Worksheet Solutions: Mechanical Projects - 4 | DIY Science Fun: Cool School Projects - Class 6 PDF Download

Fill in the Blanks

Q1: Cable cars are often used in __________ regions where building roads is challenging.
Ans: hilly

Q2: When powered by electricity, cable cars are referred to as __________ __________.
Ans: electric cable ways

Q3: Gear motors used in cable cars have a significantly lower __________ (RPM) compared to regular motors.
Ans: RPM

Q4: Cable cars are considered cost-effective because they are cheaper to build than traditional __________.
Ans: roads

Q5: Cable cars help in the preservation of wildlife and vegetation by reducing the need for physical passage through sensitive lands, thus contributing to __________ __________.
Ans: environmental conservation

Q6: Cable cars provide a straight-line, high-altitude transportation option, which minimizes __________ consumption.
Ans: fuel

Q7: One limitation of cable cars is that they are primarily suitable for __________ and hilly regions.
Ans: mountainous

Q8: Cable cars operate at __________ speeds compared to other modes of transportation.
Ans: slower

Q9: When creating a cable car model, attaching a __________ __________ to the gear motor is necessary.
Ans: metal wire

Q10: Cable cars can be an excellent choice for __________-grade science fair ideas due to their unique nature.
Ans: 10th-grade science fair ideas

Multiple Choice Questions (MCQ)

Q1: What type of motor is commonly used in cable cars?
(a) Regular motors
(b) Gear motors
(c) Hydraulic motors
(d) Solar motors
Ans: (b)
Gear motors are commonly used in cable cars due to their lower RPM, which makes them suitable for slower-moving applications.

Q2: Why are cable cars considered environmentally friendly?
(a) They use diesel fuel.
(b) They contribute to air pollution.
(c) They primarily utilize electric energy.
(d) They are not energy-efficient.
Ans: (c)
Cable cars are considered environmentally friendly because they predominantly use electric energy, reducing air pollution.

Q3: In which type of terrain are cable cars less practical?
(a) Flat
(b) Mountainous
(c) Hilly
(d) Coastal
Ans: (a)
Cable cars are primarily suitable for mountainous and hilly terrains where road construction is challenging.

Q4: What role does metal wire play in a cable car model?
(a) It provides structural support.
(b) It generates electricity.
(c) It serves as a communication line.
(d) It controls the speed of the cable car.
Ans: (a)
It provides structural support. (Metal wire in a cable car model helps provide structural support and stability.

Q5: What is the main advantage of cable cars over road construction in mountainous areas?
(a) Cable cars are faster.
(b) Cable cars are cheaper.
(c) Cable cars can carry more passengers.
(d) Cable cars are more scenic.
Ans: (a)
Metal wire in a cable car model helps provide structural support and stability.

True or False

Q1: True/False: Cable cars are primarily used in flat terrains.
Ans: False
Cable cars are primarily used in mountainous and hilly terrains, not flat terrains.

Q2: True/False: Cable cars operate at higher speeds compared to other modes of transportation.
Ans: False
Cable cars operate at slower speeds compared to other modes of transportation.

Q3: True/False: Cable cars contribute to environmental conservation by using petroleum-based fuels.
Ans: False
Cable cars primarily utilize electric energy, not petroleum-based fuels.

Q4: True/False: Gear motors in cable cars have a lower RPM than regular motors.
Ans: True
Gear motors in cable cars have a lower RPM than regular motors to operate at slower speeds.

Q5: True/False: Creating a cable car model can be an excellent science fair project for 10th-grade students.
Ans: True
Creating a cable car model can be an excellent science fair project for 10th-grade students due to its unique and educational nature.

Short Answer Questions

Q1: Explain one advantage and one limitation of using cable cars in transportation.
Ans: Advantage: Cable cars are cost-effective in hilly regions due to lower construction costs. Limitation: They are less practical in flat terrains.

Q2: What role does a gear motor play in a cable car model?
Ans: A gear motor is responsible for rotating the cable way in a cable car model, controlling its movement.

Q3: How do cable cars contribute to environmental conservation?
Ans: Cable cars contribute to environmental conservation by reducing the need for physical passage through sensitive lands, minimizing disruption to wildlife and vegetation. They also use electric energy, reducing air pollution.

Q4: Why are cable cars a cost-effective transportation option in hilly regions?
Ans: Cable cars are cost-effective in hilly regions because they require less infrastructure construction compared to building roads. They can span rugged terrain more easily.

Q5: What safety precautions should be taken when working on a cable car science project?
Ans: Safety precautions should include wearing safety glasses, handling knives and scissors with care, and working under the supervision of adults to prevent accidents during the project.