equal volumes of oxygen and acetylene
more volume of oxygen and less volume of acetylene
more volume of acetylene and less volume of oxygen
none of the above
✅ The correct answer is option A.
Engineering MCQs
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 negative rake is usually provided on
high carbon steel tools
high speed steel tools
cemented carbide tools
all of these
✅ The correct answer is option C.
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.
When a steel containing more than 0.8% carbon is cooled slowly below the lower critical point, it consists of
mainly pearlite
mainly ferrite
ferrite and pearlite
pearlite and cementite
✅ The correct answer is option D.
The sand used for making cores is
green sand
dry sand
loam sand
oil sand
✅ The correct answer is option D.
The efficiency of the dual combustion cycle for the same compression ratio, is __________ Diesel cycle.
greater than
less than
equal to
✅ 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.
A continuous beam is one which is
fixed at both ends
fixed at one end and free at the other end
supported on more than two supports
extending beyond the s
✅ 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.