SSC-JUNIOR ENGINEER (Civil & Structural) Online Exam 2019 (Part-IV)

Total Questions: 50

11. Which of the following is a plantation type of crop?

Correct Answer: B. Tea
Solution:A plantation is a large-scale estate, generally centered on a plantation house, meant for farming that specializes in cash crops. The crops that are grown include cotton, coffee, tea, cocoa, sugar cane, opium, sisal, oil seeds, oil palms, fruits, rubber trees and forest trees.

12. Red light used as signal for stop as it is visible from greater distances than other colours because of its:

Correct Answer: C. longest wavelength and low frequency compared to any other colour on visible spectrum
Solution:In traffic signals red colour light is used to stop vehicles because it is having longer wave length. The colour which is having longer wavelength will undergo lesser scattering, hence it is visible from a longer distance. The primary reason why the colour red is used for danger signals is that red light is scattered the least by air molecules.

The effect of scattering is inversely related to the fourth power of the wavelength of a colour. Therefore blue which has the least wavelength of all the visible radiations is scattered the most and red which has the highest wavelength of all the colours we can see is scattered the least. So red light is able to travel the longest distance through fog, rain, and the alike.

13. Keeping other parameters unchanged for a compression member in steel, which buckling class section carries maximum axial compressive stresses comparatively?

Correct Answer: A. (a)
Solution:No explanation given in the book

14. Estimate the quantity of brick masonry required for construction of a room of 4m × 3 internal dimensions. Thickness of wall should be 250 mm. Two windows of 2m × 1.5 m and one door of 1.5m × 2.2 m is to be provided to the room. Height between top of plinth beam and bottom of slab beam should be 4 m.

Correct Answer: B. 12.675 m³
Solution:

15. The maximum area of tension reinforcement in a rectangular beam shall not exceed _____ where 'b' is width, 'D' is overall depth and 'd' is effective depth.

Correct Answer: D. 
Solution:

16. Who is known as the father of soil mechanics?

Correct Answer: B. Karl von Terzaghi
Solution:No explanation given in the book

17. 'Deadman' is a term related to calculating quantities of:

Correct Answer: D. excavation/earthwork
Solution:The "Deadman" is selected as an "Anchor type" in the combo list in the dialog window "New anchor".

The deadman anchor requires the input of:

  • Location of anchor depth, length, spacing.
  • Stiffness of anchor anchor diameter d, or area of anchor A, elasticity modulus.

18. Four columns are identical in all parameters except end conditions. Arrange them in their ascending order of load carrying capacity.

(i) Both ends are hinged

(ii) Both ends are fixed

(iii) One end is fixed and the other end is free

(iv) One end is fixed and the other end is hinged

Correct Answer: B. (iii), (i), (iv), (ii)
Solution:There are various possible combinations of restraints about either or both axes. The restraint conditions at the two ends of a column may be different or may be same. Following are the ideal cases of the end conditions:
  • Both ends of column hinged.
  • Both ends of column fixed.
  • One end of column fixed and the other end hinged.
  • One end of column fixed and the other end free.

The deflected shapes of columns under critical loads have been shown in Fig. below. A, B, C and D respectively. The actual lengths have been indicated by L' .

19. If a flow velocity field is given by V= 2x3i +6x2yj :

Correct Answer: C. flow is physically not possible
Solution:

20. Dip of a magnetic needle at equator and pole is respectively:

Correct Answer: B. 0° and 90°
Solution:Magnetic dip results from the tendency of a magnet to align itself with lines of magnetic field. The range of dip is from -90 degrees (at the North Magnetic Pole) to +90 degrees (at the South Magnetic Pole). Contour lines along which the dip measured at the Earth's surface is equal are referred to as isoclinic lines. The locus of the points having zero dip is called the magnetic equator or aclinic line.