This is Automobile Engineering MCQ page-16.

Automobile Engineering MCQ page-16
Question 151:- The material used for inlet valve is usually (a) silico-chrome steel (b) austinic steel (c) precipitation-hardening steel (d) nimonic alloy

Question 152:- Most commonly used valve-actuating mechanism in modem cars is (a) side valve mechanism (b) overhead valve mechanism (c) overhead inlet and side exhaust valve mechanism (d) none of these

Question 153:- The engine valves are closed by (a) crankshaft (b) camshaft (c) timing device (d) valve spring

Question 154:- The camshaft controls (a) valve opening (b) valve closing (c) valve liming (d) all of these

Question 155:- How many times in a minute does each valve on a four stroke engine running at 2000 RPM open and close? (a) 1000 (b) 2000 (c) 4000 (d) 6000

Question 156:- The camshaft drive which does not require lubrication is (a) chain drive (b) gear drive (c) toothed rubber belt (d) none of these

Question 157:- The push rod is located between the (a) valve and valve spring (b) valve and rocker arm (c) tappet and rocker arm (d) none of these

Question 158:- A says that rocker arms reverse reciprocating motion while B says that rocker arms convert rotating motion to reciprocating motion. Who is right? (a) A (b) B (c) Both are right (d) Both arc wrong

Question 159:- A asserts that intake valves are cooled while they are open. However. B states that exhaust valves are heated while they are open. Who is right? (a) A (b) B (c) Both are right (d) Both are wrong

Question 160:- The exhaust valve usually starts opening (a) at BDC (b) at TDC (c) before BDC (d) before TDC