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AAI Technical Mini Mock-1

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Question 1

A wire rope for a vertical mine hoist to lift a load of 50 kN from a depth of 150 meters. Wire rope attain the speed of 10 m/s in 10 seconds. Additional load due to upward acceleration of rope is ___________ N.

Question 2

In this curve axis X and Y represents (based on the usual standards)

Question 3

Gate is provided in moulds to:

Question 4

A Carnot heat engine is operating between a source at T_H and a sink at T_L. If it is desired to double the thermal efficiency of this engine, keeping the sink temperature constant. What should be the new source temperature (T_H)?

Question 5

Consider the following PERT network:

The critical path duration of the network (in days) is _______.

Question 6

The process utilizing mainly thermal energy for removing material is

Question 7

A counter flow heat exchanger is employed to cool 0.55 kg/s (

) of oil from 115 °C to 40 °C by the use of water. The inlet and outlet temperature of cooling water (

) are 15 °C and 75 °C, respectively. The effectiveness of the heat exchanger is ____.

Question 8

In a counter-flow heat exchanger,having same heat capacity for the two fluids. The hot fluid is cooled from 110 °C to 80 °C by a cold fluid which gets heated from 30 °C to 60 °C. LMTD for the heat exchanger is

Question 9

The use of a draft tube in a reaction type water turbine helps to

Question 10

The product of module and diametral pitch is equal to,

Question 11

Modulus of rigidity is the ratio of:

Question 12

Degree of freedom of structure is______.

Question 13

A reversible engine operates between temperatures $Description: E:\Gate\SSC JE Mechanical Part 1\Practice-Set-9_files\image041.png$ and $Description: E:\Gate\SSC JE Mechanical Part 1\Practice-Set-9_files\image042.png$ . The energy rejected by this engine is received by a second reversible engine at temperature $Description: E:\Gate\SSC JE Mechanical Part 1\Practice-Set-9_files\image042.png$ and rejected to a reservoir at temperature $Description: E:\Gate\SSC JE Mechanical Part 1\Practice-Set-9_files\image043.png$ . If the efficiencies of the engines are same then the relationship between $Description: E:\Gate\SSC JE Mechanical Part 1\Practice-Set-9_files\image041.png$ , $Description: E:\Gate\SSC JE Mechanical Part 1\Practice-Set-9_files\image042.png$ and $Description: E:\Gate\SSC JE Mechanical Part 1\Practice-Set-9_files\image043.png$ is given by

Question 14

In SI engines for higher thermal efficiency _________.

Question 15

The friction torque, transmitted in case of flat pivot bearing for uniform ratio of wear is equal to

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ESE & GATE ME General

Oct 12ESE & GATE ME