2016 FITTER THEORY SEM-IV

2016 FITTER THEORY SEM-IV

21.Why is an idler gear used in gear trains?

a) To obtain minimum center distance

     between driving and driven snatt

b) To have required direction of rotation

c) Both (a) & (b)
d. None of these

Answer:- b) To have required direction

                     of rotation

22. Determine torque transmitted on

the pinion shaft if torque transmitted

on gear shaft is 20 nm consider Gear ratio = 4
a)8nm

b) 5 nm

c) 80 nm

d)16nm

Answer:- b) 5 nm

23. Which of the following statements

 is/are true for gear drives?

a) They can be used for long center distances

b) They are used to transmit power between

non-intersecting and parallel shafts

c) They cannot be used for high reduction ratios

d) All of these

Answer:- b) They are used to transmit power

      between  non-intersecting and parallel shaft

24. Which gears are used to connect two

 intersecting shaft axes?

a) Crossed helical gear

b) Worm and worm wheel

c) Bevel gears

d) All of these

Answer:- c) Bevel gears

25. What is meant by gear ratio?

a) The ratio of pinion speed and gear speed

b) The ratio of number of teeth on pinion

and number of teeth on gear

c) Both (a) & (b)

d) None of these

Answer:- a) The ratio of pinion speed and

                    gear speed

26. What is the function of hydraulic

       motor?

1. Hydraulic motor converts hydraulic

oil under pressure into torque and angular

displacement

2. Hydraulic motor converts hydraulic

    oil under  pressure into force and linear

    displacement

3. Hydraulic motor converts hydraulic energy

    into mechanical energy

4. Hydraulic motor converts mechanical energy

into hydraulic energy

a) 1 and 4 b) 1 and 3 c) 2 and 3 d) 2 and 4

Answer:- b) 1 and 3

27. Calculate area of a pipe if, flow rate is

20 I/min and flow velocity is 5 cm/s

a) 66.66 cm²    

b) 60 cm²     

c) 62 cm²     

d) None of these

Answer:- a) 66.66 cm²

28. What this hydraulic symbol

a) Motor unidirectional

b) Motor bidirectional

c) Pump unidirectional

d) Pump bidirectional

Answer:- a) Motor unidirectional

29. In soldering the melting point of filler

metal is ...................

a) Below 420°C       

b) Above 420°C      

c) Below 520°C       

d) Above 520°C

Answer:- b) Above 420°C

30. The composition of electrician

solder is ...........

a) Lead-37%, tin-63%

b) Lead-50%, tin-50%

c) Lead-63%, tin-37%

d) Lead-70%, tin-30%

Answer:- d) Lead-70%, tin-30%