Which of the following sprayers works on the same principle as the rocker sprayer?

Correct option is D

Correct answer – (d)
Pedal pump sprayer uses the same reciprocating pump principle.
Information Booster / Facts
Both are manually operated sprayers.
Why other options are incorrect
(a) Knapsack sprayer uses air compression.
(b) Wheel-barrow sprayer uses tank pressure.
(c) PTO sprayer uses tractor power.