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600+ Automobile Engineering MCQ page-13

Question 121:- In a six-cylinder engine, the power impulse occurs after ‘x’ degrees of crankshaft rotation, where ‘x’ is
(a) 90
(b) 120
(c) 240
(d) 360

Question 122:- Firing order of a 6-eylinder in-line engine is usually
(a) 1-5-3-6-2-4
(b) 1-6-3-5-2-4
(c) 1-4-3-2-6-5
(d) 1-3-6-2-4-5

Question 123:- The cylinder bores of aluminum alloy cylinder blocks arc usually plated with
(a) steel
(b) brass
(c) chromium
(d) molybdenum

Question 124:- The angle between the cylinder axes and the crankshaft centre line in an engine is
(a) 60
(b) 90
(c) 120
(d) 180

Question 125:- Most difficult gasket sealing problem occurs at the
(a) head
(b) oil pan
(c) liming cover
(d) intake manifold

Question 126:- Each time a joint is assembled, it is recommended to replace
(a) cork gaskets
(b) asbestos gaskets
(c) rubber gaskets
(d) all gaskets

Question 127:- Flat bottomed inlet manifolds are commonly used in car engine to
(a) allow space for two runner levels
(b) increase fuel evaporation in the manifold
(c) provide uniform air-fuel mixture to various cylinders
(d) maximise the cross-sectional area for the given wall surface area of the manifold

Question 128:- The oil pan in an engine may be made of
(a) steel or aluminum
(b) steel or cast iron
(c) cast iron or brass
(d) cast iron or zinc

Question 129:- A dish in the piston head is employed to
(a) decrease piston weight
(b) provide valve clearance
(c) control compression ratio
(d) adjust piston displacement

Question 130:- The largest diameter of a cam ground piston is
(a) along piston pin axis
(b) at the piston land
(c) at 45° to the piston pin axis
(d) al 90° to the piston pin axis


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