Correct
Incorrect
✅ The correct answer is option A.
Mechanical Engineering MCQs
The efficiency of the Carnot cycle is (where T1 and T2 = Highest and lowest temperature during the cycle)
✅ The correct answer is option C.
A body is subjected to a direct tensile stress of 300 MPa in one plane accompanied by a simple shear stress of 200 MPa. The maximum normal stress will be
-100 MPa
250 MPa
300 MPa
400 MPa
✅ The correct answer is option D.
In a crossed belt drive, the shafts are arranged parallel and rotate in the same directions.
Correct
Incorrect
✅ The correct answer is option B.
In a petrol engine, the charge is ignited with the help of a spark plug.
Yes
No
✅ The correct answer is option A.
A dummy activity in a net work diagram
is represented by a dotted line
is an artificial activity
does not consume time or resources
all of these
✅ The correct answer is option D.
The brake warning light warns the driver of
water in the master cylinder
air in the hydraulic system
failure of the primary or secondary circuit of hydraulic system
power-brake failure
✅ The correct answer is option C.
A screw is said to be over hauling screw, if the
friction angle is less than helix angle
friction angle is more than helix angle
friction angle is equal to helix angle
efficiency of screw is
✅ The correct answer is option A.
In mechanical refrigeration system, the refrigerant has the maximum temperature
in evaporator
before expansion valve
between compressor and condenser
between condenser and
✅ The correct answer is option C.