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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

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