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- Question 1 of 21
The maximum theoretical work obtainable, when a system interacts to equilibrium with a reference environment, is calledCorrectIncorrect
- Question 2 of 21
For a completely submerged body with centre of gravity ‘G’ and centre of buoyancy ‘B’, the condition of stability will beCorrectIncorrect
- Question 3 of 21
In a power plant, water (density = 1000 kg/m3) is pumped from 80 kPa to 3 MPa. The pump has an isentropic efficiency of 0.85. Assuming that the temperature of the water remains the same, the specific work (in kJ/kg) supplied to the pump isCorrectIncorrect
- Question 4 of 21
Which one of the following is a CFC refrigerant?CorrectIncorrect
- Question 5 of 21
The jobs arrive at a facility, for service, in a random manner. The probability distribution of number of arrivals of jobs in a fixed time interval isCorrectIncorrect
- Question 6 of 21
In exponential smoothening method, which one of the following is true?CorrectIncorrect
- Question 7 of 21
For machining a rectangular island represented by coordinates P(0,0), Q(100,0), R(100,50) and S(0,50) on a casting using CNC milling machine, an end mill with a diameter of 16 mm is used.The trajectory of the cutter centre to machine the island PQRS isCorrectIncorrect
- Question 8 of 21
Which one of the following instruments is widely used to check and calibrate geometric features of machine tools during their assembly?CorrectIncorrect
- Question 9 of 21
The major difficulty during welding of aluminium is due to itsCorrectIncorrect
- Question 10 of 21
The main cutting force acting on a tool during the turning (orthogonal cutting) operation of a metal is 400 N. The turning was performed using 2 mm depth of cut and 0.1 mm/rev feed rate. The specific cutting pressure (in N/mm2) isCorrectIncorrect
- Question 11 of 21
The process of reheating the martensitic steel to reduce its brittleness without any significant loss in its hardness isCorrectIncorrect
- Question 12 of 21
In solid-state welding, the contamination layers between the surfaces to be welded are removed byCorrectIncorrect
- Question 13 of 21
A pair of spur gears with module 5 mm and a center distance of 450 mm is used for a speed reduction of 5:1. The number of teeth on pinion isCorrectIncorrect
- Question 14 of 21
Consider a cantilever beam, having negligible mass and uniform flexural rigidity, with length 0.01 m. The frequency of vibration of the beam, with a 0.5 kg mass attached at the free tip, is 100 Hz. The flexural rigidity (in N.m2) of the beam isCorrectIncorrect
- Question 15 of 21
An ideal water jet with volume flow rate of 0.05 m3/s strikes a flat plate placed normal to its path and exerts a force of 1000 N. Considering the density of water as 1000 kg/m3, the diameter (in mm) of the water jet isCorrectIncorrect
- Question 16 of 21
A block weighing 200 N is in contact with a level plane whose coefficients of static and kinetic friction are 0.4 and 0.2, respectively. The block is acted upon by a horizontal force (in newton) P=10t, where t denotes the time in seconds. The velocity (in m/s) of the block attained after 10 seconds isCorrectIncorrect
- Question 17 of 21
A slider crank mechanism has slider mass of 10 kg, stroke of 0.2 m and rotates with a uniform angular velocity of 10 rad/s. The primary inertia forces of the slider are partially balanced by a revolving mass of 6 kg at the crank, placed at a distance equal to crank radius. Neglect the mass of connecting rod and crank. When the crank angle (with respect to slider axis) is 30°, the unbalanced force (in newton) normal to the slider axis is _______CorrectIncorrect
- Question 18 of 21
A hydrodynamic journal bearing is subject to 2000 N load at a rotational speed of 2000 rpm. Both bearing bore diameter and length are 40 mm. If radial clearance is 20 μm and bearing is lubricated with an oil having viscosity 0.03 Pa.s, the Sommerfeld number of the bearing isCorrectIncorrect
- Question 19 of 21
A 200 mm long, stress free rod at room temperature is held between two immovable rigid walls. The temperature of the rod is uniformly raised by 250°C. If the Young’s modulus and coefficient of thermal expansion are 200 GPa and 1×10−5 (power -5) /°C, respectively, the magnitude of the longitudinal stress (in MPa) developed in the rod isCorrectIncorrect
- Question 20 of 21
1.5 kg of water is in saturated liquid state at 2 bar (vf = 0.001061 m3/kg, uf = 504.0 kJ/kg, hf = 505 kJ/kg). Heat is added in a constant pressure process till the temperature of water reaches 400°C (v = 1.5493 m3/kg, u = 2967.0 kJ/kg, h = 3277.0 kJ/kg). The heat added (in kJ) in the process isCorrectIncorrect
- Question 21 of 21
Water flows through a pipe having an inner radius of 10 mm at the rate of 36 kg/hr at 25°C. The viscosity of water at 25°C is 0.001 kg/m.s. The Reynolds number of the flow isCorrectIncorrect