Choose the correct answer.
1.Tan45°, cot 45°=
a. 1
b.1/2
c.1/√2
d. 0
2. Circumference of a circle is given by______
a. πD
b. 2r
c. Both (a) & (b)
d. Neither a nor b
3.The area of a parallelogram is 72 cm and its altitude is twice the corresponding base. Then
the length of the base is_____.
a. 12 cm
b. 9 cm
C. 6 cm
d. 3 cm
4.The ratio of area of a circle to the area of semi-circle is-
a. 1:2
b .2: 1
c..4:1
d.1:4
5.A circular well with a diameter of 2 meters, is due to a depth of 14 meters. What is the volume of the carth dug out?
a. 40m3
b.40 m3
c.44 m3
d 46 m3
6. If x+y= 18 and x-y=2. Find the value of x and y.
a. 6,4
b.8,8
c. 10,8
d. 12,9
7. 2 x 0.2 x 0.02 x 0.002x 20=
a. 0.032
b. 0.0032
c. 0.00032
d. 0.000032
8. Add 110.035, 32, 18.6, 0.79, 3.5427
a. 416.9677
b. 164.9677
c. 146.9767
d. 461.7977
9.Whar is the reciprocal of tanθ?
a. 1/tanθ
b. cosθ
c. cotθ
d. cosecθ
10. Volume of cylinder -
a. πR2H
b. 1/3 πR2H
c. 2/3 πR2H
d.2πR2H
11.Latent heat of ice is-
a 40 cal gram
b 80 cal/gram
c.120 cal/gram
d.160 cal/gram.
12. The ratio of distance moved by the effort to the distance by the load is called -
a. Efficiency
b .Velocity ratio
C .Mechanical advantage
d .All of these
13. What is the formula for given ratio of a velocity simple wheel and axle -
a. d/D
b. πd/D
c. D/d
d. πD/d
14. In a parallel cireuit operating with a battery of 30 VAC, designed to carry a total current of 6A, the resistance suddenly changes to 2Ω. The fuse will____.
a. Closes
b. No change
c. Shorts to ground
d. Opens
15.Which of the following parameters should be considered while connecting a volimeter into a DC circuit?
a. rms
b. Resistance
C Polarity
d. Power factor
16.Which one of the following is not a electrical quantity?
a. Voltage
b. Current
C. Distance
d. Power.
17.Ohmmeter is used for measure -
a. Current
b. Resistance
c. Potencial difference
d. All of these
18. Correct scquenoe of current flow in simple electric circuit is-
a. Load, switch, battery
b. Battery switch. load
c. Load, battery. swich
d Switch, load, batery
19. √0.9 x √1.6 = ?
a.0.12
b. 1.2
c. 0.75
d.12
b. 1.2
20. The boiling point of alcohol is 78° C. What is this temperature on the Kelvin scale?
a 151° K
b. 251° K
C. 351° K
d. 451° K
21. In A.C supply number of cycles per second is called-
a. Frequency
b. Voltage
C. Current
d. Resistance
22. 1+tan2 θ =
a. cosec θ
b. sec e
c. cosec . tan2 θ
d. sec2 θ
23. Sin2 45°+cos2 450
a. 1
b. 1/2
c. 0
d1/√2
24.cosec 00 ____.
a. 1
b. √3
c.2/√3
d. None of these
25. Wheel and axle is an example of_____.
a. Lever
b. Inclined plane
c. Pulley
d. Simple machines