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

1)   
Centre of gravity is the point where the total _______ of the body acts.
A.
B.
C.
D.
Answer: C
2)   
The centre of gravity of a regular cone lies at what fraction of its height from the base?
A.
B.
C.
D.
Answer: B
3)   

In a simple machine, the ratio of load to effort is called: 

A.
B.
C.
D.
Answer: B
4)   

Velocity ratio is the ratio of: 

A.
B.
C.
D.
Answer: B
5)   

Which of the following is NOT a simple machine? 

A.
B.
C.
D.
Answer: C
6)   

The efficiency of an ideal machine is

A.
B.
C.
D.
Answer: D
7)   

Efficiency formula is given by:

A.
B.
C.
D.
Answer: B
8)   

Elasticity is the property of a material to:

A.
B.
C.
D.
Answer: B
9)   

Which of the following is an elastic material?

A.
B.
C.
D.
Answer: A
10)   

Stress is defined as

A.
B.
C.
D.
Answer: B
11)   

Strain is: 

A.
B.
C.
D.
Answer: B
12)   

Young’s modulus is the ratio of:

A.
B.
C.
D.
Answer: C
13)   

Ultimate stress is the maximum stress a material can withstand before: 

A.
B.
C.
D.
Answer: C
14)   

Working stress is always _______ than ultimate stress. 

A.
B.
C.
D.
Answer: C
15)   

The factor of safety is defined as

A.
B.
C.
D.
Answer: C
16)   

The centre of gravity of a symmetrical object lies at its:

A.
B.
C.
D.
Answer: C
17)   

Which of the following will have the lowest centre of gravity? 

A.
B.
C.
D.
Answer: B
18)   

A lever works on the principle of:

A.
B.
C.
D.
Answer: C
19)   

Which class of lever is a pair of tweezers? 

A.
B.
C.
D.
Answer: C
20)   

In an ideal machine, which is true?

A.
B.
C.
D.
Answer: C
21)   

Mechanical advantage is a number that is always: 

A.
B.
C.
D.
Answer: C
22)   

A machine with MA > 1 is useful to: 

A.
B.
C.
D.
Answer: C
23)   

VR of a single movable pulley is:

A.
B.
C.
D.
Answer: B
24)   

In an inclined plane, VR is:

A.
B.
C.
D.
Answer: B
25)   

Plastic materials are used where ______ is not required

A.
B.
C.
D.
Answer: D