1. __________ are statements of equivalent values of different units in the form of ratios.
a) Fraction factor
b) Conversion factor
c) Expand factor
d) None of the mentioned
Explanation: Conversion factor are statements of equivalent values of different units in the form of ratios.
2. Which one is an incorrect conversion
a) 1 inch = 2.54 cm
b) 1 mile = 5280 ft.
c) 1 ft. = 12 inch
d) None of the mentioned
Explanation: All above mentioned are correct conversions of length.
3. A car is travelling with a speed of 550 ft/sec. How fast it is going in miles per hour?
a) 375
b) 750
c) 900
d) 1800
Explanation: 1 mile = 5280 ft and 1 hour = 3600 sec.
4. 30 (in)(cm2)/(yr)(s)(lbm)(ft2) to all SI units.
a) 5.72×10-11
b) 4.76×10-11
c) 8.73×10-11
d) 4.45×10-12
Explanation: 1 lbm = 454 g, 1 ft = 12×2054 centimetres and 1yr = 365×24×60×60 sec.
5. Oil is flowing through a 4 in.-diameter pipe having a velocity of 6 ft/sec. The flow rate gallon per minute and kinetic energy of water in (ft)(lbf)/lbm are respectively?
a) 469.92 and 1.12
b) 352.44 and 0.84
c) 234.96 and 0.56
d) 117.48 and 0.28
Explanation: K.E. = 0.5mv2 and Q = Av.
6. What is the potential energy of a box in (ft)(lbf), kept on a wall having a height 20 ft above the surface? Assume that the mass of the box is 100 lb.
a) 1000
b) 2000
c) 3000
d) 4000
Explanation: PE = mgh, g = 32.2 ft/s2.
7. What is the value of 200 ft3/min in mile3/day?
a) 0.95×10-6
b) 1.95×10-6
c) 0.95×106
d) 1.95×106
Explanation: 1 mile = 5280 ft and 1 day = 24*60 minutes.
8. 1.5 nm. is equal to
a) 1.5*10^-8 dm
b) 0.15 Angstrom
c) 5.9*10^-10 in
d) All of the mentioned
Explanation: 1 in. = 2.54 cm, 1 Angstrom = 10*^-10 meter, 1 meter = 0.1 dm.
9. Acceleration of gravity in AE system is equal to
a) 0.32174 ft/s2
b) 3.2174 ft/s2
c) 32.174 ft/s2
d) 321.74 ft/s2
Explanation: Acceleration of gravity in AE system is equal to 32.174 ft/s2.
10. Fundamental unit for the length in metric system is
a) cm
b) m
c) in
d) yd
Explanation: Fundamental unit for the length in metric system is meter (m).