Explore topic-wise MCQs in Concrete Technology.

This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your Concrete Technology knowledge and support exam preparation. Choose a topic below to get started.

1.

Minute spherical bubbles of size ranging from ______________ microns.

A. 1-100
B. 5-80
C. 15-20
D. 50-60
Answer» C. 15-20
Discussion
2.

Retarders used at grouting oil wells, where temperature is about _____________ oC.

A. 100
B. 150
C. 200
D. 250
Answer» D. 250
Discussion
3.

Setting time of cement increases by adding ____________

A. Gypsum
B. CaCl2
C. NaOH
D. Hydrogen peroxide
Answer» B. CaCl2
Discussion
4.

At normal temperatures addition of sugar _____________ per cent have little effect on the rate of hydration.

A. .5-1
B. 1-2
C. .05-.1
D. .1-.2
Answer» D. .1-.2
Discussion
5.

Retarders are used to ___________

A. Offset the accelerating effect of cold weather on the setting of concrete
B. Offset the accelerating effect of hot weather on the setting of concrete
C. Offset the Retarding effect of cold weather on the setting of concrete
D. Offset the Retarding effect of hot weather on the setting of concrete
Answer» C. Offset the Retarding effect of cold weather on the setting of concrete
Discussion
6.

Zinc is the example of retenders.

A. True
B. False
Answer» B. False
Discussion
7.

NaOH is the example of retenders.

A. True
B. False
Answer» C.
Discussion
8.

MINUTE_SPHERICAL_BUBBLES_OF_SIZE_RANGING_FROM________________MICRONS.?$

A. 1-100
B. 5-80
C. 15-20
D. 50-60
Answer» C. 15-20
Discussion
9.

RETARDERS_USED_AT_GROUTING_OIL_WELLS,_WHERE_TEMPERATURE_IS_ABOUT_______________OC.?$

A. 100
B. 150
C. 200
D. 250
Answer» D. 250
Discussion
10.

Setting time of cement increases by adding ___________?

A. Gypsum
B. CaCl<sub>2</sub>
C. NaOH
D. Hydrogen peroxide
Answer» B. CaCl<sub>2</sub>
Discussion
11.

Pick up the correct statement from the following.

A. Calcium fluosilicates acts as a retarders
B. CaCl<sub>2</sub> acts as a retarders
C. Gypsum acts as a retarders
D. Gypsum acts as an accelerators
Answer» D. Gypsum acts as an accelerators
Discussion
12.

At normal temperatures addition of sugar _____________ per cent have little effect on the rate of hydration

A. .5-1
B. 1-2
C. .05-1
D. .1-.2
Answer» D. .1-.2
Discussion
13.

Retarders are used to:

A. Offset the accelerating effect of cold weather on the setting of concrete
B. Offset the accelerating effect of hot weather on the setting of concrete
C. Offset the Retarding effect of cold weather on the setting of concrete
D. Offset the Retarding effect of hot weather on the setting of concrete
Answer» C. Offset the Retarding effect of cold weather on the setting of concrete
Discussion
14.

“NaOH is the example of retenders”. Is it true or false?$

A. True
B. False
Answer» C.
Discussion
15.

What is retender?

A. Which speed up the initial set of concrete
B. Which delays the initial set of concrete
C. Which speed up the final set of concrete
D. Which delays the final set of concrete
Answer» C. Which speed up the final set of concrete
Discussion
16.

What is accelerator?

A. Which speed up the initial set of concrete
B. Which delays the initial set of concrete
C. Which speed up the final set of concrete
D. Which delays the final set of concrete
Answer» B. Which delays the initial set of concrete
Discussion