Silver point temperature is ______________ °C?

Related Mcqs:

1. 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)

2. Normal mercury thermometer can be used to measure a temperature of about 300°C. However, its maximum temperature measurement range can be increased upto about 500°C by__________________?

   A. Filling nitrogen under pressure in the stem
   B. Increasing the diameter of the tube
   C. Using steel tube in place of glass tube
   D. Accounting for the tube expansion

3. 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.

4. Working principle of mercury in glass thermometer is based on volumetric expansion of mercury with increase in temperature. Which of the following undergoes minimum volumetric expansion for a given temperature change ?

   A. Water
   B. Mercury
   C. Methyl alcohol
   D. Carbon-tetrachloride

5. 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

6. The ____________ of the fluid contained in the temperature sensing element (i.e., bulb) of filled system thermometers changes with change in temperature ?

   A. Pressure
   B. Volume
   C. Viscosity
   D. All A., B. and C.

7. Dilute wine was used as a thermometric liquid initially to develop temperature scale. First empirical temperature scale developed was the _____________ scale?

   A. Kelvin
   B. Centigrade
   C. Fahrenheit
   D. Reaumer

8. Water is flowing through a series of four tanks and getting heated as shown in figure. It is desired to design a cascade control scheme for controlling the temperature of water leaving the tank 4 as there is a disturbance in the temperature of a second stream entering the tank 2. Select the best place to take the secondary measurement for the second loop?

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

9. Ordinary mercury in glass thermometer is used for measuring temperature upto 120°C. However, for measuring higher temperature upto __________ °C, thermometer is made by filling nitrogen under pressure above the mercury, which stops the evaporation of mercury and reduces the chance of broken thread of mercury?

   A. 250
   B. 350
   C. 550
   D. 700

10. Helium gas constant volume thermometer is suitable for the measurement of a temperature of ______________ °C?

    A. < 100
    B. < 0
    C. > 0
    D. > 800