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ISRO ME Exam 2017: Full Syllabus Mini Mock-4

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Question 1

A 4-cylinder diesel running at 1200 r.p.m. developed 18.6 kW. The average torque when one cylinder was cut out was 105 N m. If the calorific value of the fuel was 42000 kJ/kg and the engine used 0.34 kg of diesel/kW hr, the indicated thermal efficiency was nearly

Question 2

Consider the following statements:
Arterfacts to prevent harmful effects resulting from vibrations of an unbalanced machine fixed on its foundation include
1) mounting the machine on springs thereby minimizing the transmission of forces
2) using vibration isolating materials to prevent or reduce the transmission of forces
3) moving the foundation so as to have only degree of freedom towards reducing the transmission of forces
Which of the above statements are correct?

Question 3

A hub is press fitted on a shaft. An element in the hub is subjected to a radial compressive stress of 50 N/mm² and hoop stress of 75 N/mm². If the hub is made of 30C8 steel with yield strength,

_y= 350 N/mm², what is the factor of safety using maximum shear stress theory?

Question 4

A metric thread of pitch 2 mm and thread angle 60 ° is inspected for its pitch diameter using the 3-wire method. The indicated diameter of the wire will be nearly

Question 5

What will be the torque carrying capacity of a clutch having external and internal radius as 80 mm and 30 mm, if a constant pressure of 4 MPa with 0.7 coefficient of friction of liner material is applied?

Question 6

The effectiveness of a counter-flow heat exchanger has been estimated as 0.25. Hot gases enter at 200 °C and leave at 75 °C. Cooling air enters at 40 °C. The temperature of the air leaving the unit will be:

Question 7

Consider the following statements pertaining to stability of floating bodies:
1) A floating body will be stable when the centre of gravity is above the centre of buoyancy.
2) The position of metacentres corresponding to different axes of rotation are generally different for the same floating object.
3) For cargo ships, the metacentric height varies with loading.

Which of the above statements are correct?

Question 8

A boy walks up a stalled escalator in 90 seconds. When the same escalator moves, he is carried up in 60 seconds. How much time would it take him to walk up the moving escalator?

Question 9

The recrystallization behavior of a particular metal alloy is specified in terms of recrystallization temperature, which is typically 1/3rd of the absolute melting temperature of a metal or an alloy and depends on several factors including the amount of
1) cold working and purity of the metal and alloy
2) hot working and purity of the metal and alloy
Which of the above is/are correct?

Question 10

Consider the matrix

. The sum of its eigen values is _______.

Question 11

From 6 positive and 8 negative numbers, 3 numbers are chosen at random (without replacement) and multiplied.the probability that the product is positive will be _________.

Question 12

$Description: D:\GradeStack Courses\GATE Tests (Sent by Ravi)\GATE-ME-2014-Set-2_files\image018.png$ is equal to

Question 13

The tank contains water and immiscible oil at 20 °C. The height h (in cm), if the density of the oil is 898 kg/m³ will be _______.

Question 14

What will be the quantity of heat added to the system? If a cylinder containing the air comprises the system. Cycle is completed as follows:
85000 N-m of work is done by the piston on the air during compression stroke and 50 kJ of heat are rejected to the surroundings.
During expansion stroke 100000 N-m of work is done by the air on the piston.

Question 15

A cup is drawn through blank having draw ratio of 3, having height of 20 mm. Calculate the diameter of blank?

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