ME GATE 2011 - Online Test

Q1. Which one among the following welding processes uses non-consumable electrode?
Answer : Option C
Explaination / Solution:
No Explaination.


Q2. A simply supported beam PQ is loaded by a moment of 1kN-m at the mid-span of the beam as shown in the figure. The reaction forces RP and RQ at supports P and Q respectively are

Answer : Option A
Explaination / Solution:

Take moments about ‘Q’


Q3. The contents of a well-insulated tank are heated by a resistor of 23Ω in which 10A current is flowing. Consider the tank along with its contents as a thermodynamic system. The work done by the system and the heat transfer to the system are positive. The rates of heat (Q), work (W) and change in internal energy (∆U) during the process in kW are
Answer : Option A
Explaination / Solution:



Q4. The crystal structure of austenite is
Answer : Option B
Explaination / Solution:
No Explaination.


Q5. Figure shows the schematic for the measurement of velocity of air (density = 1.2kg /m3 ) through a constant–area duct using a pitot tube and a water-tube manometer. The differential head of water (density = 1000 kg /m3) in the two columns of the manometer is 10mm. Take acceleration due to gravity as 9.8m / s2. The velocity of air in m/s is 

Answer : Option C
Explaination / Solution:

 From Bernoulli’s equation


Q6. A double – parallelogram mechanism is shown in the figure. Note that PQ is a single link. The mobility of the mechanism is 

Answer : Option C
Explaination / Solution:
No Explaination.


Q7. The values of enthalpy of steam at the inlet and outlet of a steam turbine in a Rankine cycle are 2800kJ/kg and 1800kJ/kg respectively. Neglecting pump work, the specific steam consumption in kg/kW-hour is
Answer : Option A
Explaination / Solution:

Work done by the turbine
W = 2800 – 1800 = 1000 kJ/kg = 1000 kW-s/kg
Specific fuel consumption = (1/1000)×3600 = 3.6 kg / kw-hr

Q8. Match the following non-traditional machining processes with the corresponding material removal mechanisms : 
Machining process                                 Mechanism of material removal 
P. Chemical machining                          1. Erosion 
Q. Electro-chemical machining              2. Corrosive reaction 
R. Electro – discharge machining          3. Ion displacement 
S. Ultrasonic machining                         4. Fusion and vaporization 
Answer : Option A
Explaination / Solution:
No Explaination.


Q9. A hole is dimension  mm. The corresponding shaft is of dimension  mm. The resulting assembly has
Answer : Option C
Explaination / Solution:
No Explaination.


Q10. The ratios of the laminar hydrodynamic boundary layer thickness to thermal boundary layer thickness of flows of two fluids P and Q on a flat plate are 1/2 and 2 respectively. The Reynolds number based on the plate length for both the flows is 104. The Prandtl and Nusselt numbers for P are 1/8 and 35 respectively. The Prandtl and Nusselt numbers for Q are respectively
Answer : Option A
Explaination / Solution: