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The firing order of a 6 cylinder diesel engine is
i. 1 -5-3-6-2-4

ர்‌. 1-4-2-6-3-5
iii, 1-6-5-3-2-4
iv. 1-3-4-2-6-5
A) ionly B) both ii and iii
C) both ii and iv D) both i and ii

The qualities of a bearings are
i. Fatigue strength
ii. Embedability
iii. Conformability
iv. Thermal conductivity
A) both ii and iii B) both i and iv
C) all of these i, ii, iii and iv D) bothi andii

Which statement is correct ?
i. Water pump is driven by engine pulley.
ii. Thermostat valve is fitted between water outlet of the cylinder head and the
inlet of the radiator.
iii. Radiator cores are made of high carbon steel.
iv. Inter cooler is the part of cooling system.

A) bothi and ii B) both i and iv

C) all of these i, ii, iii and iv D) both ii and iii

Inlet valves are made to open certain degree earlier than TDC is called
A) Lag B) Lead

C) Overlap D) Timing

Which statement is wrong ?
i. The Gudgeon pin is supported on piston pin boss.
ii. In a piston minimum number of compression rings are 2.
iii. The portion below the Gudgeon pin is called land.
iv. Compression rings are made of stainless steel.
A) ionly B) ii only
C) Both ii and iv D) Both iii and iv

What are the causes of high oil consumption in an engine ?
A) Worn out piston and cylinder wall

B) Excessive backlash in timing gear

C) Worn out pump rotors

D) Worn out camshaft bearings