MCQ - TNPSC JTO
JTO - 540 - Trade - Workshop Calculation Science
540 - UNIT - 08 - Centre of Gravity Levers and Simple
65)
Nut and bolt work on the principle of:
A.
B.
C.
D.
66)
In ideal machines, mechanical advantage equals:
A.
B.
C.
D.
67)
When effort increases, mechanical advantage:
A.
B.
C.
D.
68)
Young’s modulus is defined as the ratio of:
A.
B.
C.
D.
69)
If VR = 3 and MA = 1.5, the efficiency is:
A.
B.
C.
D.
70)
The higher the VR, the more:
A.
B.
C.
D.
71)
A machine with 100% efficiency is called:
A.
B.
C.
D.
72)
Efficiency can be increased by reducing:
A.
B.
C.
D.
73)
Which of the following has highest Young’s modulus?
A.
B.
C.
D.
74)
Plastic region in stress-strain curve shows:
A.
B.
C.
D.
75)
Working stress is always:
A.
B.
C.
D.
76)
In a uniform lamina, the centre of gravity lies at:
A.
B.
C.
D.
77)
In an irregular-shaped body, the CG is found by:
A.
B.
C.
D.
78)
Which of the following is NOT a function of a simple machine?
A.
B.
C.
D.
79)
A fixed pulley is used to:
A.
B.
C.
D.
80)
Inclined planes are used to:
A.
B.
C.
D.