Dave

Q$-14$ Strian in a given materal is the ratio of

a$)$ Change in dimension to original dimension

b$)$ Applied load to original dimention.

c$)$ change in dimension to the area of cross section or opposing the load.

d$)$ Applied load to the area of cross section opposing the load.

Q$-15$ Shrinkage cavities in sand casting is caused by

a$)$ Fauty moulding flask

b$)$ Poor casting design

i$)$ Higher pouring temprature

d$)$ Lower strength of Solidified metal.

Q$-17$ To reduce the risering requirement in sand casting

a$)$ use a runner extenion

b$)$ use a riser Sleeve

c$)$ use a strainer core

d$)$ none of these

Q$-18$ In sand casting, shrinkage allowance is added

a$)$ Only the exterior dimensions.

b$)$ Only the dimension that are Perpendicular to the parting Plane

c$)$ All linear demension

d$)$ Only the interior dimension.

Q$-19$ To improve the directional Solidification for difficult casting geometries, use a

a$)$ runner extension

b$)$ chill

c$)$ Step gate

d$)$ Parting gate