Process Control and Instrumentation

271. Which of the following cannot measure a temperature of 1600°C?

1. Platinum resistance thermometer
2. Thermocouple
3. Photo-electric pyrometer
4. Radiation pyrometer

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272. Which of the following controllers has maximum offset?

1. P-controller
2. P-I controller
3. P-D controller
4. P-I-D controller

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273. Which of the following controllers has the least maximum deviation?

1. P-controller
2. P-I controller
3. P-I-D controller
4. P-D controller

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274. Which of the following does not figure in the list of seven substances selected for international temperature scale?

1. Ice (F.P) and steam (B.P)
2. Oxygen and sulphur (B.P)
3. Antimony and silver (F.P)
4. Zinc (B.P) and mercury (F.P)

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275. Which of the following filled system expansion thermometer has the capability to measure the lowest temperature?

1. Mercury in glass thermometer
2. Mercury in steel thermometer
3. Alcohol in glass thermometer
4. Fused metal (Na or K) in steel thermometer

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276. Which of the following filled system expansion thermometers has the lowest positive temperature measurement capability?

1. Mercury in glass thermometer
2. Alcohol in glass thermometer
3. Fused metal (Na or K) in steel thermometer
4. Nitrogen in steel thermometer

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277. Which of the following flow-metering instruments is an areameter?

1. Venturimeter
2. Rotameter
3. Pitot tube
4. Hot wire anemometer

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278. Which of the following fluid flow measuring devices can measure the largest flow rate?

1. V-notch
2. Rotameter
3. Orificemeter
4. Weir

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279. Which of the following instruments is not used for measuring sub-zero (<0°) temperatures?

1. Platinum resistance thermometer
2. Mercury in glass thermometer
3. Vapor pressure thermometer
4. Radiation pyrometer

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280. Which of the following is a 'contact' pyrometer?

1. Resistance pyrometer
2. Optical pyrometer
3. Radiation pyrometer
4. Infra red pyrometer

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