Theory of Machine
Balancing of rotating and reciprocating parts of an engine is necessary when it runs at

Moderate speed
Any one of these
Highs peed
Slow speed

ANSWER DOWNLOAD EXAMIANS APP

Theory of Machine
Kinematic pairs are those which have

Two elements that permit relative motion
Point or line contact between the two elements when in motion
Surface contact between the two elements when in motion
Elements of pairs not held together mechanically

ANSWER DOWNLOAD EXAMIANS APP