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79. Under load operation, the turbine which is least efficient is
A) Pelton turbine B) Francis turbine
C) Kaplan turbin D) Propeller turbine

80,

81,

85,

87.

89.

A photovoltaic cell converts

A) Electromagnetic radiation directly into electricity
B) Solar radiation into thermal energy

C) Thermal energy into electricity

D) Al the above

The atomic packing factor for லா FCC crystal is

A) 0.68 B) 0.74 C) 0.78 D) 0.84
. Stacking fault is a
A) Point defect B) Line defect

©) Surface and grain boundary defect D) None of these

. Pearlite is a combination of

A) Ferrite and austenite B) Ferrite and cementite

C) Ferrite and graphite D) Cementite and gammairon
. The pattern material for investment mould casting is

A) Wood B) Plaster of Paris

C) Wax D) Aluminium

Pipes of large length and diameters are made by

A) Extrusi B) Slush casting

C) Pressed casting D) Semi-centrifugal casting

. Orthogonal cutting refers to cutting with
A) Least chip strain 8) Minimum radial force of cutting
C) Zero degree inclination angle D) Negative rake

Projection welding is

A) Single spot welding B) Multi-spot welding
C) Atype of arc welding D) Stud welding
USM is best suited for

A) Brittle materials B) Duclile materials
C) Non-ferrous alloys D) Plastics

A) Surface hardness B) Surface roughness
D) Gear tooth thickness

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