# Inertia Polar Moment MCQ Questions & Answers

Inertia Polar Moment MCQs : This section focuses on the "Inertia Polar Moment". These Multiple Choice Questions (MCQs) should be practiced to improve the Inertia Polar Moment skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.

Question 1

What is the polar modulus for solid shaft?

A. ?/16 D2
B. ?/12 D3
C. ?/ 16 D3
D. ?/16 D

Question 2

_______ provides straight approach to the scouring sluices.

B. Silt Excluder
C. Divide wall
D. Guide banks

Question 3

Which of the following is known as “under sluices”?

A. Scouring Sluices
B. Divide wall

Question 4

__________ is provided to prevent the river from outflanking the work.

A. Guide banks
B. Marginal bunds
C. Silt excluder
D. Divide wall

Question 5

A hollow shaft outside diameter 120 mm and thickness 20 mm. Find polar moment of inertia.

A. 16.36 × 106 mm4
B. 18.45 × 106 mm4
C. 21.3 × 106 mm4
D. 22.5 × 106 mm4

Question 6

Curtain walls are provided to increase ________

A. Creep depth
B. Creep area
C. Creep length
D. Creep volume

Question 7

__________ is used as measuring device.

B. Divide wall
C. Cross regulator
D. Scouring sluices

Question 8

_________ is provided to reduce the kinetic energy of falling water in weir.

A. Body wall
B. Curtain walls
C. Downstream apron
D. Shutter

Question 9

The moment of inertia of a plane area with respect to an axis ____________ to the plane is called a polar moment of inertia.

A. Parallel
B. Perpendicular
C. Equal
D. Opposite

Question 10

__________ is provided for the easy movement of fish from upstream to downstream.

B. Silt excluder
C. Marginal bunds
D. Marginal embankments

Question 11

____________ are provided to protect the land and property with is likely to be submerged.

A. Weir
B. Divide wall
C. Marginal bunds

Question 12

What is the polar modulus for solid shaft?

A. π/16 D2
B. π/12 D3
C. π/ 16 D3
D. π/16 D

Question 13

What are the units of Polar modulus?

A. mm3
B. mm2
C. mm
D. mm4

Question 14

Which of the following are also known as upstream and downstream piles?

A. Talus on upstream and downstream
B. Curtain walls on upstream and downstream
C. Solid apron on upstream and downstream
D. Shutters on crest of weir

Question 15

Which of the following is known as under sluices ?

A. Scouring Sluices
B. Divide wall

Question 16

A hollow shaft outside diameter 120 mm and thickness 20 mm. Find polar moment of inertia.

A. 16.36 Ã 106 mm4
B. 18.45 Ã 106 mm4
C. 21.3 Ã 106 mm4
D. 22.5 Ã 106 mm4