Measuring Devices and Scales

1. Which one of the following instrument is used for locating submerged in an ocean ? [U.P.R.O/A.R.O.(PRE) (RE.EXAM) 2016,U.P.P.S.C. (PRE) 2000]

(a) Audiometre
(b) Galvanometer
(c) Sextant
(d) SONAR

Correct Answer: (d) SONAR

Solution:SONAR [ Sound Navigation and Ranging ] is used for locating submerged objects in an ocean. It is based on a very simple principle i.e pulse of ultrasonic waves is sent into the water, it strikes the target and bounced back towards the source.It helps to detect or locate the submerged and icebergs.

2. SONAR is mostly used in [Chhattisgarh P.C.S. (PRE) 2011]

(a) Astronauts
(b) Doctors
(c) Engineers
(d) Navigatore

Correct Answer: (d) Navigatore

Solution:SONAR [ Sound Navigation and Ranging ] is used for locating submerged objects in an ocean. It is based on a very simple principle i.e pulse of ultrasonic waves is sent into the water, it strikes the target and bounced back towards the source.It helps to detect or locate the submerged and icebergs.

3. In SONAR, we use - [U.P.P.C.S. (MAINS) 2013]

(a) Radio waves
(b) Audible waves
(c) Ultrasonic waves
(d) Infrasonic waves

Correct Answer: (c) Ultrasonic waves

Solution:SONAR [ Sound Navigation and Ranging ] is used for locating submerged objects in an ocean. It is based on a very simple principle i.e pulse of ultrasonic waves is sent into the water, it strikes the target and bounced back towards the source.It helps to detect or locate the submerged and icebergs.

4. The apparatus is used to measure the intensity of sound is : [M.P.P.C.S. (Pre)1990]

(a) Anemometer
(b) Audiophone
(c) Chronometer
(d) Audiometer

Correct Answer: (d) Audiometer

Solution:An audiometer is used to measure the intensity of sound ,while the audiophone is a type of small hearing aid. Anemometer is used to measure the wind speed and wind pressure. Chronometer is a timepiece or timing device .

5. Which of the following is measured by 'Anemometer' ? [M.P.P.C.S.(PRE) 2012]

(a) Velocity of water flow
(b) Intensity of the light
(c) Force of the wind
(d) Depth of the water

Correct Answer: (c) Force of the wind

Solution:An audiometer is used to measure the intensity of sound ,while the audiophone is a type of small hearing aid. Anemometer is used to measure the wind speed and wind pressure. Chronometer is a timepiece or timing device .

6. The velocity of wind is measured by : [U.P.P.C.S.(PRE) 2016]

(a) Wind lane
(b) Anemometer
(c) Hydrometer
(d) Barometer

Correct Answer: (b) Anemometer

Solution:An audiometer is used to measure the intensity of sound ,while the audiophone is a type of small hearing aid. Anemometer is used to measure the wind speed and wind pressure. Chronometer is a timepiece or timing device .

7. Wind velocity is measured by : [M.P.P.C.S. (PRE) 2022]

(a) Barometer
(b) Hygrometer
(c) Maximum-minimum Thermometer
(d) Anemometer

Correct Answer: (d) Anemometer

Solution:An audiometer is used to measure the intensity of sound ,while the audiophone is a type of small hearing aid. Anemometer is used to measure the wind speed and wind pressure. Chronometer is a timepiece or timing device .

8. Which one of the following is not correctly matched - [U.P.P.C.S. (PRE) 1997]

List-1	List-2
Anemometer	wind speed
Ammeter	electric current
Tachometer	pressure difference
Pyrometer	high temperature

b)
a)
(c)
d)

Correct Answer: (c)

Solution:Tachometer is a type of theodolite used for rapid measurement and determine electronically or electro-optically, the distance to target and is highly automated in its operation. The remaining pairs are correctly matched. Pyrometer is used to measuring the relativity high temperature i.e furnaces.Anemometer is used to measure the speed the of wind. An Ammeter is a measuring instrument used to measure electric current in circuit.

9. The device to measure electric current - [65th B.P.S.C.(Pre) (Re.exam) 2019, 64th B.P.S.C.(Pre) (Re.exam) 2019]

(a) Voltmeter
(b) Ammeter
(c) Voltameter
(d) Potentiometer

Correct Answer: (b) Ammeter

Solution:Tachometer is a type of theodolite used for rapid measurement and determine electronically or electro-optically, the distance to target and is highly automated in its operation. The remaining pairs are correctly matched. Pyrometer is used to measuring the relativity high temperature i.e furnaces.Anemometer is used to measure the speed the of wind. An Ammeter is a measuring instrument used to measure electric current in circuit.

10. Which one of the following is not correctly matched - [67th B.P.S.C.(PRE) 2022]

List-1	List-2
a) voltmeter	potential difference
b) ammeter	electric current
c) potentiometer	electromotive force
d) galvanometer	electric resistance

a)
c)
b)
(d)

Correct Answer: (d)

Solution:Galvanometer is an instrument used to measure the small electric current or a function of the current by deflection of a moving coil.The deflection is a mechanical rotation derived from forces resulting from the current .Hence, the option (d) is not correctly matched. Rest are correctly matched.

Measuring Devices and Scales

1. Which one of the following instrument is used for locating submerged in an ocean ? [U.P.R.O/A.R.O.(PRE) (RE.EXAM) 2016,U.P.P.S.C. (PRE) 2000]

2. SONAR is mostly used in [Chhattisgarh P.C.S. (PRE) 2011]

3. In SONAR, we use - [U.P.P.C.S. (MAINS) 2013]

4. The apparatus is used to measure the intensity of sound is : [M.P.P.C.S. (Pre)1990]

5. Which of the following is measured by 'Anemometer' ? [M.P.P.C.S.(PRE) 2012]

6. The velocity of wind is measured by : [U.P.P.C.S.(PRE) 2016]

7. Wind velocity is measured by : [M.P.P.C.S. (PRE) 2022]

8. Which one of the following is not correctly matched - [U.P.P.C.S. (PRE) 1997]

9. The device to measure electric current - [65th B.P.S.C.(Pre) (Re.exam) 2019, 64th B.P.S.C.(Pre) (Re.exam) 2019]

10. Which one of the following is not correctly matched - [67th B.P.S.C.(PRE) 2022]

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