NHPC-JE'21 CE: Daily Practices Quiz. 16-Dec-2021

Know your strengths and practice your concepts with this quiz on NHPC JE Recruitment 2021. This quiz for NHPC JE Recruitment 2021 is designed specially according to NHPC Syllabus 2021.

Quiz: Civil Engineering
Exam: NHPC-JE
Topic: Miscellaneous

Each question carries 1 mark
Negative marking: 1/4 mark
Time: 8 Minutes

Q1. In case of a direct vernier scale
(a) graduations increase in opposite direction in which graduations of the main scale increase
(b) smallest division is longer than smallest division of the main scale
(c) graduations increase in the same direction in which graduations of the main scale increase
(d) None of these

Q2. What is the presence of original rounded surface on the manufactured piece of timber called?
(a) Chipmark
(b) Torn grain
(c) Wane
(d) Diagonal grain

Q3. Aerobic attached growth process is classified under:
(a) activated sludge process
(b) chemical clarification
(c) biological treatment
(d) preliminary treatment

Q4. The relationship, between number of joints (j), and the number of members (m), in a perfect truss, is given by
(a) m = 3j – 2
(b) m = 2j – 3
(c) m = j – 2
(d) m = 2j – 1

Q5. The term ‘Characteristic load’ means that load which has a probability of not being exceeded, during the life of the structure is equal to:
(a) 90%
(b) 95%
(c) 99%
(d) 100%

Q6. If angle of internal friction of soil is 30°, coefficient of active earth pressure will be:
(a) 1/2
(b) 1/3
(c) 1/4
(d) 2/3

Solutions

S1. Ans.(c)
Sol. Direct vernier – division which are slightly shorter than main scale. Reading increases in the direction of the main scale.
→ n division of vernier is equal to (n-1) division of main scale.
Retrograde vernier – Division which are slightly longer than main scale. Reading increases in a direction opposite to main scale. n division of vernier (n+1) division of main scale.

S2. Ans.(c)
Sol. Wane → Presence of original rounded surface on the manufactured piece of timber called wane.
Torn grain→ it is the depression induced in timber due to falling of tools over timber.
Chip mark → This is the detect in timber indicated by mark or sign placed on finished surface of timber.

S3. Ans.(c)
Sol. Aerobic attached growth process is a biological treatment in which biomass is attached over the medium and waste water passed through it.

S4. Ans.(b)
Sol. The relationship, between number of joints (j), and the number of members (m), in a perfect truss, is given by –
m = 2j-3
Where m = No. of truss member
J =No. of joint in the truss.

S5. Ans.(b)
Sol. Characteristic load means that load which has 95% probability of not being Exceeded during entire life of structure.

S6. Ans.(b)
Sol. Angle of internal frictions (ϕ) =30 coefficient of Active earth pressure (K_a)=
1-sinϕ
=(1-sinϕ)/(1+sinϕ)
=(1-sin30)/(1+sin30)
=1/3