C:-temporary
D:-hard
Correct Answer:- Option-B
Question49:-Brass is an alloy of
A:-copper and tin
B:-copper and lead
C:-copper and zinc
D:-copper and aluminium
Correct Answer:- Option-C
Question50:-Purpose of using lubrication
A:-reduces friction
B:-prevents wear
C:-bothAand B
D:-none of the above
Correct Answer:- Option-C
Question51:-The temperature at which the oil catches fire and continues to be in flame is called
A:-flash point
B:-fire point
C:-pour point
D:-oiliness
Correct Answer:- Option-B
Question52:-Machining processes that involve the removal of material in the form of chips can be called
A:-conventional machining process
B:-electro discharge machining process
C:-nonconventional machining process
D:-electro chemical machining process
Correct Answer:- Option-A
Question53:-Purpose of machine foundation
A:-it must support the machines at the given height and must be able to take up static and dynamic loads
B:-it should preserve the alignment of the machine
C:-it should absorb the vibration of the moving parts
D:-all of the above
Correct Answer:- Option-D
Question54:-10 machinists completed a work in 9 days. How long will it take for 15 machinists to do the same work 7
‏5-:ھ‎ 5
B:-6 days
C:-7 days
D:-8 days
Correct Answer:- Option-B
Question55:-The square root of 0.04 is
‏2-ھ‎
‎B:-0.02
‎C:-0.6
‎D:-0.4
‎Correct Answer:- Option-A
Question56:-The cutting speed is expressed in
A:-millimeter/sec
B:-meter/sec
C:-millimeter/min
D:-meter/min
Correct Answer:- Option-D
Question57:-The conic section obtained by cutting plane parallel to the axis of cone is
A:-Ellipse
B:-Parabola
C:-Hyperbola
D:-None of the above
Correct Answer:- Option-C
Question58:-The rate of change of displacement of a body is called
A:-acceleration