# ISRO Technical Assistant 8

Sample Question Paper Mini Test Series: ISRO Technical Assistant 8

ISRO Mechanical Technical Assistant 8

Part 8: List for questions and answers of Sample Question Paper (ISRO Technical Assistant)

Q1. A tensile load of 500 N is applied to a circular rod of diameter 5 mm. The normal stress is approximately

a) 100 N/square millimeter

b) 25 Mpa

c) 100 N/suare centimeter

d) 25 Nmm

Q2. A reversible heat engine operates between 300K and 600K. If heat output is 200 KJ, the heat input is

a) 100 kJ

b) 300 kJ

c) 600 kJ

d) 400 kJ

Q3. Bernoulli's theorem applies to which type of flow

a) incompressible

c) non-viscous

d) all of these combined

Q4. Tensile stress in thin spherical shell subjected to internal pressure is

a) pd/4t

b) pd/2t

c) pd/8t

d) pd/3t

Q5. Cavitation in a pump is associated with which pressure

a) atmospheric

b) critical

c) vapour

d) None of these

Q6. Petrol engine works on

a) Carnot cycle

b) Rankine cycle

c) Otto cycle

d) Joule cycle

Q7. Pressure at a depth of 15 m under water surface in a dam is approximately

a) 15 bar (a)

b) 1.5 Mpa

c) 150 kPa (g)

d) None of these

Q8. Ductility of material is indicated by

a) Ultimate strength

b) Endurance strength

c) Yield strength

d) elongation

Q9. Unit of thermal conductivity is

a) J/kgK

b) W/square meter Kelvin

c) W/mK

d) None of these

Q10. Power transmitted by a shaft running at 700 rpm with torque of 6kNm is

a) 880 kW

b) 440 kW

c) 220 kW

d) None of these

Q11. water in a pipeline is doubled, then the pressure drop will be how many time the original value.

a) same as

b) 2 times

c) 4 times

d) one-half of

Q12. The average cutting speed in machining mild steel by single point tool of HSS is

a) 10 m/minute

b) 20 m/minute

c) 30 m/minute

d) 40 m/minute

Q13. The shear stress in throat area of weld joint of length 'L' and weld legh 'h', subjected to parallel load 'P' is

a) P/hL

b) 0.707 P/hL

c) 1.414 P/hL

d) None of these

Q14. In centrifugal casting method, which type of core is used

a) Sand

b) No core is used

c) ferrous

d) Non-ferrous

Q15. If the tight and slack side tensions in a flat belt running at 1 km/minute are 1500 N and 1000 N, the power transmitted is

a) 15.3 kW

b) 10 kW

c) 8.3 kW

d) None of these

Q16. Which material has maximum thermal conductivity?

a) Mild steel

b) Aluminium

c) Stainless steel

d) Copper

Q17. Two forces 40 N and 30 N act at right angles to each other on a particle. The resultant force is

a) 1200 N

b) 50 N

c) 50 kg

d) 70 N

Q18. Heat transfer occurs due to _____ difference

a) Thermal conductivity

b) Temperature

c) Specific heat

d) Heat flux

Q19. Density of mild steel is _____ kg/cubic meter

a) 10,200

b) 7,860

c) 9,010

d) None of these

Q20. A _____ die, both cutting and non-cutting operations are done in a press station in one stroke of ram.

a) Compound

b) Combination

c) Simple

d) Progressive

Part 8: List for questions and answers of Sample Question Paper (ISRO Technical Assistant)