Online Mechanical Engineering Test - Mechanical Engineering Test - Random

Instruction:

  • This is a FREE online test. Beware of scammers who ask for money to attend this test.
  • Total number of questions: 20.
  • Time allotted: 30 minutes.
  • Each question carries 1 mark; there are no negative marks.
  • DO NOT refresh the page.
  • All the best!

Marks : 2/20


Total number of questions
20
Number of answered questions
0
Number of unanswered questions
20
Test Review : View answers and explanation for this test.

1.
According to parallel axis theorem, the moment of inertia of a section about an axis parallel to the axis through centre of gravity (i.e. IP) is given by(where, A = Area of the section, IG = Moment of inertia of the section about an axis passing through its C.G., and h = Distance between C.G. and the parallel axis.)
IP = IG + Ah2
IP = IG - Ah2
IP = IG / Ah2
IP = Ah2 / IG
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2.
A machine which is capable of doing work in the reversed direction, after the effort is removed, is called a non-reversible machine.
Yes
No
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3.
A shaft of diameter D is subjected to a twisting moment (T) and a bending moment (M). If the maximum bending stress is equal to maximum shear stress developed, then M is equal to
T/2
T
2T
4T
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4.
A body is subjected to a tensile stress of 1200 MPa on one plane and another tensile stress of 600 MPa on a plane at right angles to the former. It is also subjected to a shear stress of 400 MPa on the same planes. The maximum shear stress will be
400 MPa
500 MPa
900 MPa
1400 MPa
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5.
A flow through a long pipe at constant rate is called
steady uniform flow
steady non-uniform flow
unsteady uniform flow
unsteady non-uniform flow
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6.
The distillation carried out in such a way that the liquid with the lowest boiling point is first evaporated and recondensed, then the liquid with the next higher boiling point is then evaporated and recondensed, and so on until all the available liquid fuels are separately recovered in the sequence of their boiling points. Such a process is called
cracking
carbonisation
fractional distillation
full distillation
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7.
The heating of a gas at constant pressure is governed by
Boyle's law
Charles' law
Gay-Lussac law
Avogadro's law
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8.
Number of working strokes per min. for a four stroke cycle engine are __________ the speed of the engine in r.p.m.
equal to
one-half
twice
four-times
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9.
In a jet engine, the compression varies as the square of the speed.
Correct
Incorrect
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10.
A turbo-prop is preferred to turbo-jet because
it has high propulsive efficiency at high speeds
it can fly at super sonic speeds
it can fly at high elevations
it has high power for take off
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11.
The expansion valve in a refrigerator controls the flow of refrigerant.
Correct
Incorrect
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12.
The dry bulb temperature during sensible heating of air
remains constant
increases
decreases
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13.
The material of pipe lines for a system using freon as a refrigerant should be
brass
copper
steel
aluminium
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14.
Which of the following material has the maximum ductility?
Mild steel
Copper
Zinc
Aluminium
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15.
The centre to centre distance between two consecutive rivets in a row, is called
margin
pitch
back pitch
diagonal pitch
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16.
Hard and tough materials like cast iron should be turned at
slow speed
high speed
any speed
certain specific speed
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17.
In break even analysis, total cost consists of
fixed cost + sales revenue
variable cost + sales revenue
fixed cost + variable cost
fixed cost + variable cost + profit
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18.
P.M.T.S. (Predetermined Motion Time Systems) include
M.T.M. (Method Time Measurement)
W.F.S. (Work Factor Systems)
B.M.T.S. (Basic Motion Time Study)
all of these
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19.
A laminated glass upon cracking
bursts into sharp edged fragments
bursts into granular pieces
sandwiched layer traps the fragments
breaks into the form of crystals
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20.
A machine mounted on a single coil spring has a period of free vibration of tp . If the spring is cut into four equal parts and placed in parallel and the machine is mounted on them, then the period of free vibration of the new system will become
tp/16
tp/4
4 tp
16 tp
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*** END OF THE TEST ***
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