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Tuesday 29 December 2015

General Science Physics -7

91. A diode converts:
(a)DC into AC      
(b) AC into DC     
(c) Both AC and DC       
(d) None of these
Answer: (b)

92. A cotton wick dipped in pure honey when ignited with a match stick will:
(a)Burn consistantly                             
(b) Burn with cracking sound
(c) Does not burn at all                        
(d) Burn with too much smoke
Answer: (a)
93. An example of a substance which is neither a good conductor of electricity nor an insulator is:
(a) Uranium             
(b) Magnisium            
(c) Sodium              
(d) Germanium
Answer: (d)

94. Which type of heat treatment helps steel to bend?
 (a) Annealing         
(b) Tempering              
(c) Hardening          
(d) None of these
Answer: (a)

95. The Universal Product Code (UPC) is a standard symbology for which of the following?
(a)Fire safety code                          
(b) Bar code
(c) Building safety code                   
(d) None of these
Answer: (b)
96. Newton’s first law gives the defenition for:
(a)Force          
(b) Velocity             
(c) Mass             
(d) Inertia
Answer: (d)

97. The type of glass which can cut off ultra violet rays:
(a)Flint glass             
(b) Crookes glass
(c) Pyrex glass           
(d) Safety glass
Answer: (b)

98. The energy absorbed during the change of a state of substance is called:
(a)Specific heat                                 
(b) Latent heat
(c) Coefficient of expansion             
(d) Refractive index
Answer: (b)
99. The mirror used in search light is:
(a)Convex          
(b) Concave          
(c) Spherical        
(d) Parabolic
Answer: (d)

100. What is measured by spring balance?
(a)Weight            
(b) Density        
(c) Mass            
(d) Pressure
Answer: (a)
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