vertical
horizontal
inclined
✅ The correct answer is option C.
Mechanical Engineering MCQs
A very sensitive governor will cause hunting.
TRUE
FALSE
✅ The correct answer is option A.
A rotor which is balanced statically but not dynamically is supported on two bearings L apart and at high speed of the rotor, reaction on the left bearing is R. The right side of the bearing is shifted to a new position 2 L apart from the left bearing. At the same rotor speed, dynamic reaction on the left bearing in the new arrangement will
remain same as before
become equal to 2 R
become equal to R/2
become equal to R/4
✅ The correct answer is option A.
The indicated mean effective pressure of an engine is obtained from the indicator diagram drawn with the help of an engine indicator.
TRUE
FALSE
✅ The correct answer is option A.
The ratio of pitch circle diameter in millimetres to the number of teeth, is called
circular pitch
diametral pitch
module
none of these
✅ The correct answer is option C.
The main alloying elements high speed steel in order of increasing proportion are
vanadium, chromium, tungsten
tungsten, titanium, vanadium
chromium, titanium, vanadium
tungsten, chromium, ti
✅ The correct answer is option A.
All the steel trusses of the bridges, have one of their end roller supported, and other end hinged. The main advantage of such a support is that the truss remains stable.
TRUE
FALSE
✅ The correct answer is option A.
The undesireable property of a refrigerant is
non-toxic
non-flammable
non-explosive
high boiling point
✅ The correct answer is option D.
The overall efficiency of the compressed air system is the
ratio of shaft output of the air motor to the shaft input to the compressor
ratio of shaft input to the compressor to the shaft output of air motor
product of shaft output of air motor and shaft input to the compressor
none of the above
✅ The correct answer is option A.