WORKSHOP CALCULATION AND SCIENCE
Monthly test (November-2015)
Time: 1:30 hours
Total marks: 50
1. A piece of alloy weighing 80grams consists of 60grams of copper and the remaining is zinc. The ratio of
copper to zinc is...
a) 3:2
b) 3:4
c) 3:1
d) 3:3
2. 1200kg of mild steel 25% of metal is cul and removed. The net weight of remaining
a) 600kg
b) 700kg
c) 900kg
d) 1000kg
3 How much of tin is required to make an alloy consisting of tin, antimony and lead in the given ratio if-
Tin. antimony: lead = 15:4:1
Antimony available = 5kg
Quantity of tin =?
a) 18.75
b) 17.75kg
c) 16.75kg
d) 1000kg
4. 2% of 2 =
a) 0.4
b) 0.04
c) 0.004
d) 0.0004
5. x :: 5 3:2.5 the value of 'x' is -
a) 6
b) 5
C) 3
d)2.5
6. x% of 40 is 10, then the 'x' is
a) 10
b) 40
c) 25
d) 100
7. In an alloy of 80 grams copperis 60grams the remaining is zinc, the ratio copper to zinc is
a) 4:1
b) 3:1
c) 2:1
d) 1.5:1
8. 0.05 of 10 is ______ %
a) 5
b) 0.5
c) 50
d) none
9. If A:B = 2:3 and B:C = 4:5. Find A:B:C
a) 8:12:15
b) 4:6.8
c) 2:4:6
d) 9:13:15
10. What percentage is 10paise of a rupee?
a) 20%
b) 1/10%
c) 5%
d) 10%
11. A:B = 2:3 and B:C = 4:5. Then A.C what
a) 8:15
b) 8.12
c) 7:12
d) 7:15
12. Cost price = Rs.400; gain =15% selling price =?
a) Rs.4600
b) Rs.360
c) Rs.460
d) Rs.640
13. The volume of a gas at 770mm pressure is 403c. Find the pressure where the valume is reduced is 341cc
a) 910mm
b) 810 mm
c) 710mm
d) 610mm
14. Ravi sold his radio set for Rs.700 and he got a profit of 40%. Actual cost of the set is
a) Rs.420
b) Rs.600
c) Rs.500
d) none
15. What is the rpm n2(in min-1) of the driven pulley?
a) n2 = 1600min-1
b) n2-2545 min-1
c) n2 =4900 min-1
d) n2 =7840 min-1
16. What percentage is 18kg of 75kg
a) 72%
b) 18%
c) 24%
d) none
17. The outer dia. (D) and inner dia. (d) of a wheel is in the ratio 1.75:1. If inner dia. 20mm, what will be outer dia. (D)
a) 25mm
b) 30mm
c) 35mm
d) 40mm
18._______ %is equal to 3/8..
a) 37
b) 38
c) 37.5
d) 40
19. Calculate the d of the frustum of a cone if :
D = 50mm, H=80mm, h = 36mm, d = ?
a) 26.5mm
b) 24.5mm
c) 22.5mm
d) 20.5mm
20. 20out of 100means _______ %
a) 40
b) 10
c) 20
d)60
21. How many times will be made by a wheel of diameter travelling the same distance if
.67.5cm diameter makes 1600 complete turns to travelling a distance
.75cm diameter, how much turns will it makes for the same distance
a) 1440
b) 1400
c) 1360
d) 1320
22. A person spent 85% of his monthly income and here after he saves Rs.360 per month, then his total income is
a Rs.2400
b) Rs.2000
C) Rs.2200
d) Rs.640
23. 25 workers can complete a work in 30 hours. Find the number of hours required to complete the same work by 10 workers?
a) 65hours
b) 75hours
c) 85hours
d) 95hours
24. A firm manufactures 600 vehieles every month. Its production is raised 15%. Find out the new output per month. I the production falls to 500 vehicles per month. What is the percentage los in production?
a 669, 14.6%
b) 679, 15.6%
c) 690, 16.6%
d) 720, 17.6%
25. In a hand drilling machine, the driving motor runs at 3600rpm and the drive is transmitted through gear wheels of 8 and 32 teeth's. The 8 teeth's gear is being on the motor shaft. Determine the rpm of drilling machine
a) 3600rpm
b) 1800rpm
c) 900rpm
d) 800rpm