The plunger is held against at …. to the smooth concrete surface

The plunger is held against at ______ to the smooth concrete surface, firmly supported and pressed.

A) 45°
B) 60°
C) 75°
D) 90°

ANSWER= (D) 90°
Explain:- Correct answer for question The plunger is held against at ______ to the smooth concrete surface, firmly supported and pressed is (D) 90°
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