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

151)   

Which machine has VR = 2 and MA = 1.8? Efficiency is: 

A.
B.
C.
D.
Answer: A
152)   

Pulley systems are used for lifting because they:

A.
B.
C.
D.
Answer: A
153)   

A single movable pulley gives MA of: 

A.
B.
C.
D.
Answer: A
154)   

The VR of a screw jack depends on: 

A.
B.
C.
D.
Answer: A
155)   

Ideal machine has: 

A.
B.
C.
D.
Answer: A
156)   

The SI unit of stress is:

A.
B.
C.
D.
Answer: A
157)   

Elastic limit is: 

A.
B.
C.
D.
Answer: A
158)   

Beyond yield point, material becomes: 

A.
B.
C.
D.
Answer: A
159)   

Young's modulus measures: 

A.
B.
C.
D.
Answer: A
160)   

Tensile stress occurs due to: 

A.
B.
C.
D.
Answer: A
161)   

Compressive stress occurs due to: 

A.
B.
C.
D.
Answer: A
162)   

Unit of Young’s modulus: 

A.
B.
C.
D.
Answer: A
163)   

Steel has higher Young’s modulus than: 

A.
B.
C.
D.
Answer: D
164)   

Ductile materials show:

A.
B.
C.
D.
Answer: A
165)   

Brittle materials fail at: 

A.
B.
C.
D.
Answer: A
166)   

Elasticity is high in:

A.
B.
C.
D.
Answer: A
167)   

Strain energy is stored in material when:

A.
B.
C.
D.
Answer: A
168)   

Stress–strain curve ends at: 

A.
B.
C.
D.
Answer: A
169)   

Toughness of a material means:

A.
B.
C.
D.
Answer: A
170)   

Area under stress–strain curve gives: 

A.
B.
C.
D.
Answer: A
171)   

Hooke’s Law is valid for: 

A.
B.
C.
D.
Answer: A
172)   

Which has highest breaking strength?

A.
B.
C.
D.
Answer: A
173)   

Hardness is the resistance to:

A.
B.
C.
D.
Answer: A
174)   

If strain increases but stress is constant, the material is in:

A.
B.
C.
D.
Answer: A
175)   

When stress is removed in elastic region, the body:

A.
B.
C.
D.
Answer: A