Interview Question and Answer | Knowledge | Part 2 | Gate | 2021 Update |

 Basic Interview Questions 

• IS code Specified for Mandrel dia for Bend and Re-bend test is

1. IS 1788
2. IS 1768
3. IS 1786
4. IS 1746

• Tolerance for Nominal Mass for 25mm dia Bar ____

1. ± 2%
2. ± 3%
3. ± 4%
4. ± 8%

• what is the % of strength of concrete with time ? imp

- After 1 day - 16%, 3 days- 40%, 7days- 65%, 14 days-90%, 28 days-99%

• For dia 20mm, Mandrel dia used for Bend test [Fe500] =_____   [IS 1786]

1. 2 ⌀
2. 4 ⌀
3. 5 ⌀
4. 8 ⌀

• Maximum percentage of Carbon in TMT Bar is _____

1. 0.25 %
2. 0.9 %
3. 0.4 %
4. 0.15 %

• Whatis the size of the mould used to measure the compressive strength of cement ?

1. 150mm x 150mm x 150mm
2. 90mm x 90mm x 90mm
3. 70.6mm x 70.6mm x 70.6mm
4. 45mm x 45mm x 45mm 

• Bar sample Bent at _____° angle for Re-bend test  (Most IMP)

1. 45-90
2. 120-145
3. 120-135
4. 135-157.5

• Which instrument is used to measure Specific Gravity ?

1. Gyrometer
2. Hydrometer
3. nanometer
4. Gravitymeter

• Length of Bar Taken for Rolling Margin is 

1. 2m
2. 1m
3. 6m
4. 3m

• What is the factor that helps in converting wet concrete volume to dry concrete volume?

1. 1.27
2. 1.32
3. 1.43
4. 1.54

• IS code for bend Test of Bar is 

1. IS 456;2000
2. IS 800:2000
3. IS 1599
4. IS 1997

• Which code we use for concrete mix design ?

1. IS 10390
2. IS 800:2000
3. IS 10540
4. IS 10262

• Bar sample for bend test, Bent at ____° angle [IS 1599]

1. 45
2. 90
3. 180
4. 270

• What is the weight of Cube of size 150mm x 150mm x 150 mm?

1. 8.1 kg
2. 1.8 kg
3. 4.5kg
4. 6.5kg

• As per US Gallon, 1 Gallon equals how much liters?

1. 5 liters
2. 4.785 L
3. 3.785 L
4. 2.87 L

• Which IS code illustrates about the Earthquake force ?

1. IS 10370
2. IS 17380
3. IS 1893
4. IS 1945

• How to convert Cubic meter to cubic feet?

1. Multiplying by 22.4
2. Multiplying by 33.9
3. Multiplying by 35.32
4. Multiplying by 12.65

• What is the direction of main and Distribution bar in RCC Slab?

- Main bar in Shorter span and Distribution bar in longer span.

• What is the use of 3-4-5 method in construction sites?

- This method used for sitting out plan accurately at right angle

• Which zone sand is suitable for plaster ?

- Zone - 3

• What is End Bearing Pile ?

- If the supports the load primarily by resistance developed at the pile tip or base.

• Why we provide Alternate Bent up bar in slab ?

- To resist Negative Bending Moment.

• What is Bentonite ?

- It is Montmorillonite clay with a very high Liquid limit.

• What is meaning of 43 grade, 53 grade on Cement Bags?

- It indicates Compression strength of cement after 28 days of setting.

• What is the minimum recommended diameter of bored cast in-situ pile ?

- As per [IS 2911, Part-1, Section-2] the min recommended dia of pile is 450mm