought iron and are bent at ends to connect other members.
Explanation: Dogs maybe flat or circular. The ends of dogs are appointed so as to facilitate driving into the timber. Dogs can be imagined as a channel section with sharpen ends.
4. ______________ are the pieces of wrought iron or steel and these are driven into the member to be connected using hammer or other means.
Explanation: Nails are used for rough but strong work. The various types of nails are available in market such as Clout nail which are large, flat, circular head. Lath nail which has a square and tapering sank with rough sides and various other nails are with different shapes and sizes.
5. ________________ are the pieces of wrought iron or cast iron and are used to protect the ends of timber.
Explanation: When sockets are placed at the feet of member, they are known as shoe. Whereas, Spikes are large nails of length about 100 mm to 150 mm and they are used for heavy work.
6. _______________ are the bands of steel or wrought iron which can be used to joint two pieces of timber.
Explanation: The breadth of strap is about 40 mm to 50 mm and it’s thickness depend upon the stress coming up on it. The great advantage of using a strap is that the timber is not required to be cut and thus the timber is not weekened.
7. ________________ are used in case of mortise and tenon joint.
Explanation: Wedges are the pieces of wood which are tapered and are used for securing Timber joints as in case of mortise and tenon joint. They are sometimes known as the keys and when used in pairs, they are termed as the folding wedges.
8. _____________ are used when joint is subjected to vibration and the work is to be done in pieces.
Explanation: Screws are used under the following circumstances; the work is likely be removed; the security of work is required without making the joint unnecessarily rigid; the driving of a nail is likely to split the timber; the joint is subjected to the vibrations and work done to be is in pieces.
9. Split ring connector and toothed ring connector are the examples of ___________
Explanation: The connectors are available in various other forms which can be used only under special circumstances. Split ring connector and toothed connected maybe either have teeth on single side or both the sides. The connectors are widely used in the construction of timber arches, trusses and similar other structures.
10. A wire nail is also known as ____________ and it is very tough and strong.
a) Clout nail
b) Lath nail
c) French nail
Explanation: Whereas, a clout nail has large, flat, circular ahead. Lath nail has a square and tapering shank with rough sides. Trenail is a pin of hard wood and can be used in piece of Iron nails where it is feared that the Iron nails would rust and injuries the timber.
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.