Practice Measurement and si units - general science mcq Online Quiz (set-2) For All Competitive Exams
Q-1) The unit of power is
(a)
(b)
(c)
(d)
Q-2) A body is projected vertically upwards with a velocity of 96 ft/s. What is the total time for which the body will remain in the air?
(a)
(b)
(c)
(d)
Q-3) Which of the following systems of units is not based on units of mass, length and time alone?
(a)
(b)
(c)
(d)
1. CGS - centimetre-gram-seconds
The centimetre–gram–second system of units (abbreviated CGS or cgs) is a variant of the metric system based on the centimetre as the unit of length, the gram as the unit of mass, and the second as the unit of time.
2. SI - standard international system
S.I system (standard international system). In this system, the units of mass, length and time are the same, as that of the M.K.S system. However, it is an enlarged system encompassing all fundamental units.
3. MKS - metre-kilogramme-second
THE M.K.S. (metre-kilogramme-second) system of units is increasingly being. used by electrical engineers, particularly by those concerned with light-current and microwave work. The adoption of this system into the technical communications of physics and electrical engineering varies considerably.
4. FPS - foot-pound-second
The foot-pound-second (fps) system of units is a scheme for measuring dimensional and material quantities. The fundamental units are the foot for length, the pound for weight, and the second for time. The fps system has two variants, known as the American version and the Imperial version.
Q-4) How many watts are there in a horsepower?
(a)
(b)
(c)
(d)
746 watts
A power level of 1 hp is approximately equivalent to 746 watts (W) or 0.746 kilowatts (kW). To convert from horsepower to watts, multiply by 746.
To convert from watts to horsepower, multiply by 0.00134.
Q-5) What is the unit of atmospheric pressure?
(a)
(b)
(c)
(d)
Q-6) What is the correct sequence in which the lengths of the following units increase?- Angstrom
- Micron
- Nanometer
Select the correct answer using the code given below:
(a)
(b)
(c)
(d)
Q-7) ‘Joule’ is related to energy in the same way as ‘Pascal’ is related to
(a)
(b)
(c)
(d)
Q-8) The unit of the force is
(a)
(b)
(c)
(d)
The SI unit of force is the newton, symbol N.
Newton :
Newton, an absolute unit of force in the International System of Units (SI units), abbreviated N. It is defined as that force necessary to provide a mass of one kilogram with an acceleration of one metre per second per second.
Faraday :
A faraday is a dimensionless unit of electric charge quantity, equal to approximately 6.02 x 1023 electric charge carriers.
Fermi :
Fermi ('unit of measurement') is an SI unit of length equal to 10−15 metres, which means a quadrillionth of one metre. This distance is sometimes called a fermi and was so named in honour of Italian-American physicist Enrico Fermi, as it is a typical length-scale of nuclear physics.
Rutherford :
The rutherford (symbol Rd) is a non-SI unit of radioactive decay. It is defined as the activity of a quantity of radioactive material in which one million nuclei decay per second. It is therefore equivalent to one megabecquerel, and one becquerel equals one microrutherford.
Q-9) Pascal is a unit of measuring
(a)
(b)
(c)
(d)
Q-10) The smallest unit of length is
(a)
(b)
(c)
(d)
Q-11) Match List I (Units) with List II (Physical quantity) and select the correct answer using the codes given below the lists.
List I (Units)
List II (Physical quantity)
A. Watt
1. Electric charge
B. Tesla
2. Power
C. Coulomb
3. Luminous intensity
D. Candela
4. Magnetic field
Code: (A) (B) (C) (D)
| List I (Units) | List II (Physical quantity) |
| A. Watt | 1. Electric charge |
| B. Tesla | 2. Power |
| C. Coulomb | 3. Luminous intensity |
| D. Candela | 4. Magnetic field |
(a)
(b)
(c)
(d)
Q-12) Match List 'I' (Physical quantity) with list II (Dimension) and select the correct answer by using the codes given below the lists.
List I (Physical quantity)
List II (Dimension)
A. Density
1. [MLT–2]
B. Force
2. [ML–3]
C. Energy
3. [MLT–1]
D. Momentum
4. [ML2T–2]
Code: (A) (B) (C) (D)
| List I (Physical quantity) | List II (Dimension) |
| A. Density | 1. [MLT–2] |
| B. Force | 2. [ML–3] |
| C. Energy | 3. [MLT–1] |
| D. Momentum | 4. [ML2T–2] |
(a)
(b)
(c)
(d)
Q-13) One micron is equal to
(a)
(b)
(c)
(d)
Q-14) Match List I (Physical quantity) with list II (Units) and select the correct answer by using the codes given below the lists.
List I (Physical quantity)
List II (Units)
A. Solid angle
1. pascal
B. Impulse
2. steradian
C. Viscosity
3. Newton-second
D. Pressure
4. Pascal-second
Code: (A) (B) (C) (D)
| List I (Physical quantity) | List II (Units) |
| A. Solid angle | 1. pascal |
| B. Impulse | 2. steradian |
| C. Viscosity | 3. Newton-second |
| D. Pressure | 4. Pascal-second |
(a)
(b)
(c)
(d)
Q-15) 1 Kg/$cm^2$ pressure is equivalent to
(a)
(b)
(c)
(d)
Kilogram or Kilogram Force per Square Centimeter (kg/cm2 or kgf/cm2) is a pressure unit that has been largely superseded by the SI unit system of pascal units.
It is the metric equivalent of pounds per square inch (psi). 1 kg/cm2 equals 98,066.5 pascals.
Q-16) One pikogram is equal to
(a)
(b)
(c)
(d)
Q-17) How can the height of a person who is six feet tall, be expressed (approximately) in nanometre?
(a)
(b)
(c)
(d)
Q-18) S.I. unit of surface tension is
(a)
(b)
(c)
(d)
Q-19) PARSEC is the unit of
(a)
(b)
(c)
(d)
Q-20) A parsec, a unit of distance used to measure the distance related to the stars in the sky, is equal to
(a)
(b)
(c)
(d)