1000+ Materials Science Objective Questions and Answers Pdf - 2

Question: 6

Which motor is considered as most suitable for hoists and cranes

(A) Series

(B) Cumulative compound

(C) DC shunt, constant speed

(D) DC shunt, adjustable speed

Question: 7

Coulomb’s law for the force between electric charges most closely resembles with

(A) Newton’s law of gravitation

(B) Gauss’s theorem

(C) Law of conservation of energy

(D) Newton’s law of motion

Question: 8

A tuning fork in a case of

(A) frequency being independent of temperature

(B) vibrations of a rod rich in overtones

(C) two fixed free rods with transverse vibrations

(D) a rod with longitudinal vibrations

Question: 9

Ultrasonic coagulation is

(A) changing frequency from ultrasonic to subsonic

(B) changing frequency from subsonic to ultrasonic

(C) bonding of small particles into large aggregates

(D) cleaning of objects using ultrasonic waves

Question: 10

Which of the following curve cannot have parallel tangents

(A) circle

(B) ellipse

(C) hyperbola

(D) all of the above