Directions: The following item consist of two statements one labeled as ‘Assertion A’ and the other labeled as ‘Reason R’. You are to examine these two statements carefully and decide if the Assertion A and the Reason R are individually true and if so whether the reason is a correct explanation of the Assertion. Select your answers to these items using the codes given below and mark your answer sheet accordingly.
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is NOT the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
Assertion (A): For high - speed turning of magnesium alloys the coolant or cutting fluid preferred is water miscible mineral fatty oil.
Reason (R): As rule water - based oils are recommended for high – speed operations in which high temperatures are generated due to high frictional heat. Water being a good coolant the heat dissipation is efficient