Question
Number. 29. How is the area of a circle calculated? (r=radius,
d=diameter).
Option
A. 2 x 3.142 x r.
Option
B. d2
x 3.142.
Option
C. r2
x 3.142.
Correct
Answer is. r2
x 3.142.
Explanation. Area
= πr2
.
Question
Number. 30. Determine the following : 9/4 + 5/12 + 5 1/8.
Option
A. 2 25/24.
Option
B. 4 1/12.
Option
C. 7 19/24.
Correct
Answer is. 4 1/24.
Explanation. 54/24
+ 10/24 + 5 3/24 = 7 19/24
Question
Number. 31. The specific torque loading for a bolt is 50 lbs.ins but
an extension of 2 is needed to reach the bolt in addition to the 8
torque wrench. What will the actual reading?.
Option
A. 60 lb.ins.
Option
B. 54 lb.ins.
Option
C. 40 lb.ins.
Correct
Answer is. 40 lb.ins.
Explanation. New
torque reading = desired torque x L/(x + L). 50 x 8/10 = 40 lb.ins.
Question
Number. 32. Express the fraction 7/8 as a decimal.
Option
A. 0.785.
Option
B. 0.878.
Option
C. 0.875.
Correct
Answer is. 0.875.
Explanation. Use
long division.
Question
Number. 33. Determine 0.75 x 0.003.
Option
A. 0.225.
Option
B. 0.00225.
Option
C. 0.0225.
Correct
Answer is. 0.00225.
Explanation. Easiest
way is to multiply by 0.001 (0.75 x 0.001 = 0.00075) then multiply by
3. (75 x 3 = 225, so 0.00075 x 3 = 0.00225).
Question
Number. 34. Convert 162 knots to MPH.
Option
A. 186 mph.
Option
B. 176 mph.
Option
C. 196 mph.
Correct
Answer is. 186 mph.
Explanation. 1
knots = 1.15 mph, 162 x 1.15 = 186 mph.
Question
Number. 35. To convert inches to millimetres, it is necessary to.
Option
A. divide by 25.4.
Option
B. multiply by 25.4.
Option
C. multiply by 2.54.
Correct
Answer is. multiply by 25.4.
Explanation. There
are 25.4 mm in 1 inch.
Question
Number. 36. 3/4 x 82 =.
Option
A. 123.
Option
B. 61.5.
Option
C. 81.5.
Correct
Answer is. 61.5.
Explanation. Estimate
3/4 of 82.
Question
Number. 37. A circular patch is held together by seven equally spaced
rivets. What is their angular spacing?.
Option
A. 51.50°.
Option
B. 52°.
Option
C. 51.43°.
Correct
Answer is. 51.43°.
Explanation. 360/7
= 51.43 degrees.
Question
Number. 38. Add together; 3/4, 5/16, 7/8 and 0.375.
Option
A. 2 5/16.
Option
B. 2 1/8.
Option
C. 2 1/4.
Correct
Answer is. 2 5/16.
Explanation. 0.375
= 3/8. 3/4 + 5/16 + 7/8 + 3/8 (LCD = 16) 12/16 + 5/16 + 14/16 + 6/16
= 37/16 = 2 5/16.
Question
Number. 39. To convert pounds of fuel into kilograms, it is necessary
to.
Option
A. divide by 0.4536.
Option
B. multiply by 4536.
Option
C. multiply by 0.4536.
Correct
Answer is. multiply by 0.4536.
Explanation. 2.2
lb = 1 kg. 1lb = 0.4536 kg.
Question
Number. 40. If resin to hardener is used in the ratio of 1000:45, how
much hardener is used with 60 grams of resin?.
Option
A. 145 grams.
Option
B. 47 grams.
Option
C. 2.7 grams.
Correct
Answer is. 2.7 grams.
Explanation. Ratio
of hardener to resin is 45:1000, or 0.45:10. For 60 gms of resin, use
0.45 * 6 hardener = 2.7 gms.
Question
Number. 41. Determine the following 11/16 + 5/8.
Option
A. 11/10.
Option
B. 1 55/128.
Option
C. 1 5/16.
Correct
Answer is. 1 5/16.
Explanation. 11/16
+ 5/8 (LCD = 16) 11/16 + 10/16 = 21/16 = 1 5/16.
Question
Number. 42. 6 mm is equal to.
Option
A. 0.625 inches.
Option
B. 0.236 inches.
Option
C. 0.375 inches.
Correct
Answer is. 0.236 inches.
Explanation. 6mm
= 0.6cm. So, 0.6/2.54 = 0.236
Question
Number. 43. Weight is equal to.
Option
A. volume x gravity.
Option
B. mass x acceleration.
Option
C. mass x gravity.
Correct
Answer is. mass x gravity.
Explanation. Weight
= mass x gravity.
Question
Number. 44. 8 + 4[5 x 2 (5-9/3)] =.
Option
A. 88.
Option
B. 12.
Option
C. 48.
Correct
Answer is. 88.
Explanation. Work
from the inner brackets - outwards.
Question
Number. 45. To convert gallons to litres.
Option
A. multiply by 4.55.
Option
B. multiply by 0.00455.
Option
C. multiply by 0.568.
Correct
Answer is. multiply by 4.55.
Explanation. 1
gallon = 4.55 litres.
Question
Number. 46. A cylinder has a diameter of 20 cm and a length of 20 cm,
what is its volume?.
Option
A. 1240 cm3
.
Option
B. 6200 cm3
Option
C. 400 cm3
.
Correct
Answer is. 6200 cm3
.
Explanation. Volume
of a cylinder = π x r2 x length of cylinder = π x 100 x 20 = 3.1 x
100 x 20 = 6200.
Question
Number. 47. 31/8 – 11/5 =.
Option
A. 23/40.
Option
B. 13/40.
Option
C. 67/40.
Correct
Answer is. 67/40.
Explanation. 155/40
- 88/40 = 67/40
Question
Number. 48. What is the formula for calculating the curved area of a
cone?.
Option
A. π x radius2 x height.
Option
B. π x radius x height.
Option
C. 2/3 x π x radius x height.
Correct
Answer is. π x radius x height.
Explanation. π
x radius x height.
Question
Number. 49. Determine 10 ( 23) + 10 ( 25).
Option
A. 520.
Option
B. 320
Option
C. 480.
Correct
Answer is. 480.
Explanation. Work
out the contents of the brackets in this:- (10 x 23) + (10 x 25).
Question
Number. 50. One radian is equal to.
Option
A. 90°.
Option
B. 75°.
Option
C. 57.5°.
Correct
Answer is. 57.5°.
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