1. Which of the following is a hand tool used for quarrying?
a) Plier
b) Hammer
c) Quarrying wire
d) XSM
Discussion
Explanation: Plier is not used in quarrying. Quarrying wire is used for cutting stones at a site. XSM is a manufacturer of quarrying machines. Hammer is used to split rocks.
2. What is the relation between LLR (Line of Least Resistance) and amount of explosives
to be used?
a) Higher the LLR, higher the amount of explosive
b) Higher the LLR, lesser the amount of explosive
c) 10% more explosive for every 1m of LLR
d) 10% less explosive for every 1m of LLR
Discussion
Explanation: LLR is the shortest distance travelled by the expelled gasses on blasting through a path which offers least resistance. Therefore, higher amount of explosives will result in higher LLR.
3. Which of the following is not an explosive used for blasting?
a) Gelignite
b) Gunpowder
c) Flash powder
d) Nitrocellulose
Discussion
Explanation: Flash powder is used primarily in fireworks and theatrical pyrotechnics. The other three are widely used in the quarrying field.
4. What is sand blasting?
a) Process of making carvings on stone surface
b) Quarrying technique
c) Dressing type
d) Process of using sand to blast stone surface
Discussion
Explanation: It’s used to carve or clean a surface with a high velocity jet of abrasive material (sand, walnut, steel bits, etc..).
5. What is used to accelerate the process of rubbing in rubbed finish dressing?
a) Water
b) Water and sand
c) Clay
d) Pebbles
Discussion
Explanation: In rubbed finish dressing, a piece of stone is rubbed against a surface or machine. Water and sand together act as accelerators and help in the rubbing action.
6. Dressing of stones is carried out to:
a) To provide employment to people
b) To make transport of stones to site easy and economic
c) To reduce water content of stone
d) To avoid further works on the stone
Discussion
Explanation: Dressing reduces the excess weight of the stone and helps in easy transport from the quarry to the site of use, also proving the process to be economic.
7. How many types of dressings are there with respect to the place of work?
a) 4
b) 3
c) 2
d) None
Discussion
Explanation: There are two types of dressings based on the place of work. They are quarry dressing and site dressing. Quarry dressing is carried out right after quarrying whereas site dressing is done after transporting the quarried rock to the site.
8. Circular finished stones are generally used for:
a) Pillar
b) Tombstone
c) Landscaping
d) Column
Discussion
Explanation: Circular finish dressing yields in a stone with a surface that is round and circular. This is exactly the type of dressed stone which meets the requirements of stone required for column construction.
9. Quarry faced finished stones are also called:
a) Reticulated finish
b) Hammer faced finished
c) Rock faced stones
d) Plain finish
Discussion
Explanation: Quarry faced finished stone is directly available from the quarry and has a smooth surface. It doesn’t require any further dressing. They are also called self-faced stones.
10. Dynamite is a more effective explosive than gelignite.
a) True
b) False
Discussion
Explanation: Gelignite is more convenient to use and can be used underwater also. Hence, it’s effective than dynamite.