Multiple Choice
Some substances generate voltage when they are subjected to mechanical forces or stresses along specific planes. Such subtances are known as
A) Photo-electric
B) Megneto-electric
C) Thermo-electric
D) Piezo-electric
E) Radio-active
Correct Answer:

Verified
Correct Answer:
Verified
Q15: Miter gears are<br>A)Gears of different modules<br>B)Spur gears
Q16: Optical flats are made of<br>A)Quartz<br>B)Steel<br>C)Plastic<br>D)Brass<br>E)Bakelite
Q17: If the correctness of profile of a
Q18: Cast iron gears are used where<br>A)Stresses on
Q19: In gas welding using oxygen and acetylene
Q21: Steam condenser tubes are generally made of<br>A)Brass<br>B)Bronze<br>C)Bell
Q22: In ultrasonic welding the frequency range is
Q23: The surface finish obtainable in abrasive jet
Q24: Resistance wire strain gauge works on the
Q25: Ball bearing races are<br>A)Lapped<br>B)Ground<br>C)Nickel plated<br>D)Buffed<br>E)Turned