A solution of _____ can be used to remove efflorescence that cannot be removed by washing the wall with water.
A. three parts vinegar to one part water
B. two parts glycolic acid to one part water
C. one part hydrochoric acid to five parts water
D. one part muriatic acid to nine parts water
Answer: D
You might also like to view...
¿Cuál es la temperatura máxima a la cual puede utilizarse la espuma de poliuretano in situ?
a. 150 °F (65,55 °C) b. 175 °F (79,44 °C) c. 250 °F (121,11 °C) d. 500 °F (260 °C)
Which of the following is not an advantage of wood as a building material?
a. It is relatively light in weight, but durable. b. It is easily worked. c. It is immune to damage from insects and weather. d. It is immune to corrosion.
Under design conditions, the room air conditioner uses an evaporative condenser to reject heat.
Answer the following statement true (T) or false (F)
Find v? in the circuit of Fig. 7.112 when vs = 30u(t) V. Assume that v?(0) = 5 V.
 FIGURE 1.png)