Strength of Materials Questions and Answers – Power of Shaft

This set of Strength of Materials Multiple Choice Questions & Answers (MCQs) focuses on “Power of Shaft”.

1. Calculate the power transmitted in the shaft at 150 rpm. Take torque as 9000Nm.
a) 140 kW
b) 150 kW
c) 160 kW
d) 175 kW

Explanation: To find power transmitted (P) is P = 2 π N T / 60 watts.
P = 2 π × 150 × 9000 / 60
P = 140 kW.

2. Which of the following is not a cross drainage work?
a) Aqueduct
c) Super passage
d) Level crossing

Explanation: The head regulator is hydraulic structure constructed at the head of a canal system where it takes off from a reservoir behind a weir or a dam. It is used as a measuring device.

3. Stucco is a type of _________
a) Varnishing
b) Distempering
c) Plastering
d) Whitewashing

Explanation: Stucco is the name given to a decorative type of plaster, which provides an excellent finish like that with marble’s lining.

4. The thickness of cement plaster should not be more than _______
a) 15 mm
b) 12 mm
c) 16 mm
d) 20 mm

Explanation: The cement plaster is applied in one or two coats. The surface is polished with the trowel or iron float. The thickness of the coat should not be more than 12 mm.

5. __________ mm thick plastering is done for stone masonry.
a) 10 mm
b) 15 mm
c) 18 mm
d) 20 mm

Explanation: Normally 12 mm thick plastering is done for brick masonry and 20 mm thick plastering is done for the stone masonry. The plastered surface is then cured by sprinkling water over the surface for one or two weeks.
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6. The thickness of lime plaster varies from _______ to ________ mm.
a) 15 – 20 mm
b) 12 – 15 mm
c) 18 – 25 mm
d) 20 – 25 mm

Explanation: The proportioning of the ingredients of lime plaster is adapted according to a number of coats to be applied. The thickness of lime plaster varies from 20 to 25 mm.

7. Which of the following plastering is widely adopted in rural areas?
a) Stucco Plastering
b) Mud plastering
c) Lime plastering
d) Asphalt plastering

Explanation: Mud plastering is done on the walls of temporary Sheds and widely adopted in rural areas. The Plaster is evenly dashed against the wall with a wooden float. After 24 hours the surface is tapped.

8. Which of the following blasters contains pulverized alum?
a) Water proof plaster
b) Plaster on lathe
c) C plaster
d) Marble plaster

Explanation: Waterproof plaster is made by mixing 1 part of cement, 2 parts of sand and pulverized alum at the rate of 120 Newton per metre and in the water to be used.

9. Which of the following is known as” laying trowel”?
a) Float
b) Gauge trowel
c) Floating Rule
d) Skimming float

Explanation: The tool which is used to spread the mortar on the surface is known as float. It is also known as laying trowel. It is made of thin tempered Steel.

10. _________ is used to check the level of plastered surface.
a) Gauging trowel
b) Plumb bob
c) Floating Rule
d) Float

Explanation: Floating rule is the tool which is used to check the level of plastered surface between the successive screeds.

11. Skimming float is ____________
a) Wooden float
b) Metalled float
c) Tempered steel float
d) Asbestos cement sheet

Explanation: The wooden floor is known as the skimming float and it is used for final and finishing coat of plaster. The Plaster is evenly spread against the wall surface with a wooden float.

12. Which of the following is a defect in plastering?
a) Flaking
b) Scrap
c) Rust
d) Staining

Explanation: Flaking is a defect in plastering. It is a formation of a very loose mass of plastered surface due to poor bond between successive coats. This is obtained due to poor workmanship.

13. ________ is a process of mixing various constituents of plaster.
a) Grazing
b) Blistering
c) Gauging
d) Hacking

Explanation: Gauging is defined as a process of mixing various constituents of plaster. It is to be done after the brick work had carried out to the best workmanship. Efflorescence can be removed to some extent of dry brushing.

14. The small projections of plaster are known as ________
a) Back
c) Dot
d) Hack

Explanation: The small projections of plaster laid on the background are known as dots. These are laid for fixing of screeds. The size of the dots may be 15×15 cm.

15. ______ openings or indentations of corrugations in plaster.
a) Helms
b) Grains
c) Keys
d) Flake

Explanation: Keys are the openings or indentations of corrugations on the background or surface of undercoat, to which plaster will form mechanical bond.

Sanfoundry Global Education & Learning Series – Strength of Materials.

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