TD+HT+FM Quiz
Thermal Dynamics & Heat Transfer Quiz
Test your knowledge on thermal dynamics, heat transfer, and fluid mechanics with this engaging quiz! Dive into practical applications and theoretical concepts designed for engineering enthusiasts.
Each question challenges your understanding and helps reinforce key principles. Get ready to tackle:
- Thermal conductivity
- Carnot engine efficiency
- Flow measurement techniques
- Pump performance dynamics
Rods of the same size of two different materials P and Q placed end to end in thermal contact and heavily lagged at their sides. The outer ends of P and Q are kept at 0°C and 100°C respectively. The thermal conductivity of P is four times that of Q. The steady state temperature of the interface is
20°C
75°C
25°C
80°C
A drop of water is sprinkled on a red hot iron plate. The drop forms a small sphere but does not vaporize immediately. This happens because
Red hot iron is a poor conductor of heat
A layer of water vapour between the drop and plate prevents conduction of heat
Boiling point of water is raised
None of these
A Carnot engine uses nitrogen as the working fluid (γ = 1.4). The heat supplied is 52 kJ and adiabatic expansion ratio is 32 : 1. The receiver temperature is 295 K. The amount of heat rejected is ______kJ.
10
12
13
14
The air with enthalpy of 100 kJ/kg is compressed by an air compressor to a pressure and temperature at which its enthalpy becomes 200 kJ/kg. The loss of heat is 40 kJ/kg from the compressor as the air passes through it. Neglecting kinetic and potential energies, the power required for an air mass flow of 0.5 kg/s is ___ kW.
50
57
65
70
In an orifice meter, if the pressure drop across the orifice is overestimated by 5% then the PERCENTAGE error in the measured flow rate is
1.57
2.46
3.26
None of these.
A pump draws oil (specific gravity 0.8) from a storage tank and discharges it to an overhead tank. The mechanical energy delivered by the pump to the fluid is 50 J/kg. The velocities at the suction and the discharge points of the pump are 1 m/s and 7 m/s, respectively. Neglecting friction losses and assuming kinetic energy correction factor to be unity, the pressure developed by the pump (in kN/m2)
80
40
20.8
19.2
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