Related Questions

By walking at 3/4 of his usual speed, a man reaches his office 20 minutes later than usual. His usual time is :
A 30 minutes
B 75 minutes
C 45 minutes
D 60 minutes
A person walking 5/6 of his usual rate is 40 minutes late. What is his usual time?
A 2 hours 20 minutes
B 3 hours 20 minutes
C 2 hours
D 4 hours 10 minutes
A train left 1 hour later than the scheduled time but in order to reach its destination 200 km away in time, it had to increase its usual speed by 10 km/hr. What is the usual speed (in km/hr) of the train?
A 38
B 42
C 45
D 40
Travelling at 4/5th of his usual speed, a man is 15 minutes late. What is his usual time to cover the same distance?
A 15 min
B 1 hr
C 75 min
D 45 min
Soldering of two metals is possible because of the property of :
A Viscosity
B Osmosis
C Cohesion
D Surface tension
Temperature attained in soldering of metals is about __________ °C.
A 150-300
B 400-500
C 650-800
D 1000-1100
The joint for soldering is supported by binding wire made of
A Mild steel
B Copper
C Soft iron
D Stainless steel
Use of flux during soldering is done to
A Increase flidity of solder by lowering its melting temperature
B Prevent oxide formation
C Wash away surplus solder
D Full up the joint gap
Perminvar alloy having constant permeability is an alloy of
A Nickel, copper and iron
B Nickel, copper and zinc
C Copper, nickel and antimony
D Iron, zinc and bismuth
The partial pressure of each constituent present in an alloy is __________ the total vapor pressure exerted by the alloy.
A Less than
B Equal to
C More than
D Either B or C; depends on the type of alloy

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