218. For steel castings, the following type of sand is better
A.Fine grain
B.Coarser grain
C.Medium grain
D.All are equally good

---

219. As the size of castings increases, it is often better to use increasingly
A.Fine grain
B.Medium grain
C.Coarse grain
D.Any one of the above

---

220. The purpose of riser is to
A.Feed the casting at a rate consistent with the rate of solidification
B.Act as a reservoir for molten metal
C.Help feed the casting until all solidification takes place
D.Feed molten metal from pouring basin to gate

---

221. Slick is
A.A round sieve
B.A long, flat metal plate fitted with an offset handle
C.Used to make or repair corners in a mould
D.Used to scoop sand deep in mould

---

222. Hot tear refers to
A.Casting defect
B.Process of fabrication
C.Process of heat treatment
D.Weathering of non-ferrous materials

---

223. Slick in a foundry shop is used to
A.Make and repair corners in a mould
B.Thoroughly mix up moulding sand
C.Make venting holes in the mould
D.Prepare gates

---

224. True centrifugal casting
A.Is used to ensure purity and density at extremities of a casting
B.Is used to cast symmetrical objects
C.Is used to obtain high density and pure castings
D.Uses a heavy cast iron mould to act as chill

---