Measuring Devices and Scales

Measuring Devices and Scales

Total Questions: 52

11. Pyrometer is used to measure -

Chhattisgarh P.C.S. (PRE) 2011 , U.P.P.C.S.(MAINS) 2008 , Uttarakhand P.C.S.(PRE) 2006, U.P.P.C.S.(SPL.)MAINS) 2004,U.P.P.C.S.(PRE) 1998

(a) Humidity
(b) Air pressure
(c) Density
(d) High temperature

Correct Answer: (c) Density

Solution:A pyrometer is type of remote-sensing radiation thermometer which is used to measure the high temperature. It is based on Stefan-Boltzmann law which describe that the total radiation emitted by the black body is proportional to the fourth power of its temperature (E∝T⁴). It is used to measure the temperature of distant object such as sun.

12. Which on of the following devices is used to measure the extremely high temperature ? [U.P.P.C.S. (MAINS) 2016]

(a) Pyrometer
(b) photometer
(c) pycnometer
(d) phonometer

Correct Answer: (a) Pyrometer

Solution:A pyrometer is type of remote-sensing radiation thermometer which is used to measure the high temperature.It is based on Stefan-Boltzmann law which describe that the total radiation emitted by the black body is proportional to the fourth power of its temperature (E∝T⁴). It is used to measure the temperature of distant object such as sun.

13. Which one of the following thermometer is known as pyrometer ? [U.P.P.C.S. (pre) 2016]

(a) thermo- electric termometer
(b) Radiation thermometer
(c) gas thermometer
(d) liquid thermometer

Correct Answer: (b) Radiation thermometer

Solution:

A pyrometer is type of remote-sensing radiation thermometer which is used to measure the high temperature. It is based on Stefan-Boltzmann law which describe that the total radiation emitted by the black body is proportional to the fourth power of its temperature (E∝T⁴). It is used to measure the temperature of distant object such as sun.

14. The thermometer which is used to measure the 2000°C temperature is - [U.P.P.C.S. (pre) 2009]

(a) Mercury thermometer
(b) Steam pressure thermometer
(c) Total radiation pyrometer
(d) Gas thermometer

Correct Answer: (c) Total radiation pyrometer

Solution:A pyrometer is type of remote-sensing radiation thermometer which is used to measure the high temperature.It is used especially for the measurement of moving objects or any surface that cannot be reached or cannot be touched. The temperature is measured by measuring the thermal radiation.

15. Which one of the following can be used to measure temperature above 1500°C [U.P. Lower sub (pre) 2013, U.P.U.D/L.D.A.(SPL) 2010]

(a) clinical thermometer
(b) Thermoelectric couple thermometer
(c) Platinum resistance thermometer
(d) Pyrometer

Correct Answer: (d) Pyrometer

Solution:Pyrometer is used to measure temperature above 1500°C.

16. 'Pyrheliometer' is used to measuring : [U.P.P.C.S.(PRE) ( RE.EXAM)2015]

(a) Sun spots
(b) Solar radiation
(c) Air temperature
(d) Temperature of plants

Correct Answer: (b) Solar radiation

Solution:Mainly there are two types of devices which is used to measure solar radiation these are : 'Pyrheliometer' and pyranometer. Pyrheliometer it measures the direct beam solar irradiance, which is the amount of sunlight coming directly from the sun onto a surface perpendicular to the rays.

17. What is measured by manometer? [U.P.P.C.S.(PRE) 1990]

(a) Air pressure
(b) Pressure of gas
(c) Density of liquids
(d) Pressure of oil on the surface

Correct Answer: (b) Pressure of gas

Solution:Manometer is an instrument that uses a column of a liquid to measure pressure of liquids or gases commonly referred as pressure measuring instrument.

18. 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) 2001]

List-1 (Instrument)	List-2 (Measuring quantity)
a) Ammeter	pressure
b) Hygrometer	weight
c) Spring balance	electric current
d) Barometer	relative humidity

code :

A	B	C	D
2	3	4	1
3	4	2	1
4	1	2	3
1	2	3	4

Correct Answer: (b)

Solution:An ammeter is used to measure the electric current in a circuit.

A hygrometer is used to measure the moisture content.

A spring balance is a weighing apparatus that measure weighs by the tension of a spring.

A barometer is used to measure atmospheric pressure.

19. Which one of the following pair is not correctly matched ? [U.P. Lower Sub (pre) 2015]

(a) Ondometer : Measuring instrument for frequency of electromagnetic waves.
(b) Audiometer : Device for measuring sound intensity.
(c) Odometer : Measuring instrument for distance covered by motor wheels.
(d) Ammeter : Measuring instrument for electric power.

Correct Answer: (d) Ammeter : Measuring instrument for electric power.

Solution:An ammeter is used to measure the electric current in a circuit not for measuring electric power.Thus, option (d) is not correctly matched.

20. Which instrument is used to measure atmospheric pressure? [U.P.P.S.C. (GIC) 2010 , M.P.P.C.S.( PRE) 2000]

(a) Hygrometer
(b) Barometer
(c) Manometer
(d) Hydrometer

Correct Answer: (b) Barometer

Solution:A barometer is a scientific instrument used in meteorology to measure atmospheric pressure. A sudden fall of mercury in a barometer indicates the thunderstorms.

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