Heat transfer by ______________ is almost absent in case of fluidised bed drying operation?
A. Radiation
B. Conduction
C. Convection
D. Both B. & C.
Chemical Engineering Basics
What is the range of tempering temperature (°C) for most of the materials ?
What is the range of tempering temperature (°C) for most of the materials ?
A. 75-100
B. 200-300
C. 350-450
D. 500-600
Boiler draught of 10 mm water column is equivalent to_____________________?
Boiler draught of 10 mm water column is equivalent to_____________________?
A. 1 kgf/m2
B. 10 kgf/m2
C. 10 kgf/mm2
D. 1 kgf/mm2
Surface tension of a liquid_________________?
Surface tension of a liquid_________________?
A. Is due to intermolecular forces of cohesion
B. Decreases with rise in temperature
C. Is responsible for the spherical shape of an isolated liquid drop
D. All A, B. & C
Gas turbine normally employs a constant _______________ cycle?
Gas turbine normally employs a constant _______________ cycle?
A. Pressure
B. Temperature
C. Volume
D. None of these
Depreciation of machines fails under the indirect expenses head. As per income tax regulations, it is calculated by the __________________ method?
Depreciation of machines fails under the indirect expenses head. As per income tax regulations, it is calculated by the __________________ method?
A. Diminishing balance
B. Sinking fund
C. Multiple straight line
D. Sum of the years digit
An example of unsteady non uniform flow is the flow of liquid under pressure through a__________________?
An example of unsteady non uniform flow is the flow of liquid under pressure through a__________________?
A. Tapering pipe at constant flow rate
B. Tapering pipe at either decreasing or increasing flow rate
C. Long pipeline of constant diameter
D. None of these
A material subjected ________________ must have high resilience?
A material subjected ________________ must have high resilience?
A. Shock loading
B. Vibration
C. Fatigue
D. Tension
A steam pipe is intended to be insulated with two layers of insulating materials of different thermal conductivities. For minimum heat transfer to take place_________________?
A steam pipe is intended to be insulated with two layers of insulating materials of different thermal conductivities. For minimum heat transfer to take place_________________?
A. The better insulation material should be put just next to pipe (i.e., inside)
B. The better insulating material should be put outside
C. Either of the insulating material could be put on either side
D. Steam temperature is considered before deciding as to which insulating material is to be put
inside (i.e., just next to the pipe)
Lead is added to 60:40 brass primarily to improve_________________?
Lead is added to 60:40 brass primarily to improve_________________?
A. Machinability
B. Corrosion resistance
C. Fluidity
D. Strength