Friction-Increasing and Reducing Friction [CBSE (Central Board of Secondary Education) Class-8 Science]: Questions 1 - 8 of 8
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Question 1
Question MCQ▾
Fluid friction is also called as:
Choices
Choice (4) | Response | |
---|---|---|
a. | Viscous drag | |
b. | Drag | |
c. | Both a. and b. are correct | |
d. | None of the above |
Question 2
Question MCQ▾
The friction which comes into play when a body slides over another body is:
Choices
Choice (4) | Response | |
---|---|---|
a. | Rolling Friction | |
b. | Sliding friction | |
c. | Treading | |
d. | Drag |
Question 3
Question MCQ▾
Ball bearings are type of:
Choices
Choice (4) | Response | |
---|---|---|
a. | Axle | |
b. | Treading | |
c. | Rollers | |
d. | Wheels |
Question 4
Question MCQ▾
Gases and liquids are called:
Choices
Choice (4) | Response | |
---|---|---|
a. | Fluids | |
b. | Viscous drag | |
c. | Drag | |
d. | All of the above |
Question 5
Question MCQ▾
Rolling friction:
Choices
Choice (4) | Response | |
---|---|---|
a. | Increases the friction | |
b. | Has no effect | |
c. | Reduces the friction | |
d. | Lesser than sliding friction |
Question 6
Question MCQ▾
Lubrication is a process of:
Choices
Choice (4) | Response | |
---|---|---|
a. | Fluid friction | |
b. | Converting dry friction into wet friction | |
c. | Use of lubricants for reducing friction | |
d. | Both b. and c. are correct |
Question 7
Question MCQ▾
To overcome drag objects moving through fluid are given special shapes is called as
Choices
Choice (4) | Response | |
---|---|---|
a. | Streamlining of the object | |
b. | Treading | |
c. | Lubrication | |
d. | Ball bearing |
Question 8
Question MCQ▾
Trading of tyre is done:
Choices
Choice (4) | Response | |
---|---|---|
a. | To Increase the friction | |
b. | To Decrease the friction | |
c. | Has no effect on friction | |
d. | None of the above |