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

Total Questions: 50

1. A pipe of internal diameter 'd' and thickness of wall 't', carries fluid with intensity of pressure 'p'. Hoop stresses in the wall will be :

Correct Answer: C.
Solution:Hoop Stress: The presence of the tangential or hoop stress can be visualized by isolating a ring from the cylinder. The internal pressure pushes outward evenly all around the ring. Consider a cylinder (pipe) of inside radius r. outside radius R, and length L containing a fluid under pressure p. The circumferential or hoopwise load in the wall (t = thickness) is proportional to the pressure times radius = pr, and the hoop stress:

2. In India, yellow and white colour on a milestone indicates :

Correct Answer: C. national highway
Solution:National highways are always yellow and white colour, the highway number is written on the head of the milestone. The sum of the distances of two nearest cities in each direction from the milestone is listed on the side.
State highways are always in dark cyan and white colour, the number of kilometre is mentioned on the stone, followed by the name.
City or district highway milestones are always black and white in colour, the number of kilometre is mentioned along with the name.
Any roads constructed under any "Pradhan Mantri Gram Sadak Yojna" also known as roads constructed for villages and rural areas is always in red and black colour.

3. In the given truss, which of the following is a zero force member?

Correct Answer: D. EF
Solution:No explanation given in the book

4. To protect ferrous metal sheets from corrosion, they are dipped in a bath of molten zinc to add a protective layer of it on the sheet. This process is called as :

Correct Answer: D. Galvanizing
Solution:Galvanization or galvanizing is the process of applying a protective zinc coating to steel or iron, to prevent rusting. The most common method is hot-dip galvanizing, in which the parts are submerged in a bath of molten hot zinc.

5. A unit phase diagram is normally divided into three parts. What does the top, middle and bottom part represent?

Correct Answer: D. Air, water and solid respectively
Solution:No explanation given in the book

6. Blue Baby Disease in children is due presence of ______ in water.

Correct Answer: C. excess nitrates
Solution:The disease, popularly called blue baby disease, or technically as methaemoglobinemia, is caused in children by the presence of excess nitrates in water. Fortunately, however, when the child grows, say above 6 months or so, the chances of conversion of nitrate into nitrite gets meagre due to development of the child's intestinal tract, and hence such a disease does not normally occur afterwards.

7. A cross drainage work in which a canal is provided over the natural drainage is called :

Correct Answer: A. aqueduct
Solution:Aqueduct: In an aqueduct, the canal bed level is above the drainage bed level so canal is to be constructed above drainage. A canal trough is to be constructed in which canal water flows from upstream to downstream. This canal trough is to be rested on number of piers.

8. Which of the following is true about depth requirement of beam considering deflection control criteria for same span and loading?

Correct Answer: A. Depth required for Cantilever beam > Simply supported beam > Continuous beam
Solution:No explanation given in the book

9. What must be the minimum grade of concrete to be used for a reinforced concrete structural element which is exposed to extreme exposure conditions?

Correct Answer: C. M40
Solution:
ExposureMinimum Grade of Plain ConcreteMinimum Grade of Reinforced Concrete
Mild–M-20
Moderate15M-25
Severe20M-30
Very Severe20M-35
Extreme25M-40

10. A simply supported beam of span 'L' is carrying uniformly distributed load 'w' on the entire span. If uniformly distributed load is replaced by a concentrated load 'W' at centre such that it produces same deflection at centre. Keeping all other parameters same, ratio of 'W' to 'w' will be:

Correct Answer: B.