What is the steam economy in case of a single effect evaporator system? < 1 >1 1 0.1 TRUE ANSWER : ? YOUR ANSWER : ?
Small scale evaporation is done in a Condenser Heat exchanger Multiple effect evaporator Steam jacketed kettle TRUE ANSWER : ? YOUR ANSWER : ?
The average heat transfer co-efficient over the entire length of the plate (ha) and the local heat transfer co-efficient (hL), in case of heat transfer over a flat plate in lminar zone is related as Ha = 0.8hL Ha = 2hL Ha = hL Ha= 5hL TRUE ANSWER : ? YOUR ANSWER : ?
LMTD for counterflow and prallel flow heat exchanger will be the same, when the Outlet temperature of hot fluid is less than the outlet temperature of the cold fluid Outlent temperature of both the hot and cold fluid are same Cold fluid is heated to a certain temperature by condensing steam (isothermal fluid) None of these TRUE ANSWER : ? YOUR ANSWER : ?
In a forward feed multiple effect, the pressure build up will be highest at the inlet of the last effect least at the outlet of the last effect least at the inlet of the first effect highest at the outlet of the last effect TRUE ANSWER : ? YOUR ANSWER : ?
The ratio of momentum diffusivity to thermal diffusivity is the __________ number. Prandtl Stanton Grashoff Nusselt TRUE ANSWER : ? YOUR ANSWER : ?
The local surface conductance for laminar film condensation on vertical surface is (where, t = film thickness) Independent of 't' ∝ t ∝ √t ∝ 1/t TRUE ANSWER : ? YOUR ANSWER : ?
Intermittant tube cleaning is possible to be done in case of a __________ evaporator. None of these Basket type Horizontal tube Calendria TRUE ANSWER : ? YOUR ANSWER : ?
In Joule's experiment, an insulated container contains 20 kg of water initially at 25°C. It is stirred by an agitator, which is made to turn by a slowly falling body weighing 40 kg through a height of 4 m. The process is repeated 500 times. The acceleration due to gravity is 9.8 ms⁻². Neglecting the heat capacity of agitator, the temperature of water (in °C) is 25 40.5 26.8 34.4 TRUE ANSWER : ? YOUR ANSWER : ?
A composite flat wall of a furnace is made of two materials 'A' and 'B'. The thermal conductivity of 'A' is twice of that of material 'B', while the thickness of layer of 'A' is half that of B. If the temperature at the two sides of the wall are 400 and 1200°K, then the temperature drop (in °K) across the layer of material 'A' is 133 125 150 160 TRUE ANSWER : ? YOUR ANSWER : ?