28.

31.

A fixed point of reference of known elevation is « 53 ⋅

⋅↾∎∣⊳⊐∥≸∙⇁⋅⋃∣⋣↘⊲∥⊓⊏ (8) station point (€) bench mark (D) datum

An imaginary line tangential to the longitudinal curve ‏أله‎ the bubble tube at its middle point
is called :

)۸( Axis of telescope (ए) ~^ of level tube

(C) Level line (D} Line of collimation

The collimation method for obtaining the reduced levels of points does not provide a check
೧7;

(ക) foresight (छ) back sight

(€) change point (11) intermediate point

I'he method of surveying in which field work and plotting work are done simultaneously, is
called

(A) Compass surveying (B) Levelling
(C) Plane tabling (ப) Chain surveying

It 15 the property of a material due to which it can undergo permanent deformation without
failure ;

(ಗಿ) plasticity (8) 5011೧059 (C) formability (1) toughness

Pick up the wrong statement :

(A) Two stroke engine can run in any direction.

(8) In four stroke engine, a power stroke is obtained in four strokes.

(€) Thermal efficiency of four stroke engine is more due to positive scavenging.

(ए) Petrol engines occupy more space than diesel engines for same power output.

33. Diesel engine can work on very lean air fuel ratio of the order of 31 : 1. A petrol engine can
also work on such a lean ratio provided :
{A) itis properly designed (8) 15655 quality fuel is used
(C) cannot work as it is impossible 0) fly wheel size is proper
‏مسا‎ 6 A