ESE 2019: Technical Mini Mock Quiz-4 for ESE & GATE ME Exams

Question 1

A reaction-bonded silicon nitride ceramic has a strength of 300 MPa and a fracture toughness of 3.6 MPa

. With y = 1 in the fracture toughness equation, what is the largest size of internal crack that this material can withstand without fracturing?

Question 2

For ramjet engine, thrust is calculated using:

Question 3

Assertion (A) : A counter flow heat exchanger is more effective than a parallel flow heat exchanger.
Reason (R) : For same temperature limits of hot and cold fluids, the overall heat transfer coefficient of counter flow heat exchanger is more than parallel flow heat exchanger.

Question 4

Which of the following is a joint formed by interference fits?

Question 5

Direction: Each of the question consist of two statements, one labeled as the ‘Statement (I)’ and the other as ‘Statement (II)’. Examine these two statements carefully and select the answer to these items using the codes given below:

Statement (I): Ceramics withstand very high temperatures that range from 1000 °C to1600 °C.
Statement (II): Silicon carbide is an exception from among ceramics that can withstand high temperatures.

Question 6

Which among the following solid-state sensible heat storage materials needs high working temperature?

Question 7

A body of mass 10 kg with its CG 200 mm from the axis of rotation is to be completely balanced by another mass B of 5 kg placed in the same plane. The radius at which the CG of mass B should be is

Question 8

Consider the following statements regarding the law of Robotics :
1) A Robot shall not injure a human being orthrough inaction allow a human being harmed.
2) A Robot must obey orders given by humansexcept when such orders conflict with first law.
3) A Robot must always protect its ownexistence.
Which of the above statements are correct?

Question 9

In a lenoir cycle system as shown, what will be the change in internal energy during process 3-1, if system shows jet pulse in a pressure specific volume plane with following processes:
i) 1-2, isochoric where heat addition is 230 kJ/kg
ii) 2-3, adiabatic expansion where change in internal energy is - 75 kJ/kg
iii) 3-1, isobaric compression where heat rejection is 190 kJ/kg.

The net work output (kJ/kg) of the cycle and are

Question 10

The purpose of a thermostat in an engine cooling systems is to

Question 11

In the SI engine, highest Unburnt HydroCarbon concentration is observed during

Question 12

To find the functional relation among friction factor against Reynolds number for various pipe roughness values through Moody’s chart, so which among the following is not the quality of Moody’s chart.

Question 13

Spark sintering is a kind of hot pressure shaping technique in which

Question 14

To increase the toughness of martensitic steel, the steel is reheated at:

Question 15

When a rotor of mass 100 kg is mounted on a shaft, a bending deflection of 0.1 mm is observed at the place where the rotor is placed, what is the dangerous speed(rpm) of the rotor?