Top 150+ Solved Maintenance and Rehabilitation of Structures MCQ Questions Answer
Q. What is a frequency range for ultrasonic test?
a. 15-125 kHz
b. 15-175 kHz
c. 50-175 kHz
d. 15-100 kHz
Q. What is minimum size of core sample in core sampling method?
a. 110 mm
b. 100 mm
c. 50 mm
d. 120 mm
Q. Which component in sea water is responsible for the erosion in concrete?
a. calcium hydroxide
b. sulfate
c. a & b both
d. none of the above
Q. Due to the sulfate attack calcium sulfate is generates inside the concrete.
a. true
b. false
c. none
d. all
Q. What is main component of acid rain?
a. sulfuric acid
b. nitric acid
c. a & b both
d. none of the above
Q. Which factors affect the carbonation of the concrete?
a. grade
b. permeability
c. relative humidity
d. all of the above
Q. How much SO3 is necessary in concrete to reduce its erosion?
a. < 0.04 m
b. >0.04 m
c. 0.05 m
d. < 0.05m
Q. Alkaline aggregate reaction is main reason for generation of K2O inside the concrete.
a. true
b. false
c. none
d. all
Q. Which compound is responsible for sulfate attract inside a concrete?
a. gypsum
b. K2O
c. K3O
d. none of the above
Q. Which compound is responsible for efflorescence inside a concrete?
a. Ca(OH)2
b. K2O
c. K3O
d. none of the above
Q. Which factor does not affect the thermal conductivity of the concrete?
a. humidity
b. volume
c. density
d. temperature