81. Thermit welding is a form of:
A. Fusion welding
B. Gas welding
C. Resistance welding
D. Arc welding
82. Electrode gets consumed in which type of welding process?
A. Arc
B. Thermit
C. T.I.G
D. Gas
83. Which of the following metals can be easily drawn into the wire?
A. Lead
B. Copper
C. Tin
D. Zinc
84. Lube oil is used in diesel engines:
A. To ignite
B. To cool the engine
C. To reduce friction
D. B and C both
85. Air is changed in the cylinder of the diesel engine by:
A. Exhaust valve
B. Inlet valve
C. Injector
D. Airbox
86. Type of filter fitted in a tractor is:
A. Paper type
B. Cotton type
C. Oil-bath type
D. Wire type
87. Nichrome is commonly used for:
A. Transformer windings
B. Battery connections
C. Lamp filament
D. Heater coils
88. The equation for the Time period of the Simple Pendulum is?
(A) T=2√l/g
B) T=2ℼ√l/g
(C) T=2√g/k
(D) None of the above
89. What is the equation of Hook’s Law?
(A) F=x/K
B) F=-Kx
(C) x=-FK
(D) K=-x/F
90. _ is the example of longitudinal waves.
(A) Light waves
B) Sound waves
(C) Water waves
(D) Radio waves
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