Chapter 3 MACHINING TIME MCQs 15 min Score: 0 Attempted: 0/15 Subscribe 1. . Machining time is represented by (A) td (B) tm (C) ta (D) tsShow All Answers 2. . ts represents (A) machining time (B) delay time (C) auxiliary time (D) set up timeShow All Answers 3. . Normally, this material can be machined without coolant. (A) brass (B) tool steel (C) mild steel (D) cast ironShow All Answers 4. . It minimizes friction between tool and workpiece during machining. (A) coolant (B) lubricant (C) air (D) both b&cShow All Answers 5. . It reduces wear and heat between the mating parts of a machine. (A) coolant (B) lubricant (C) air (D) both a&cShow All Answers 6. . It is a best cutting oil but very expensive. (A) soluble oil (B) mobil oil (C) crude oil (D) lord oilShow All Answers 7. . Fixed oil is composed of. (A) animal oil (B) fish oil (C) vegetable oil (D) all of aboveShow All Answers 8. . Soluble oils are known as (A) enamels (B) emulsions (C) crude oil (D) none of aboveShow All Answers 9. . For ferrous metals of medium hardness, the oil to water ratio for making water soluble cutting oil is. (A) 1:10 (B) 1:20 (C) 1:20 (D) 1:40Show All Answers 10. . For medium grinding operations, the oil to water ratio for making water soluble cutting oil is. (A) 1:10 (B) 1:20 (C) 1:20 (D) 1:40Show All Answers 11. . In threading, oil is used (A) pure mineral oil (B) animal oil (C) mineral oil & additives (D) both a&bShow All Answers 12. . The expression for actual machining time is given by tm = (A) L/(F×N) (B) L(F×N) (C) L/(F+N) (D) (L×F)/NShow All Answers 13. . The time spent in personal needs of the worker. (A) machining time (B) delay time (C) set up time (D) auxiliary timeShow All Answers 14. . Graphite powder is a (A) metal (B) coolant (C) alloy (D) lubricantShow All Answers 15. . Function of coolant is to (A) reduce friction (B) cool the tool & job (C) improve surface finish (D) all of aboveShow All Answers
