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Mechanical - 540 - UNIT - 08 - Centre of Gravity Levers and Simple - MCQ

76)   

In a uniform lamina, the centre of gravity lies at: 

A.
B.
C.
D.
Answer: C
77)   

In an irregular-shaped body, the CG is found by: 

A.
B.
C.
D.
Answer: C
78)   

Which of the following is NOT a function of a simple machine? 

A.
B.
C.
D.
Answer: D
79)   

A fixed pulley is used to: 

A.
B.
C.
D.
Answer: B
80)   

Inclined planes are used to:

A.
B.
C.
D.
Answer: A
81)   

MA > 1 implies: 

A.
B.
C.
D.
Answer: A
82)   

MA of a movable pulley is generally: 

A.
B.
C.
D.
Answer: C
83)   

 In an inclined plane, VR is equal to: 

A.
B.
C.
D.
Answer: C
84)   

If a machine has VR = 4 and MA = 2, what is the efficiency? 

A.
B.
C.
D.
Answer: B
85)   

Efficiency of an ideal machine is: 

A.
B.
C.
D.
Answer: D
86)   

Machines are never 100% efficient in real life due to:

A.
B.
C.
D.
Answer: C
87)   

Rubber is an example of: 

A.
B.
C.
D.
Answer: C
88)   

Which graph best represents elastic limit? 

A.
B.
C.
D.
Answer: C
89)   

Breaking point is the point where:

A.
B.
C.
D.
Answer: C
90)   

What is the SI unit of Young’s Modulus? 

A.
B.
C.
D.
Answer: A
91)   

The CG of a hemisphere lies at: 

A.
B.
C.
D.
Answer: C
92)   

Which is a compound machine?

A.
B.
C.
D.
Answer: B
93)   

Third class levers have: 

A.
B.
C.
D.
Answer: B
94)   

MA = Load / Effort. If Load = 100 N, Effort = 25 N, MA = ?

A.
B.
C.
D.
Answer: D
95)   

 In a screw jack, VR depends on:

A.
B.
C.
D.
Answer: B
96)   

Efficiency is given by: 

A.
B.
C.
D.
Answer: A
97)   

Which of the following materials is plastic?

A.
B.
C.
D.
Answer: C
98)   

Strain has:

A.
B.
C.
D.
Answer: C
99)   

Stress is defined as: 

A.
B.
C.
D.
Answer: B
100)   

Ultimate stress is the:

A.
B.
C.
D.
Answer: A