Top 250+ Solved Concrete Technology MCQ Questions Answer
Q. The construction joints in cement concrete
a. should be located where bending moment is large
b. should be located where shear force is large
c. should not be provided at the corners
d. should be spaced at a distance of 3 m apart in case of huge structures
Q. During field test, the cement is said to be pure and of good quality when
a. the colour of cement is uniformly greenish grey
b. a handful of cement, thrown into a bucket of water, floats
c. hand is thrusted into a bag of cement, it feels cool
d. all of the above
Q. The most useless aggregate is, whose surface texture is
a. smooth
b. glossy
c. granular
d. porous
Q. Which of the following statement is wrong?
a. The coarse sand produces a harsh and unworkable mix.
b. An admixture cannot increase the workability of concrete without increasing water content.
c. Salts of manganese cause a considerable reduction in the strength of concrete.
d. all of the above
Q. Insufficient quantity of water
a. makes the concrete mix harsh
b. makes the concrete mix unworkable
c. causes segregation in concrete
d. causes bleeding in concrete
Q. In the manufacture of cement, the dry or wet mixture of calcareous and argillaceous materials is burnt at a temperature between
a. 900? to 1000?C
b. 1000?C to 1200?C
c. 1200?C to 1500?C
d. 1500?C to 1600?C
Q. The practical utility of concrete technology for civil engineers is to
a. enable them to know how to stock properly the materials required for concrete
b. enable them to perform different tests concerning concrete
c. make them conversant with fundamental principles of concrete
d. all of the above
Q. Water-cement ratio is, usually, expressed in
a. litres of water required per bag of cement
b. litres of water required per kg of cement
c. both (a) and (b)
d. none of these
Q. With the moisture content of 5 to 10% by weight, the bulking of sand is increased by
a. 20%
b. 30%
c. 40%
d. 50%
Q. For continuous transportation of concrete, the method used is
a. transport of concrete by pans
b. transport of concrete by wheel barrows
c. transport of concrete by belt concrete conveyors
d. transport of concrete by pumps
Q. Which of the following statement is correct?
a. Duff Abram's law is valid only when the concrete is of workable plasticity.
b. If the water-cement ratio is less, the strength of concrete will be less.
c. The strength of concrete decreases with age.
d. A rich mix of concrete provides low strength than a lean mix.
Q. The function of aggregates in concrete is to serve as
a. binding material
b. filler
c. catalyst
d. all of these
Q. The breaking up of cohesion in a mass of concrete is called
a. workability
b. bleeding
c. segregation
d. creep
Q. Blast furnace slag cement is used for
a. dams
b. bridge abutments
c. retaining walls
d. all of these
Q. If the slump of concrete mix is 70 mm, its workability is considered to be
a. very low
b. low
c. medium
d. high