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In diesel cycle engine the combustion takes place at
(A) Constant temperature

(B) Constant volume

(C) Constant pressure (D) Constant pressure & temperature

The dwell angle on a three cylinder engine compared to four-cylinder engine is

(A) More (B)

(C) Same (D) May be more or less

Less

In a four stroke engine, in which of the following condition its stroke is increased ?

(A) Connecting rod is lengthened (B)

(C) Crank throw increased (D) Crank throw decreased

A four cylinder engine has a capacity of 2.8 Liters an

cylinder is 100 ണ്‌, what is its compression ratio ?
(^) 7:1 (8)
(C) 10:1 (D)

The fluctuation of engine speed during cycle of operation

(A) Power output (B)
(C) Mass of crank shaft (D)

The distance between axis of the piston pin and the top 081

(A) Throw height (B)
(C) Height of piston D)

Piston

8:1
14:1

Spee

is shortened

its clearance volume in one

lepends upon

of fly wheel

Mass of fly wheel

Ring land height

Which of the following is NOT a type of piston pin fastening method

(A) Semi floating (B) Fully floating

(C) Three quarter floating (D) Set screw type
The piston skirt clearance at room temperature is about

(A) 0.008 mm (B) 0.08 mm

(C) 040 mm (D) 0.04mm

as
(^) Stroke volume (B)

(A) 0.001 mm (B)

(©) 010mm (D) 0.05mm

Piston displacement
(C) Swept volume (D) All of these

The maximum permissible ovality in an engine cylinder is usually

0.01 mm

he piston crown is called
Compression height

The cross sectional area of one cylinder of an engine is multiplied by its stroke is known

~ 06/2022

[P.T.O.]