Home
E-Books
Jobs
News
Results
Competition Exams
Admissions
Generate Test
Make Quiz
mcqs of
,
1 : Two metal plates of area 2 and 3 square metres are placed in a liquid at the same depth. The ratio of pressures on the two plates is:
A
:
1:1
B
:
√2:3
C
:
2:3
D
:
4:9
2 : The principle of a hydraulic press is based on:
A
:
Hooke's law
B
:
Pascal's law
C
:
Principle of conservation of energy
D
:
Principle of conservation of momentum
3 : When a spring is compressed, what form of energy does it possess?
A
:
Kinetic
B
:
Potential
C
:
Internal
D
:
Heat
4 : A wire is stretched by a weight w. If the diameter of the wire is reduced to half of its previous value, the extension will become:
A
:
one half
B
:
double
C
:
one fourth
D
:
four times
5 : Four wires of the same material are stretched by the same load. Their dimensions are given below. Which of them will elongate most?
A
:
Length 1 m, diameter 1 mm
B
:
Length 2 m, diameter 2 mm
C
:
Length 3 m, diameter 3 mm
D
:
Length 4 m, diameter 0.5 mm
6 : The pressure at any point in a liquid is proportional to:
A
:
density of the liquid
B
:
depth of the point below the surface of the liquid
C
:
acceleration due to gravity
D
:
all of the above
7 : What is the force exerted by the atmosphere on a rectangular block surface of length 50 cm and breadth 40 cm? The atmospheric pressure is 100 kPa.
A
:
20 kN
B
:
100 kN
C
:
200 kN
D
:
500 kN
8 : Pressure applied to an enclosed fluid is:
A
:
increased and applied to every part of the fluid
B
:
diminished and transmitted to the walls of container
C
:
increased in proportional to the mass of fluid and then transmitted to each part of the fluid
D
:
transmitted unchanged to every portion of the fluid and walls of containing vessel
9 : What is a hook ‘s Law?
A
:
F=mv
B
:
F=kx
C
:
E=mc
D
:
P=IV
10 : Which of the following is a cause the deformation of solids?
A
:
Temperature
B
:
External
C
:
Change in density
D
:
All of above
11 : Which of the following has the highest density?
A
:
Water
B
:
Oil
C
:
Lead
D
:
Air
12 : What is the unit of spring constant K?
A
:
N/m
B
:
kg/m
C
:
m/N
D
:
Ns/m
13 : What is unit of density?
A
:
kg/m^3
B
:
g/cm^3
C
:
kg/L
D
:
All of above
14 : What is the density of water?
A
:
800kgm^-3
B
:
1000kgm^-3
C
:
2400kgm^-3
D
:
2000kgm^-3
15 : What is the density of Air?
A
:
1.8kgm^-3
B
:
3.6kgm^-3
C
:
2.7kgm^-3
D
:
1.3kgm^-3
16 : Which of the following devices uses Hooke‘s law to measure weight?
A
:
Balance
B
:
Spring scale
C
:
Thermometer
D
:
Barometer
17 : What is equivalent of 1 atm in millibar mercury?
A
:
10.13kPa
B
:
101.3kPa
C
:
1014kPa
D
:
1.013kPa
18 : In an open manometer what is compared to measure of gas?
A
:
Atmosphere pressure
B
:
Absolute zero
C
:
Gas flow rate
D
:
Gravitational force E)
E
:
Gas flow rate
19 : What type of fluid commonly used in manometer?
A
:
Water
B
:
Mercury
C
:
oil
D
:
All of above
20 : Why is the edge of chopper blade made very sharp?
A
:
To reduce pressure
B
:
To increase pressure
C
:
To change direction of forces
D
:
To reduce the force applied
21 : What is the formula for pressure?
A
:
P=F/A
B
:
P=FxA
C
:
P=F+A
D
:
P=F-A
22 : What is density?
A
:
Mass per unit volume
B
:
Volume per unit mass
C
:
Area per unit mass
D
:
Area perunitmass
23 : A 50 N force stretches a spring by 0.1m .What is the spring constant?
A
:
100N/m
B
:
500N/m
C
:
1000N/m
D
:
5000N/m
24 : What happen to pressure when when force is applied to small area?
A
:
Decrease
B
:
Increase
C
:
Become
D
:
Remain the same
25 : Which of the following devices works based on parcel’s law?
A
:
Hydraulic press
B
:
bicycle pump
C
:
Venture meter
D
:
them meter
26 : What unit of commonly used to measure atmospheric pressure?
A
:
Joule
B
:
Pascal
C
:
Watts
D
:
Kilograms
27 : What is typical operating pressure in a hydraulic brake system?
A
:
100Pa
B
:
1,00Pa
C
:
100KPa
D
:
100,000KPa
28 : Which of the following is an example of partial application of a hydraulic?
A
:
Lifting car for repair
B
:
Blowing air into tries
C
:
Pumping water
D
:
Electricity in dam
29 : Pressure in liquid Pressure is equal to :
A
:
Phg
B
:
Pgh
C
:
P/d
D
:
P/hq
30 : In a motor type the pressure is :
A
:
2x10^5 Pa
B
:
2x10”Pa
C
:
4x10^4vPa
D
:
7x10^2 Pa
31 : Which principle does a hydraulic breaks system perature on?
A
:
Bernoulli’s principle
B
:
Pascal law
C
:
Archimedes’ principle
D
:
Newton laws
32 : Atmospheric pressure at a location depends on?
A
:
Temperature
B
:
Altitude
C
:
Temperature
D
:
Humidity only
33 : Hooke’s law is used in which of the following applications?
A
:
Mechanical clocks
B
:
Electrical circuits
C
:
Hydraulic system
D
:
All of above
34 : What is a manometer used to measure?
A
:
Temperature
B
:
Pressure
C
:
Humidity
D
:
Velocity
35 : Which of the following is NOT an application of Hook’s Law?
A
:
Suspension system
B
:
Galvanometer
C
:
Microscope
D
:
Door hinges
36 : Which of the following component of hydraulic press?
A
:
Piston
B
:
Brake pads
C
:
Fuel tang
D
:
Spark plug
37 : What is formual for pressure according to Pascal’s law?
A
:
P=F/A
B
:
P=V/T
C
:
P=mg
D
:
P=A/F
38 : Which principle is used in the working of a manometer?
A
:
Newton ‘s
B
:
Emboli’s principle
C
:
Pascal ‘s law
D
:
Boyle’s law
39 : Which instrument is used to measure atmosphere pressure?
A
:
Thermometer
B
:
Barometer
C
:
Hydrometer
D
:
Ammeter
40 : What is the average atmosphere pressure at sea level?
A
:
1010 millibar
B
:
1013.25 millibar
C
:
100 millibar
D
:
900 millibar
41 : What is the equivalent of 1 atm in millibar mercury?
A
:
760 mm Hg
B
:
76 mm Hg
C
:
7.6 mm Hg
D
:
7600mmHg
42 : What is the pressure at the top Mount Everest as compared to sea level?
A
:
Higher than sea liver
B
:
Equal than sea level
C
:
Lower than sea level
D
:
It fluctuates constantly
43 : Which of the following best describes applications of Pascal‘s law?
A
:
Hydraulic press
B
:
Syringes
C
:
Air plane wing design
D
:
Hydraulic brake
44 : What is the primary function of hydraulic brakes?
A
:
To increase the vehicle speed
B
:
To reduce the vehicle fuel
C
:
To slow down or stop a vehicle
D
:
To maintain a constant speed
45 : Which of the following best describe the applications of Pascal‘s law?
A
:
gases
B
:
At applies only to only solids
C
:
It applies to both liquid and solids
D
:
It applies only in vacuum
46 : Which of the following component is NOT part of a hydraulic brake system?
A
:
Brake fluid
B
:
brake pads
C
:
piston
D
:
Spark plug
Chapter 6 : Mechanical Properties of Matter
Physics 9th MCQs || Ilam Ghar
Physics 9th
