GATE 2021 ME : Toppers Quiz 33 (App update required to attempt this test) for ESE & GATE ME Exams

Question 1

Hoop stress of a thin pressure vessel is given by

Question 2

The Prandtl Number approximates ___________

Question 3

During sensible cooling process __________.

Question 4

The coolant to be employed in liquid cooling system should have

Question 5

PLC's I/O capability will include signal from:

Question 6

The critical path of a network represents______.

Question 7

A block of mass m rests on an inclined plane and is attached by a string to the wall as shown in the figure. The coefficient of static friction between the plane and the block is 0.25. The string can withstand a maximum force of 20 N. The maximum value of the mass (m) for which the string will not break and the block will be in static equilibrium is ____________ kg.
Take cosθ = 0.8 and sinθ = 0.6.
Acceleration due to gravity g = 10 m/s²

Question 8

Reheat factor for a multi-stage steam turbine is the ratio of:

Question 9

Which one of the following is most symmetrical ________?

Question 10

Streamline and Equipotential lines in a flow field______.

Question 11

Consider the following instances of fluid flow in machines
P: Inlet to the casing of pump.
Q: Inlet to the impeller of pump.
R: Inlet to the Draft Tube.
S: Exit of the Draft tube.
The possible regions where cavitation can occur are

Question 12

During forging of a solid cylinder, the final diameter comes out to be 2 times the initial, the percentage change in height will be _________.

Question 13

A bolted joint has four bolts arranged as shown in figure. The cross sectional area of each bolt is 25 mm². A torque T = 200 N-m is acting on the joint. Neglecting friction due to clamping force, maximum shear stress in a bolt is_____ MPa.

Question 14

A project consists of six activities. The immediate predecessor of each activity and the estimated duration is also provided in the table below:

If all activities other than S take the estimated amount of time, the maximum duration (in weeks) of the activity S without delaying the completion of the project is ___________

Question 15

Optimal solution of any linear programming problem is always obtained from____.

Question 16

A 30 cm diameter Horizontal Pipe terminates in a nozzle with exit diameter of 5 cm. If water flows through the Pipe at a rate of 0.2 m³/s. What force (in MN) will be exerted by fluid on nozzle.

Question 17

The casting process which uses an expendable mould is :

Question 18

The number of degrees of freedom of a planar mechanism with 10 links and 10 simple revolute joints is

Question 19

An arc welding process is carried out with open circuit voltage 200 V and short circuit current of 1200 A. The power characteristics is linear and the voltage arc length relationship is given as V=48+4L(V in volt and L in mm).For the maximum power condition find the arc length in mm

Question 20

A hollow shaft (d_o = 2d_i where d_o and d_i are the outer and inner diameters respectively) needs to transmit 20 kW power at 3000 RPM. If the maximum permissible shear stress is 30 MPa, d_o is

Question 21

A hole and shaft have a basic size of 40 mm and are to have a clearance fit with maximum clearance of 0.05 mm and minimum clearance of 0.03 mm, the hole tolerances is 2 times the shaft tolerance. The maximum limit for hole and minimum limit for hole using hole basic system will be _____.

Question 22

The reading of the pressure gauge fitted on a vessel is 12 bar. The atmospheric pressure is 10.3 bar and the value of g is 9.81m/s2. The absolute pressure in the vessel is:

Question 23

In ammonia water absorption system heat is supplied to generator by condensing steam at 0.2 MPa, 120.2^oC. The Temperature to be maintained in refrigerator is -10^oC and surrounding temperature is 30^oC . Find Maximum COP of refrigerator.

Question 24

A ball pen manufacturer produces refill and barrel. The work department is capable of producing 20000 refills or 10000 barrels or any other combinations of these per week. The demand for refills and barrels is limited to 15000 and 8000 units per week respectively. The profit per unit from refill is 1 rs. And that from barrel is 3 rs. The maximum profit to the manufacturer in rupees will be

Question 25

What will be ratio of stiffness of spring 1 to that of spring 2, if spring 2 has coil diameter and wire diameter twice and four times that of spring 1, respectively?