Specific conductance is defined as the reciprocal of resistance in ohms of 1c.c. of liquid at a specified temperature. Its value for distilled water is about ______________ micro mho/cm3?

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. Platinum resistance thermometer can be used upto antimony point which is ____________ °C, and is the temperature of equilibrium between solid antimony & liquid antimony at normal atmospheric pressure?

   A. 961.93
   B. 630.74
   C. 1064.43
   D. 1261.93

3. Continuous shell temperature measurement in a liquid-liquid heat exchanger is done by a __________________?

   A. Thermocouple
   B. Resistance thermometer
   C. Mercury in glass thermometer
   D. Vapor pressure thermometer

4. 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

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. 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

7. 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

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

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

9. Continuous measurement of specific gravity of a liquid is done by __________________?

   A. Hydrometer
   B. Contact-type electric indicators
   C. Displacement meter
   D. Both A. and C.

10. Thermistor, which has high temperature co-efficient of resistivity, is used as the sensing element in resistance thermometer. It is a/an ?

    A. Insulator
    B. Conductor
    C. Solid semi-conductor
    D. Liquid semi-conductor