Mechanical Engineering - Online Test
Q1. Water (specific heat, cp = 4.18 kJ / kgK) enters a pipe at a rate of 0.01 kg/s and a temperature of 20 C° . The pipe, of diameter 50 mm and length 3m, is subjected to a wall heat flux 
If q''w = 5000, and the convection heat transfer coefficient at the pipe outlet is 1000 W / m2K, the temperature in °C at the inner surface of the pipe at the outlet
Answer : Option D
Explaination / Solution:
No Explaination.
Q2. The recursion relation to solve x = e-x using Newton - Raphson method is
Answer : Option C
Explaination / Solution:
Q3. During inelastic collision of two particles, which one of the following is conserved?
Answer : Option A
Explaination / Solution:
No Explaination.
Q4. Two steel truss members, AC and BC, each having cross sectional area of 100 mm2, are
subjected to a horizontal force F as shown in figure. All the joints are hinged
. If F = 1 kN, the magnitude of the vertical reaction force developed at the point B in kN is
Answer : Option A
Explaination / Solution:
No Explaination.
Q5. In a simple Brayton cycle, the pressure ration is 8 and temperatures at the
entrance of compressor and turbine are 300 K and 1400 K, respectively. Both
compressor and gas turbine have isentropic efficiencies equal to 0.8. For the
gas, assume a constant value of cp (specific heat at constant pressure) equal to
1 kJ/kgK and ratio of specific heats as 1.4. Neglect changes in kinetic and
potential energies.
The power required by the compressor in kW/kg of gas flow rate is
Answer : Option C
Explaination / Solution:
Q6. The residue of the function 
at z = 2 is
at z = 2 is
Answer : Option A
Explaination / Solution:
Q7. If a particular Fe-C alloy contains less than 0.83% carbon, it is called
Answer : Option B
Explaination / Solution:
No Explaination.
Q8. Two steel truss members, AC and BC, each having cross sectional area of 100 mm2, are subjected to a horizontal force F as shown in figure. All the joints are hinged
The maximum force F in kN that can be applied at C such that the axial stress in any of the truss
members DOES NOT exceed 100 MPa is
Answer : Option B
Explaination / Solution:
No Explaination.
Q9. In a simple Brayton cycle, the pressure ration is 8 and temperatures at the
entrance of compressor and turbine are 300 K and 1400 K, respectively. Both
compressor and gas turbine have isentropic efficiencies equal to 0.8. For the
gas, assume a constant value of cp (specific heat at constant pressure) equal to
1 kJ/kgK and ratio of specific heats as 1.4. Neglect changes in kinetic and
potential energies.
The thermal efficiency of the cycle in percentage (%) is
Answer : Option A
Explaination / Solution:
No Explaination.
Q10.
Consider the matrix 
The value of eP is
The value of eP is
Answer : Option D
Explaination / Solution:
