copper and zinc
copper and tin
copper, tin and zinc
none of these
✅ The correct answer is option B.
Mechanical Engineering MCQs
A tensile test is performed on a round bar. After fracture, it has been found that the diameter remains approximately same at fracture. The material under test was
mild steel
cast iron
glass
copper
✅ The correct answer is option B.
De-Laval turbine is a
simple impulse turbine
simple reaction turbine
impulse-reaction turbine
none of these
✅ The correct answer is option A.
According to Euler’s column theory, the crippling load for a column length (l) hinged at both ends, is
✅ The correct answer is option A.
A cycle consisting of __________ and two isothermal processes is known as Stirling cycle.
two constant pressure
two constant volume
two isentropic
one constant pressure,
✅ The correct answer is option B.
The cross-section of the arm of a bell crank lever is
rectangular
elliptical
I-section
any one of these
✅ The correct answer is option D.
When slack of an activity is zero, the activity is critical and any delay in its performance will delay the completion of the whole project.
Yes
No
✅ The correct answer is option A.
In figure shown, E is a heat engine with efficiency of 0.4 and R is a refrigerator. It is given that Q2 + Q4 = 3Q1. The C.O.P. of the refrigerator is
2.5
3
4
5
✅ The correct answer is option D.
In electro-discharge machining, dielectric is used to
help in the movement of the sparks
control the spark discharges
act as coolant
all of these
✅ The correct answer is option D.