MEASUREMENT/UNIT

21. Megawatt is the measuring unit of power which is - [U.P.Lower Sub.(pre)1998]

(a) Generated
(b) Consumed
(c) Saved
(d) Lost in transmission

Correct Answer: (a) Generated

Solution:

Megawatt is the measuring unit of power, which is generated in power station or power plant.1 Megawatt is equal to 10∧6 (1 million) watt.

22. Match List-1 with List-2 and select the correct answer from the code given below : [U.P.P.S.C. (PRE)2005, U.P.U.D.A./L.D.A(PRE)2001]

List-1	List-2
Acceleration	Joule
Force	Newton per second
Work done	Newton
Impulse	Metre/seconds

-	A	B	C	D
a)	1	2	3	4
b)	3	4	1	2
c)	2	3	4	1
d)	4	3	1	2

a)
b)
c)
(d)

Correct Answer: (d)

Solution:

Acceleration is the rate of velocity of an object,with respect to time.The SI unit of acceleration is metre per second square (m/s∧2). Unit of force is Newton (N).Unit of impulse is newton metre (Ns).Unit of work is joule.

23. Which of one of the following SI unit is not correctly matched? [U.P.Lower Sub.(pre)2013]

(a) Work-Joule
(b) Mass-kg
(c) Force-newton
(d) Pressure-Dyne

Correct Answer: (d) Pressure-Dyne

Solution:

Pascal is the unit of of pressure or stress in the international system of the units(SI).Dyne is the unit of force in CGS System.Clearly,option (d) is not matched correctly.

24. Match List-1 with List-2 and select the correct answer using the codes given below : [U.P.U.D.A./L.D.A. (PRE)2002]

List-1(Units)	List-2(Parametric quantities)
Watt	Heat
Knot	Navigation
Nautical mile	Speed of ship
Calorie	Power

-	A	B	C	D
a)	3	1	4	2
b)	1	2	3	4
c)	4	3	2	1
d)	2	4	1	3

a)
(c)
d)
b)

Correct Answer: (c)

Solution:

The unit of power is watt,which is equal to one joule per second.Knot is the unit of measuring of speed of a ship.Nautical mile is unit of distance used by navigators in the sea.Calorie is unit of heat and energy.Thus option (c) correctly matched.

25. Match the following : [U.P.P.C.S.(PRE)1990]

List-1	List-2
joule	current
Ampere	power
Watt	work
Volt	electric potential

-	A	B	C	D
a)	3	1	2	4
b)	1	2	3	4
c)	4	3	2	1
d)	1	3	2	4

a)
b)
c)
d)

Correct Answer: a)

Solution:

Joule is the unit work.Ampere,watt and volt are the units of current ,power and electric potential respectively.

26. How many horse power are there in a horsepower? [M.P.P.SC.S]

(a) 1000
(b) 750
(c) 746
(c) 748

Correct Answer: (c) 746

Solution:

Horsepower is the unit of measurement of power( the rate at which work is done)
1 watt=1 joule
1 Horse power =746 watt

27. Which one is the following is not correctly matched [U.P.P.S.C.(Mains)2010]

(a) Angstrom - unit of wavelength of light
(b) Nautical mile - unit of distance used in navigation
(c) Knot - measure of speed of ship
(d) Light year - unit of measurement of time

Correct Answer: (d) Light year - unit of measurement of time

Solution:

Light year is not a unit of measurement of time, but a unit of measuring the distance.The remaining pairs are correctly matched.

28. Angstrom is a unit of [64th B.P.C.S. (PRE)2018]

(a) wavelength
(b) frequency
(c) energy
(d) velocity

Correct Answer: (a) wavelength

Solution:

Angstrom is the unit of length used in mainly in measuring the wavelength of electromagnetic wave which is equal to 10∧-10 metre or 0.1 nanometre.

29. Match List-1 with List-2 and select the correct answer using the following code given below in the lists: [U.P.P.S.C (PRE)2006, I.A.S.(PRE)1999]

List-1	List-2
High speed	mach
wavelength	angstrom
pressure	pascal
energy	joule

-	A	B	C	D
a)	2	1	3	4
b)	1	2	4	3
c)	1	2	3	4
d)	2	1	4	3

b)
d)
(c)
a)

Correct Answer: (c)

Solution:

In the fluid mechanics , the mach number is a dimensionless quantity representing the ration of the speed of a body to the speed of sound in the surrounding medium.Supersonic travel is a rate of an object that exceeds the speed of sound (Mach) so mach is used to represent the high speed.Wavelength is measured in angstrom while pressure is measured in pascal and energy in joule.

30. Joule is related to energy in the same way as pascal as related to : [Chhattisgarh P.C.S.(PRE)2015]

(a) Mass
(b) Pressure
(c) Density
(d) Purity

Correct Answer: (b) Pressure

Solution:

In the fluid mechanics , the mach number is a dimensionless quantity representing the ration of the speed of a body to the speed of sound in the surrounding medium.Supersonic travel is a rate of an object that exceeds the speed of sound (Mach) so mach is used to represent the high speed.Wavelength is measured in angstrom while pressure is measured in pascal and energy in joule.

MEASUREMENT/UNIT

21. Megawatt is the measuring unit of power which is - [U.P.Lower Sub.(pre)1998]

22. Match List-1 with List-2 and select the correct answer from the code given below : [U.P.P.S.C. (PRE)2005, U.P.U.D.A./L.D.A(PRE)2001]

23. Which of one of the following SI unit is not correctly matched? [U.P.Lower Sub.(pre)2013]

24. Match List-1 with List-2 and select the correct answer using the codes given below : [U.P.U.D.A./L.D.A. (PRE)2002]

25. Match the following : [U.P.P.C.S.(PRE)1990]

26. How many horse power are there in a horsepower? [M.P.P.SC.S]

27. Which one is the following is not correctly matched [U.P.P.S.C.(Mains)2010]

28. Angstrom is a unit of [64th B.P.C.S. (PRE)2018]

29. Match List-1 with List-2 and select the correct answer using the following code given below in the lists: [U.P.P.S.C (PRE)2006, I.A.S.(PRE)1999]

30. Joule is related to energy in the same way as pascal as related to : [Chhattisgarh P.C.S.(PRE)2015]

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