47,

49.

506.

51.

52.

58.

54.

58.

The C.I. engine pistons are generally made ज

(A) Aluminium alloy (B) Stainless steel
() Copper 10) வண

White metal is an alloy used in diesel engines to manufacture :
(ക) Connecting rod bolts (B) Exhaust valve
{C) Main bearing (D) Engine body

Cylinder liners are subjected to extreme heat of combustion and it has to permit the piston
and piston rings with minimum friction, The material suitable for making liners 15 :

(A) Heat resistant steel (B) Close grained cast iron

(0 Copper Alloy (D) ‏نع‎ Aluminium

Valve clearance or tappet clearance is provided to :
(4) Allow thermal expansion of valve mechanism
(B) Reduce noise
(C) Increase thermal efficiency
(D) Reduce wear and tear of valve mechanism

Butt clearance or piston ring end gap is the distance between the ends of piston ring :
(A) kept on a plane surface
(B) at the time of manufacture
(C) inserted inside the cylinder
(D) stretched with a specific amount of force

Which is to be checked 'daily’ to ensure trouble free running of a diesel engine?

(2) Tappet clearance 18) Crank shaft deflection

(0 Lubricating oil properties (D) Crank case lubricating oil level
Most suitable maintenance system suitable for efficient running of diesel engine plant is :

(ക) advance maintenance system (B) break down maintenance system

(C) continues maintenance system (D) planned maintenance system

A four stroke six cylinder in line compression ignition engine is running at 400 rpm. Then the
engine camshaft is running at :

(4) 200 (B) 300
(0 400 ⋅ @) 800
A tachometer is a device used for measuring :
(A) Wind speed © Deflection
(C) Speed to rotation (D) प्ल consumption
9 16/2018

[P.T.0.]