High temperature of around 2000°C of incandescent gas mantles is measured by a/an __________________?

Related Mcqs:

1. Smoke density of the flue gas going out of the chimney is measured by a __________________?

   A. Polarograph
   B. Thermal conductivity meter
   C. Photo electric cell
   D. Chromatograph

2. Sub-zero temperature (< 0°C) can be measured by a constant volume gas thermometer employing ?

   A. Helium
   B. Nitrogen
   C. Hydrogen
   D. None of these

3. Which of the following temperature measuring instruments need not touch the object whose temperature is being measured ?

   A. Radiation/infrared pyrometer
   B. Filled system thermometer
   C. Mercury in glass thermometer
   D. Thermo electric pyrometer

4. Resistance of a gas in a vessel is given by (where, P = pressure, V = volume of the vessel, n = no. of moles of the gas, R = gas constant) ?

   A. V/nRT
   B. nRT/V
   C. nRT/P
   D. P/nRT

5. Vapour actuated pressure spring thermometer does not require ambient temperature compensation. Ambient temperature compensation is provided in gas or liquid expansion pressure spring thermometer by__________________?

   A. Making the volume of thermometer bulb as large as conveniently possible
   B. Reducing the volume of the capillary to a minimum
   C. Reducing the volume of the receiving element to a minimum
   D. All A , B & C.

6. Water is entering a storage tank at a temperature T0 and flow rate Q0 and leaving at a flow rate Q and temperature T. There are negligible heat losses in the tank. The area of cross-section of the tank is A0. The model that describes the dynamic variation of temperature of water in the tank with time is given as________________?

   A. Q0(T0 – T) = Ac . h (dT/dt)
   B. Q0T0 – QT = Ac . h (dT/dt)
   C. Q(T0 – T) = Ac . h (dT/dt)
   D. Q(T0 – T) = Ac . (dTH/dt)

7. Liquid flow rate in an open channel cannot be measured by a/an __________________?

   A. Orifice meter
   B. Cipolletti weir
   C. Rectangular weir
   D. V-notch

8. Specific gravity of a liquid cannot be measured by a/an __________________?

   A. Anemometer
   B. Specific gravity bottle
   C. Pycnometer
   D. Hydrometer

9. Liquid discharge from a tank or reservoir cannot be measured by __________________?

   A. Orificemeter
   B. Weirs
   C. Mouthpieces
   D. Notches

10. Small furnace draught is accurately measured by an inclined tube manometer, in which the manometric liquid used most commonly is __________________?

    A. Water
    B. Carbon tetrachloride
    C. Paraffin
    D. Ethylene glycol