Civil Engineering – Concrete Technology Mock test – 1 Welcome to your Concrete technology Mock test - 1 Take an exciting test in Concrete Technology You have only 20 mins to complete the test (25 Questions) Wish you all the best!!! Name Email 1) Wp and Wf are the weights of a cylinder containing partially compacted and fully compacted concrete. If the compaction factor Wp/Wf is 0.95, the workability of concrete is A. extremely low B. very low C. low D. high E. none of these.2) For given water content, workability decreases if the concrete aggregates contain an excess of A. thin particles B. flat particles C. elongated particles D. flaky paticles E. all the above.3) M10 grade of concrete approximates A. 1 : 3 : 6 mix B. 1 : 1 : 2 mix C. 1 : 2 : 4 mix D. 1 : 1.5 : 3 mix4) For ensuring quality of concrete, use A. single sized aggegates B. two sized aggregate C. graded aggregates D. coarse aggregates.5) According to I.S. : 456, the number of grades of concrete mixes, is A. 3 B. 4 C. 5 D. 6 E. 76) The mixture of different ingredients of cement, is burnt at A. 1000°C B. 1200°C C. 1400°C D. 1600°C E. 1800°C7) After casting, an ordinary cement concrete on drying B. mix C. shrinks D. none of these.8) To obtain cement dry powder, lime stones and shales or their slurry, is burnt in a rotary kiln at a temperature between A. 1100° and 1200°C B. 1200° and 1300°C C. 1300° and 1400°C D. 1400° and 1500°C E. 1500° and 1600°C9) The standard sand now a days used in India, is obtained from A. Jaipur (Rajasthan) B. Jullundur (Punjab) C. Hyderabad (Andhra Pradesh) D. Ennore (Madras) E. Cuttuck (Orissa).10) While compacting the concrete by a mechanical vibrator, the slump should not exceed A. 2.5 cm B. 5.0 cm C. 7.5 cm D. 10 cm E. 15 cm11) An aggregate is said to be flaky if its least dimension is less than A. 1/5th of mean dimension B. 2/5th of mean dimension C. 3/5th of mean dimension D. 4/5th of mean dimension E. none of these.12) The increased cohesiveness of concrete, makes it A. less liable to segregation B. more liable to segregation C. more liable to bleeding D. more liable for surface scaling in frosty weather E. none of these.13) The commonly used material in the manufacture of cement is A. sand stone B. slate C. lime stone D. graphite.14) For the construction of cement concrete floor, the maximum permissible size of aggregate, is A. 4 mm B. 6 mm C. 8 mm D. 10 mm E. 12 mm15) The process of proper and accurate measurement of concrete ingredients for uniformity of proportion, is known A. grading B. curing C. mixing D. batching E. none of these16) The preliminary test is repeated if the difference of compressive strength of three test specimens, exceeds A. 5 kg/cm2 B. 8 kg/cm2 C. 10 kg/cm2 D. 12 kg/cm2 E. 15 kg/cm217) Pick up the correct proportions of chemical ingredients of cement A. Lime : Silica : Alumina : Iron oxide : 63 : 22 : 6 : 3 B. Silica : Lime : Alumina : Iron oxide : 63 : 22 : 6 : 3 C. Alumina : Silica : Lime : Iron oxide : 63 : 22 : 6 : 3 D. Iron oxide : Alumina : Silica : Lime : 63 : 22 : 6 : 318) Transport of concrete by pumps, is done for a distance of A. 100 m B. 200 m C. 300 m D. 400 m E. none of these.19) The high strength of rapid hardening cement at early stage, is due to its A. finer grinding B. burning at high temperature C. increased lime cement D. higher content of tricalcium.20) Vicat's apparatus is used for A. fineness test B. consistency test C. setting time test D. soundness test E. compressive strength test.21) M 150 grade of concrete approximates A. 1 : 3 : 6 mix B. 1 : 1 :2 mix C. 1 : 2 : 4 mix D. 1 : 1.5 : 3 mix E. none of these.22) Workability of concrete is measured by A. Vicat apparatus test B. Slump test C. Minimum void method D. Talbot Richard test.23) The rock which is not calcareous, is : A. lime stone B. macl C. chalk D. laterite E. none of thes24) Internal friction between the ingredients of concrete, is decreased by using A. less water B. fine aggregates C. rich mix D. more water and coarse aggregates E. none of these.25) For road pavements, the cement generally used, is A. ordinary Portland cement B. rapid hardening cement C. low heat cement D. blast furnace slag cement E. none of these.