recirculates exhaust gasses
burns fuel vapaour gasses
reduces N2, H2O, and CO2 emission levels
removes CO, HC, and NO
✅ The correct answer is option D.
Mechanical Engineering MCQs
In the austempering process of heat treatment, austenite changes into
martensite
troostite
sorbite
bainite
✅ The correct answer is option D.
A bottoming tap has
its end tapered for about three or four threads
its end tapered for about eight or ten threads
full threads for the whole of its length
none of the above
✅ The correct answer is option C.
The oxidising flame is similar to neutral flame but the inner cone is less luminous and shorter.
Yes
No
✅ The correct answer is option A.
The time taken by a particle for one complete oscillation is known as periodic time.
Agree
Disagree
✅ The correct answer is option A.
The load required to produce a unit deflection in a spring is called
flexural rigidity
torsional rigidity
spring stiffness
Young’s modulus
✅ The correct answer is option C.
For low and moderate speed engines, the cam follower should move with
uniform velocity
simple harmonic motion
uniform accleration and retardation
cycloidal motion
✅ The correct answer is option B.
Standard time is equal to
normal time minus allowances
normal time plus allowances
representative time multiplied by rating factor
normal time taken by a
✅ The correct answer is option B.
Two speed reverse gear arrangement is generally provided in case of
passenger cars
metadors
tractors
trucks
✅ The correct answer is option C.
The dressing and truing of grinding wheel are done with the same tools but not for the same purpose.
Agree
Disagree
✅ The correct answer is option A.