722. Unit of viscosity in CGS system is
A. Gm .cm⁻¹ sec⁻¹
B. Gm . cm² . sec⁻²
C. Gm .cm⁻², sec⁻¹
D. Gm . cm . sec⁻¹
✅ The correct answer is option A.
725. Good design of the casing of a centrifugal pump aims at minimising the
A. Cavitation
B. Frictional losses
C. Kinetic energy loss
D. Static head
✅ The correct answer is option C.
728. In extrusion of metals, which of the following statement is true ?
A. Speed of the extruded material is same as that of ram speed
B. Redundant work is a function of the die angle
C. Relative motion between the billet surface and the container wall is always present
D. Hollow ram is used for indirect extrusion
✅ The correct answer is option D.
731. For dynamic strain measurement, the wheatstone bridge used is of __________ type.
A. Voltage sensitive null
B. Voltage sensitive deflected
C. Current sensitive deflected
D. None of these
✅ The correct answer is option B.
734. A material is capable of resisting softening at high temperature, because of its property termed as
A. Hot temper
B. Hot hardness
C. Fatigue
D. Creep
✅ The correct answer is option B.
737. Blast furnace slag is mainly molten
A. Sand
B. Magnesium silicate
C. Calcium silicate
D. Iron pyrite
✅ The correct answer is option C.
703. Minimum diameter of the tube used for making water manometer should be __________ mm to avoid a correction for the effect of capillarity.
A. 1
B. 2.5
C. 4
D. 6
✅ The correct answer is option D.
705. Metal shots used in shot blasting are made of
A. Stellite
B. Steel
C. Bronze
D. Lead
✅ The correct answer is option B.
707. The most commonly used combustion system manufactured in India for the thermal power plant boilers is the __________ combustion system.
A. Pulverised fuel
B. Travelling grate stoker firing
C. Circulating fluidised bed
D. Fluidised bed
✅ The correct answer is option A.
709. Which of the following is an example of stress corrosion ?
A. Season cracking of brass
B. Caustic embrittlement of steel
C. Both (a) & (b)
D. Neither (a) nor (b)
✅ The correct answer is option C.