Mechanical Engineering - Online Test
Q1. Vehicle manufacturing assembly line is an example of
Answer : Option A
Explaination / Solution:
No Explaination.
Q2. The homogeneous state of stress for a metal part undergoing plastic deformation is
Where the stress component values are in MPa. Using von Mises yield criterion, the value of
estimated shear yield stress, in MPa is
Answer : Option B
Explaination / Solution:
No Explaination.
Q3. The pressure, temperature and velocity of air flowing in a pipe are 5 bar, 500 K
and 50 m/s, respectively. The specific heats of air at constant pressure and at
constant volume are 1.005 kJ/kgK and 0.718 kJ/kgK, respectively. Neglect
potential energy. If the pressure and temperature of the surroundings are 1 bar
and 300 K, respectively, the available energy in kJ/kg of the air stream is
Answer : Option B
Explaination / Solution:
No Explaination.
Q4. Which of the following is a solution to the differential equation 
Answer : Option B
Explaination / Solution:
Q5. For tool A, Taylor’s tool life exponent (n) is 0.45 and constant (K) is 90. Similarly
for tool B, n=0.3 and K=60. The cutting speed (in m/min) above which tool A will
have a higher tool life than tool B is
Answer : Option A
Explaination / Solution:
No Explaination.
Q6. A force of 400 N is applied to the brake drum of 0.5 m diameter in a band-brake system as shown
in the figure, where the wrapping angle is 180°. If the coefficient of friction between the drum
and the band is 0.25, the braking torque applied, in N.m is
Answer : Option B
Explaination / Solution:
No Explaination.
Q7. 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 
f q''w = 2500x, where x is in m and in the direction of flow (x=0 at the inlet), the
bulk mean temperature of the water leaving the pipe in °C is
Answer : Option B
Explaination / Solution:
Q8. The probability density function (pdf) of random variable is as shown below
The corresponding commutative distribution function CDF has the form
Answer : Option A
Explaination / Solution:
No Explaination.
Q9. Annual demand for window frames is 10000. Each frame costs Rs. 200 and
ordering cost is Rs. 300 per order. Inventory holding cost is Rs. 40 per frame per
year. The supplier is willing to offer 2% discount if the order quantity is 1000 or
more, and 4% if order quantity is 2000 or more. If the total cost is to be
minimized, the retailer should
Answer : Option C
Explaination / Solution:
No Explaination.
Q10. A solid circular shaft needs to be designed to transmit a torque of 50 N.m. If the allowable shear
stress of the material is 140 MPa, assuming a factor of safety of 2, the minimum allowable design
diameter in mm is
Answer : Option B
Explaination / Solution:
No Explaination.
