List of top Mechanical Engineering Questions

The Titanium Nitride or Titanium Carbonitride coated cutting tools are majorly used to
As the cutting speed increases, how do the machining cost and tooling cost behave?
The vacuum is a mandatory requirement for which of the following non traditional machining process?
A device/mechanism used to position a work piece in the same position, cycle after the cycle is called
The secondary operation which is used to improve the self-lubricating capacity of the sintered part in powder metallurgy is
The welding process used for joining railway tracks is
The phenomenon where a metal part tends to partially return to its original shape after the forming tool is removed is known as
In MIG welding process, the commonly used gases for shielding are
Which one of the following metal has maximum value of yield strength?
Based on Iron-Carbon diagram, when austenite decomposes during cooling process, an eutectoid mixture is formed. The nature of the element is
A low projection on the drag surface of a casting commencing near the gate by erosion of sand due to the high velocity liquid metal in the bottom gating. This defect is known as:
The shrinkage allowance has been provided on the pattern to compensate the shrinkage when:
In a linearly hardening plastic material, the true stress beyond the initial yielding
The area under the linear curve of stress-strain diagram with in the elastic limit is known as
In order to increase the corrosion resistance of stainless steel, the following element is added
The whirl component of turbine blades is zero for the following turbine.
A single stage impulse turbine with a diameter of 1.2 m runs at 3000 rpm. If the blade speed ratio is 0.42, the inlet velocity of steam will be (in $\text{ms}^{-1}$)
In an ideal Brayton power cycle operated for the gas turbine plant, if \(T_1\) is the minimum temperature, \(T_3\) is the maximum temperature and pressure ratio is \(r_p\), then the net work ratio is given as
If regenerator is added to a Brayton cycle, the thermal efficiency is improved due to
Generally, in spark ignition engines, the compression ratio cannot be enhanced beyond certain limit because to avoid
The refrigerant and absorbent used in Vapour absorption refrigeration system respectively are
An air conditioning system mixes 30% fresh air at 35 $^\circ$C DBT and 50% RH with 70% recirculated air at 35 $^\circ$C DBT and 50% RH. Which of the following statements about "mixed air condition" is true?
If a substance is perfect crystal and existing at absolute zero K, then the specific entropy of the substance is
Based on second law of thermodynamics the loss in available energy is being quantified as
The clearance is provided in the reciprocating compressor with clearance ratio of `k'. If the pressure ratio is \(\frac{P_2}{P_1}\), then the volumetric efficiency in terms of clearance ratio k, is