NAVY OAR Mechanical comprehension Questions
with Complete Solutions (Latest 2025)
What provides mechanical advantage? - Correct Answers
✅Movable pulleys
Gear Revolutions [Formula] - Correct Answers ✅r = (D*R)/d
; r*d = R*D
Gear Revolutions - Correct Answers ✅D: # of teeth on gear
A
R: revolutions of gear A
d: # of teeth on gear B
r: revolutions of gear B
Hydrometers - Correct Answers ✅Use floats to measure
specific gravity
Specific gravity - Correct Answers ✅weight of a liquid as
compared with the weight of water
LEVERS - Correct Answers ✅first class, second class, third
class
fulcrum - Correct Answers ✅The fixed point around which a
lever pivots
Effort - Correct Answers ✅input force
with Complete Solutions (Latest 2025)
What provides mechanical advantage? - Correct Answers
✅Movable pulleys
Gear Revolutions [Formula] - Correct Answers ✅r = (D*R)/d
; r*d = R*D
Gear Revolutions - Correct Answers ✅D: # of teeth on gear
A
R: revolutions of gear A
d: # of teeth on gear B
r: revolutions of gear B
Hydrometers - Correct Answers ✅Use floats to measure
specific gravity
Specific gravity - Correct Answers ✅weight of a liquid as
compared with the weight of water
LEVERS - Correct Answers ✅first class, second class, third
class
fulcrum - Correct Answers ✅The fixed point around which a
lever pivots
Effort - Correct Answers ✅input force
