ഛെ

8,

10.

11

12.

13.

14.

18.

The percentage of carbon in cast iron usually varies between :

∣ (B)o.5w1.o%
A) 002%
6 4 ೦ 2.5%. @) ೩.5 08.5%

Martensite is a supersaturated solution of carbon in :
(മ Alpha iron (B) Betairon
(@) Gamma iron (D) Delta iron

Dislocation in materials is a ———— defect.

(ಯ) Point (B) Line
(¢) Plane - (D)Volumetric

The head over a 90° V-notch increases from 0.15 to 0.3 m. The ratio of the new discharge to
the original discharge is :

(ல 1414 (8) ೩25

(0 4.00 യ 5.687

A floating body will remain in stable equilibrium so long as :
(ಸ) the metacentre M lies below the centre of gravity
(B) the metacentre M lies above the centre of gravity
(C) the metacentre and centre of gravity remain at the same position
(D) None of these

The nominal thickness of boundary layer represents the distance from the surface to a point
where :

(ക) the flow ceases to be laminar

(B) velocity is 99 percent of its asymptotic limit

(C) the shear stress becomes maximum

(D) the flow behaves as if it were rotational

A pitot-tube is an instrument for measuring :
(മ) pressure of flow (B) discharge of fluid
(C) veloeity of flow (D) total energy

The specific speed Ns = (५५६ (714 for ೩ double suction pump is to be evaluated. The
discharge would be taken :

(ക) half the actual discharge ല്‍) actual discharge

(൪ double the actual discharge ‏اا‎ square of the actual discharge

147/2015 4 3 A